def init_all(self):

		
		self.n_slices = n_slices
		self.n_segments = n_segments

		# define the machine
		from LHC_custom import LHC
		self.machine = LHC(n_segments = n_segments, machine_configuration = machine_configuration)
		
		# define MP size
		nel_mp_ref_0 = init_unif_edens*4*x_aper*y_aper/N_MP_ele_init
		
		# prepare e-cloud
		import PyECLOUD.PyEC4PyHT as PyEC4PyHT
		ecloud = PyEC4PyHT.Ecloud(slice_by_slice_mode=True,
						L_ecloud=self.machine.circumference/n_segments, slicer=None , 
						Dt_ref=Dt_ref, pyecl_input_folder=pyecl_input_folder,
						chamb_type = chamb_type,
						x_aper=x_aper, y_aper=y_aper,
						filename_chm=filename_chm, Dh_sc=Dh_sc,
						init_unif_edens_flag=init_unif_edens_flag,
						init_unif_edens=init_unif_edens, 
						N_mp_max=N_mp_max,
						nel_mp_ref_0=nel_mp_ref_0,
						B_multip=B_multip_per_eV*self.machine.p0/e*c)

		# setup transverse losses (to "protect" the ecloud)
		import PyHEADTAIL.aperture.aperture as aperture
		apt_xy = aperture.EllipticalApertureXY(x_aper=ecloud.impact_man.chamb.x_aper, y_aper=ecloud.impact_man.chamb.y_aper)
		self.machine.one_turn_map.append(apt_xy)
		
		n_non_parallelizable = 2 #rf and aperture
		
		# We suppose that all the object that cannot be slice parallelized are at the end of the ring
		i_end_parallel = len(self.machine.one_turn_map)-n_non_parallelizable

		# split the machine
		sharing = shs.ShareSegments(i_end_parallel, self.ring_of_CPUs.N_nodes)
		myid = self.ring_of_CPUs.myid
		i_start_part, i_end_part = sharing.my_part(myid)
		self.mypart = self.machine.one_turn_map[i_start_part:i_end_part]
		if self.ring_of_CPUs.I_am_a_worker:
			print 'I am id=%d/%d (worker) and my part is %d long'%(myid, self.ring_of_CPUs.N_nodes, len(self.mypart))
		elif self.ring_of_CPUs.I_am_the_master:
			self.non_parallel_part = self.machine.one_turn_map[i_end_parallel:]
			print 'I am id=%d/%d (master) and my part is %d long'%(myid, self.ring_of_CPUs.N_nodes, len(self.mypart))
		
		#install eclouds in my part
		my_new_part = []
		self.my_list_eclouds = []
		for ele in self.mypart:
			my_new_part.append(ele)
			if ele in self.machine.transverse_map:
				#ecloud_new = ecloud.generate_twin_ecloud_with_shared_space_charge()
				ecloud_new = DummyEcloud()
				my_new_part.append(ecloud_new)
				self.my_list_eclouds.append(ecloud_new)
		self.mypart = my_new_part
N_mp_max = N_MP_ele_init * 4.

x_kick_in_sigmas = 0.1
y_kick_in_sigmas = 0.1

chamb_type = 'polyg'
x_aper = 2.300000e-02
y_aper = 1.800000e-02
filename_chm = 'LHC_chm_ver.mat'

B_multip_per_eV = [1.190000e-12]
B_multip_per_eV = np.array(B_multip_per_eV)

# define the machine
from LHC_custom import LHC
machine = LHC(n_segments=n_segments,
              machine_configuration=machine_configuration)

# compute sigma x and y
inj_opt = machine.transverse_map.get_injection_optics()
sigma_x = np.sqrt(inj_opt['beta_x'] * epsn_x / machine.betagamma)
sigma_y = np.sqrt(inj_opt['beta_y'] * epsn_y / machine.betagamma)

x_kick = x_kick_in_sigmas * sigma_x
y_kick = y_kick_in_sigmas * sigma_y

# define PIC grid size
Dh_sc = .2e-3

# define MP size
nel_mp_ref_0 = init_unif_edens * 4 * x_aper * y_aper / N_MP_ele_init
Ejemplo n.º 3
0
class Simulation(object):
	def __init__(self):
		self.N_turns = N_turns

	def init_all(self):

		
		self.n_slices = n_slices
		self.n_segments = n_segments

		# define the machine
		from LHC_custom import LHC
		self.machine = LHC(n_segments = n_segments, machine_configuration = machine_configuration)
		
		# define MP size
		nel_mp_ref_0 = init_unif_edens*4*x_aper*y_aper/N_MP_ele_init
		
		# prepare e-cloud
		import PyECLOUD.PyEC4PyHT as PyEC4PyHT
		ecloud = PyEC4PyHT.Ecloud(slice_by_slice_mode=True,
						L_ecloud=self.machine.circumference/n_segments, slicer=None , 
						Dt_ref=Dt_ref, pyecl_input_folder=pyecl_input_folder,
						chamb_type = chamb_type,
						x_aper=x_aper, y_aper=y_aper,
						filename_chm=filename_chm, Dh_sc=Dh_sc,
						init_unif_edens_flag=init_unif_edens_flag,
						init_unif_edens=init_unif_edens, 
						N_mp_max=N_mp_max,
						nel_mp_ref_0=nel_mp_ref_0,
						B_multip=B_multip_per_eV*self.machine.p0/e*c)

		# setup transverse losses (to "protect" the ecloud)
		import PyHEADTAIL.aperture.aperture as aperture
		apt_xy = aperture.EllipticalApertureXY(x_aper=x_aper, y_aper=y_aper)
		self.machine.one_turn_map.append(apt_xy)
		
		n_non_parallelizable = 2 #rf and aperture
		
		# We suppose that all the object that cannot be slice parallelized are at the end of the ring
		i_end_parallel = len(self.machine.one_turn_map)-n_non_parallelizable

		# split the machine
		sharing = shs.ShareSegments(i_end_parallel, self.ring_of_CPUs.N_nodes)
		myid = self.ring_of_CPUs.myid
		i_start_part, i_end_part = sharing.my_part(myid)
		self.mypart = self.machine.one_turn_map[i_start_part:i_end_part]
		if self.ring_of_CPUs.I_am_a_worker:
			print 'I am id=%d/%d (worker) and my part is %d long'%(myid, self.ring_of_CPUs.N_nodes, len(self.mypart))
		elif self.ring_of_CPUs.I_am_the_master:
			self.non_parallel_part = self.machine.one_turn_map[i_end_parallel:]
			print 'I am id=%d/%d (master) and my part is %d long'%(myid, self.ring_of_CPUs.N_nodes, len(self.mypart))
		
		#install eclouds in my part
		my_new_part = []
		self.my_list_eclouds = []
		for ele in self.mypart:
			my_new_part.append(ele)
			if ele in self.machine.transverse_map:
				ecloud_new = ecloud.generate_twin_ecloud_with_shared_space_charge()
				my_new_part.append(ecloud_new)
				self.my_list_eclouds.append(ecloud_new)
		self.mypart = my_new_part

	def init_master(self):
		
		# generate a bunch 
		bunch = self.machine.generate_6D_Gaussian_bunch_matched(
						n_macroparticles=n_macroparticles, intensity=intensity, 
						epsn_x=epsn_x, epsn_y=epsn_y, sigma_z=sigma_z)
		print 'Bunch initialized.'

		# initial slicing
		from PyHEADTAIL.particles.slicing import UniformBinSlicer
		self.slicer = UniformBinSlicer(n_slices = n_slices, n_sigma_z = n_sigma_z)

		# compute initial displacements
		inj_opt = self.machine.transverse_map.get_injection_optics()
		sigma_x = np.sqrt(inj_opt['beta_x']*epsn_x/self.machine.betagamma)
		sigma_y = np.sqrt(inj_opt['beta_y']*epsn_y/self.machine.betagamma)
		x_kick = x_kick_in_sigmas*sigma_x
		y_kick = y_kick_in_sigmas*sigma_y
		
		# apply initial displacement
		bunch.x += x_kick
		bunch.y += y_kick
		
		# define a bunch monitor 
		from PyHEADTAIL.monitors.monitors import BunchMonitor
		self.bunch_monitor = BunchMonitor('bunch_evolution', N_turns, {'Comment':'PyHDTL simulation'}, 
							write_buffer_every = 8)

		
		#slice for the first turn
		slice_obj_list = bunch.extract_slices(self.slicer)

		pieces_to_be_treated = slice_obj_list
		
		print 'N_turns', self.N_turns

		return pieces_to_be_treated

	def init_worker(self):
		pass

	def treat_piece(self, piece):
		for ele in self.mypart: 
				ele.track(piece)

	def finalize_turn_on_master(self, pieces_treated):
		
		# re-merge bunch
		bunch = sum(pieces_treated)

		#finalize present turn (with non parallel part, e.g. synchrotron motion)
		for ele in self.non_parallel_part:
			ele.track(bunch)
			
		# save results		
		#print '%s Turn %d'%(time.strftime("%d/%m/%Y %H:%M:%S", time.localtime()), i_turn)
		self.bunch_monitor.dump(bunch)
		
		# prepare next turn (re-slice)
		new_pieces_to_be_treated = bunch.extract_slices(self.slicer)
		orders_to_pass = ['reset_clouds']

		return orders_to_pass, new_pieces_to_be_treated


	def execute_orders_from_master(self, orders_from_master):
		if 'reset_clouds' in orders_from_master:
			for ec in self.my_list_eclouds: ec.finalize_and_reinitialize()


		
	def finalize_simulation(self):
		pass
		
	def piece_to_buffer(self, piece):
		buf = ch.beam_2_buffer(piece)
		return buf

	def buffer_to_piece(self, buf):
		piece = ch.buffer_2_beam(buf)
		return piece

chamb_type = 'polyg'
x_aper = 2.300000e-02
y_aper = 1.800000e-02
filename_chm = 'LHC_chm_ver.mat'



B_multip_per_eV = [1.190000e-12]
B_multip_per_eV = np.array(B_multip_per_eV)


# define the machine
from LHC_custom import LHC
machine = LHC(n_segments = n_segments, machine_configuration = machine_configuration)

# compute sigma x and y
sigma_x = np.sqrt(machine.beta_x[0]*epsn_x/machine.betagamma)
sigma_y = np.sqrt(machine.beta_y[0]*epsn_y/machine.betagamma)

x_kick = x_kick_in_sigmas*sigma_x
y_kick = y_kick_in_sigmas*sigma_y

# define PIC grid size
Dh_sc = .2e-3

# define MP size
nel_mp_ref_0 = init_unif_edens*4*x_aper*y_aper/N_MP_ele_init

# define an electron cloud
Ejemplo n.º 5
0
    def init_all(self):

        self.n_slices = pp.n_slices

        # read the optics if needed
        if pp.optics_pickle_file is not None:
            with open(pp.optics_pickle_file) as fid:
                optics = pickle.load(fid)
                self.n_kick_smooth = np.sum(
                    ['_kick_smooth_' in nn for nn in optics['name']])
        else:
            optics = None
            self.n_kick_smooth = pp.n_segments

        # define the machine
        from LHC_custom import LHC
        self.machine = LHC(n_segments=pp.n_segments,
                           machine_configuration=pp.machine_configuration,
                           beta_x=pp.beta_x,
                           beta_y=pp.beta_y,
                           accQ_x=pp.Q_x,
                           accQ_y=pp.Q_y,
                           Qp_x=pp.Qp_x,
                           Qp_y=pp.Qp_y,
                           octupole_knob=pp.octupole_knob,
                           optics_dict=optics,
                           V_RF=pp.V_RF)
        self.n_segments = self.machine.transverse_map.n_segments

        # compute sigma
        inj_opt = self.machine.transverse_map.get_injection_optics()
        sigma_x_inj = np.sqrt(inj_opt['beta_x'] * pp.epsn_x /
                              self.machine.betagamma)
        sigma_y_inj = np.sqrt(inj_opt['beta_y'] * pp.epsn_y /
                              self.machine.betagamma)

        if pp.optics_pickle_file is None:
            sigma_x_smooth = sigma_x_inj
            sigma_y_smooth = sigma_y_inj
        else:
            beta_x_smooth = None
            beta_y_smooth = None
            for ele in self.machine.one_turn_map:
                if ele in self.machine.transverse_map:
                    if '_kick_smooth_' in ele.name1:
                        if beta_x_smooth is None:
                            beta_x_smooth = ele.beta_x1
                            beta_y_smooth = ele.beta_y1
                        else:
                            if beta_x_smooth != ele.beta_x1 or beta_y_smooth != ele.beta_y1:
                                raise ValueError(
                                    'Smooth kicks must have all the same beta')

            if beta_x_smooth is None:
                sigma_x_smooth = None
                sigma_y_smooth = None
            else:
                sigma_x_smooth = np.sqrt(beta_x_smooth * pp.epsn_x /
                                         self.machine.betagamma)
                sigma_y_smooth = np.sqrt(beta_y_smooth * pp.epsn_y /
                                         self.machine.betagamma)

        # define MP size
        nel_mp_ref_0 = pp.init_unif_edens_dip * 4 * pp.x_aper * pp.y_aper / pp.N_MP_ele_init_dip

        # prepare e-cloud
        import PyECLOUD.PyEC4PyHT as PyEC4PyHT

        if pp.custom_target_grid_arcs is not None:
            target_grid_arcs = pp.custom_target_grid_arcs
        else:
            target_grid_arcs = {
                'x_min_target':
                -pp.target_size_internal_grid_sigma * sigma_x_smooth,
                'x_max_target':
                pp.target_size_internal_grid_sigma * sigma_x_smooth,
                'y_min_target':
                -pp.target_size_internal_grid_sigma * sigma_y_smooth,
                'y_max_target':
                pp.target_size_internal_grid_sigma * sigma_y_smooth,
                'Dh_target': pp.target_Dh_internal_grid_sigma * sigma_x_smooth
            }
        self.target_grid_arcs = target_grid_arcs

        if pp.enable_arc_dip:
            ecloud_dip = PyEC4PyHT.Ecloud(
                slice_by_slice_mode=True,
                L_ecloud=self.machine.circumference / self.n_kick_smooth *
                pp.fraction_device_dip,
                slicer=None,
                Dt_ref=pp.Dt_ref,
                pyecl_input_folder=pp.pyecl_input_folder,
                chamb_type=pp.chamb_type,
                x_aper=pp.x_aper,
                y_aper=pp.y_aper,
                filename_chm=pp.filename_chm,
                PyPICmode=pp.PyPICmode,
                Dh_sc=pp.Dh_sc_ext,
                N_min_Dh_main=pp.N_min_Dh_main,
                f_telescope=pp.f_telescope,
                N_nodes_discard=pp.N_nodes_discard,
                target_grid=target_grid_arcs,
                init_unif_edens_flag=pp.init_unif_edens_flag_dip,
                init_unif_edens=pp.init_unif_edens_dip,
                N_mp_max=pp.N_mp_max_dip,
                nel_mp_ref_0=nel_mp_ref_0,
                B_multip=pp.B_multip_dip,
                enable_kick_x=pp.enable_kick_x,
                enable_kick_y=pp.enable_kick_y)

        if pp.enable_arc_quad:
            ecloud_quad = PyEC4PyHT.Ecloud(
                slice_by_slice_mode=True,
                L_ecloud=self.machine.circumference / self.n_kick_smooth *
                pp.fraction_device_quad,
                slicer=None,
                Dt_ref=pp.Dt_ref,
                pyecl_input_folder=pp.pyecl_input_folder,
                chamb_type=pp.chamb_type,
                x_aper=pp.x_aper,
                y_aper=pp.y_aper,
                filename_chm=pp.filename_chm,
                PyPICmode=pp.PyPICmode,
                Dh_sc=pp.Dh_sc_ext,
                N_min_Dh_main=pp.N_min_Dh_main,
                f_telescope=pp.f_telescope,
                N_nodes_discard=pp.N_nodes_discard,
                target_grid=target_grid_arcs,
                N_mp_max=pp.N_mp_max_quad,
                nel_mp_ref_0=nel_mp_ref_0,
                B_multip=pp.B_multip_quad,
                filename_init_MP_state=pp.filename_init_MP_state_quad,
                enable_kick_x=pp.enable_kick_x,
                enable_kick_y=pp.enable_kick_y)

        if self.ring_of_CPUs.I_am_the_master and pp.enable_arc_dip:
            with open('multigrid_config_dip.txt', 'w') as fid:
                if hasattr(ecloud_dip.spacech_ele.PyPICobj, 'grids'):
                    fid.write(repr(ecloud_dip.spacech_ele.PyPICobj.grids))
                else:
                    fid.write("Single grid.")

            with open('multigrid_config_dip.pkl', 'w') as fid:
                if hasattr(ecloud_dip.spacech_ele.PyPICobj, 'grids'):
                    pickle.dump(ecloud_dip.spacech_ele.PyPICobj.grids, fid)
                else:
                    pickle.dump('Single grid.', fid)

        if self.ring_of_CPUs.I_am_the_master and pp.enable_arc_quad:
            with open('multigrid_config_quad.txt', 'w') as fid:
                if hasattr(ecloud_quad.spacech_ele.PyPICobj, 'grids'):
                    fid.write(repr(ecloud_quad.spacech_ele.PyPICobj.grids))
                else:
                    fid.write("Single grid.")

            with open('multigrid_config_quad.pkl', 'w') as fid:
                if hasattr(ecloud_quad.spacech_ele.PyPICobj, 'grids'):
                    pickle.dump(ecloud_quad.spacech_ele.PyPICobj.grids, fid)
                else:
                    pickle.dump('Single grid.', fid)

        # setup transverse losses (to "protect" the ecloud)
        import PyHEADTAIL.aperture.aperture as aperture
        apt_xy = aperture.EllipticalApertureXY(
            x_aper=pp.target_size_internal_grid_sigma * sigma_x_inj,
            y_aper=pp.target_size_internal_grid_sigma * sigma_y_inj)
        self.machine.one_turn_map.append(apt_xy)

        if pp.enable_transverse_damper:
            # setup transverse damper
            from PyHEADTAIL.feedback.transverse_damper import TransverseDamper
            damper = TransverseDamper(dampingrate_x=pp.dampingrate_x,
                                      dampingrate_y=pp.dampingrate_y)
            self.machine.one_turn_map.append(damper)

        # We suppose that all the object that cannot be slice parallelized are at the end of the ring
        i_end_parallel = len(
            self.machine.one_turn_map) - pp.n_non_parallelizable

        # split the machine
        sharing = shs.ShareSegments(i_end_parallel, self.ring_of_CPUs.N_nodes)
        myid = self.ring_of_CPUs.myid
        i_start_part, i_end_part = sharing.my_part(myid)
        self.mypart = self.machine.one_turn_map[i_start_part:i_end_part]
        if self.ring_of_CPUs.I_am_a_worker:
            print 'I am id=%d/%d (worker) and my part is %d long' % (
                myid, self.ring_of_CPUs.N_nodes, len(self.mypart))
        elif self.ring_of_CPUs.I_am_the_master:
            self.non_parallel_part = self.machine.one_turn_map[i_end_parallel:]
            print 'I am id=%d/%d (master) and my part is %d long' % (
                myid, self.ring_of_CPUs.N_nodes, len(self.mypart))

        #install eclouds in my part
        my_new_part = []
        self.my_list_eclouds = []
        for ele in self.mypart:
            my_new_part.append(ele)
            if ele in self.machine.transverse_map:
                if pp.optics_pickle_file is None or '_kick_smooth_' in ele.name1:
                    if pp.enable_arc_dip:
                        ecloud_dip_new = ecloud_dip.generate_twin_ecloud_with_shared_space_charge(
                        )
                        my_new_part.append(ecloud_dip_new)
                        self.my_list_eclouds.append(ecloud_dip_new)
                    if pp.enable_arc_quad:
                        ecloud_quad_new = ecloud_quad.generate_twin_ecloud_with_shared_space_charge(
                        )
                        my_new_part.append(ecloud_quad_new)
                        self.my_list_eclouds.append(ecloud_quad_new)
                elif '_kick_element_' in ele.name1 and pp.enable_eclouds_at_kick_elements:

                    i_in_optics = list(optics['name']).index(ele.name1)
                    kick_name = optics['name'][i_in_optics]
                    element_name = kick_name.split('_kick_element_')[-1]
                    L_curr = optics['L_interaction'][i_in_optics]

                    buildup_folder = pp.path_buildup_simulations_kick_elements.replace(
                        '!!!NAME!!!', element_name)
                    chamber_fname = '%s_chamber.mat' % (element_name)

                    B_multip_curr = [0., optics['gradB'][i_in_optics]]

                    x_beam_offset = optics['x'][i_in_optics] * pp.orbit_factor
                    y_beam_offset = optics['y'][i_in_optics] * pp.orbit_factor

                    sigma_x_local = np.sqrt(optics['beta_x'][i_in_optics] *
                                            pp.epsn_x / self.machine.betagamma)
                    sigma_y_local = np.sqrt(optics['beta_y'][i_in_optics] *
                                            pp.epsn_y / self.machine.betagamma)

                    ecloud_ele = PyEC4PyHT.Ecloud(
                        slice_by_slice_mode=True,
                        L_ecloud=L_curr,
                        slicer=None,
                        Dt_ref=pp.Dt_ref,
                        pyecl_input_folder=pp.pyecl_input_folder,
                        chamb_type='polyg',
                        x_aper=None,
                        y_aper=None,
                        filename_chm=buildup_folder + '/' + chamber_fname,
                        PyPICmode=pp.PyPICmode,
                        Dh_sc=pp.Dh_sc_ext,
                        N_min_Dh_main=pp.N_min_Dh_main,
                        f_telescope=pp.f_telescope,
                        N_nodes_discard=pp.N_nodes_discard,
                        target_grid={
                            'x_min_target':
                            -pp.target_size_internal_grid_sigma * sigma_x_local
                            + x_beam_offset,
                            'x_max_target':
                            pp.target_size_internal_grid_sigma * sigma_x_local
                            + x_beam_offset,
                            'y_min_target':
                            -pp.target_size_internal_grid_sigma * sigma_y_local
                            + y_beam_offset,
                            'y_max_target':
                            pp.target_size_internal_grid_sigma * sigma_y_local
                            + y_beam_offset,
                            'Dh_target':
                            pp.target_Dh_internal_grid_sigma * sigma_y_local
                        },
                        N_mp_max=pp.N_mp_max_quad,
                        nel_mp_ref_0=nel_mp_ref_0,
                        B_multip=B_multip_curr,
                        filename_init_MP_state=buildup_folder + '/' +
                        pp.name_MP_state_file_kick_elements,
                        x_beam_offset=x_beam_offset,
                        y_beam_offset=y_beam_offset,
                        enable_kick_x=pp.enable_kick_x,
                        enable_kick_y=pp.enable_kick_y)

                    my_new_part.append(ecloud_ele)
                    self.my_list_eclouds.append(ecloud_ele)

        self.mypart = my_new_part

        if pp.footprint_mode:
            print 'Proc. %d computing maps' % myid
            # generate a bunch
            bunch_for_map = self.machine.generate_6D_Gaussian_bunch_matched(
                n_macroparticles=pp.n_macroparticles_for_footprint_map,
                intensity=pp.intensity,
                epsn_x=pp.epsn_x,
                epsn_y=pp.epsn_y,
                sigma_z=pp.sigma_z)

            # Slice the bunch
            slicer_for_map = UniformBinSlicer(n_slices=pp.n_slices,
                                              z_cuts=(-pp.z_cut, pp.z_cut))
            slices_list_for_map = bunch_for_map.extract_slices(slicer_for_map)

            #Track the previous part of the machine
            for ele in self.machine.one_turn_map[:i_start_part]:
                for ss in slices_list_for_map:
                    ele.track(ss)

            # Measure optics, track and replace clouds with maps
            list_ele_type = []
            list_meas_beta_x = []
            list_meas_alpha_x = []
            list_meas_beta_y = []
            list_meas_alpha_y = []
            for ele in self.mypart:
                list_ele_type.append(str(type(ele)))
                # Measure optics
                bbb = sum(slices_list_for_map)
                list_meas_beta_x.append(bbb.beta_Twiss_x())
                list_meas_alpha_x.append(bbb.alpha_Twiss_x())
                list_meas_beta_y.append(bbb.beta_Twiss_y())
                list_meas_alpha_y.append(bbb.alpha_Twiss_y())

                if ele in self.my_list_eclouds:
                    ele.track_once_and_replace_with_recorded_field_map(
                        slices_list_for_map)
                else:
                    for ss in slices_list_for_map:
                        ele.track(ss)
            print 'Proc. %d done with maps' % myid

            with open('measured_optics_%d.pkl' % myid, 'wb') as fid:
                pickle.dump(
                    {
                        'ele_type': list_ele_type,
                        'beta_x': list_meas_beta_x,
                        'alpha_x': list_meas_alpha_x,
                        'beta_y': list_meas_beta_y,
                        'alpha_y': list_meas_alpha_y,
                    }, fid)

            #remove RF
            if self.ring_of_CPUs.I_am_the_master:
                self.non_parallel_part.remove(self.machine.longitudinal_map)
Ejemplo n.º 6
0
class Simulation(object):
    def __init__(self):
        self.N_turns = pp.N_turns
        self.pp = pp

    def init_all(self):

        self.n_slices = pp.n_slices

        # read the optics if needed
        if pp.optics_pickle_file is not None:
            with open(pp.optics_pickle_file) as fid:
                optics = pickle.load(fid)
                self.n_kick_smooth = np.sum(
                    ['_kick_smooth_' in nn for nn in optics['name']])
        else:
            optics = None
            self.n_kick_smooth = pp.n_segments

        # define the machine
        from LHC_custom import LHC
        self.machine = LHC(n_segments=pp.n_segments,
                           machine_configuration=pp.machine_configuration,
                           beta_x=pp.beta_x,
                           beta_y=pp.beta_y,
                           accQ_x=pp.Q_x,
                           accQ_y=pp.Q_y,
                           Qp_x=pp.Qp_x,
                           Qp_y=pp.Qp_y,
                           octupole_knob=pp.octupole_knob,
                           optics_dict=optics,
                           V_RF=pp.V_RF)
        self.n_segments = self.machine.transverse_map.n_segments

        # compute sigma
        inj_opt = self.machine.transverse_map.get_injection_optics()
        sigma_x_inj = np.sqrt(inj_opt['beta_x'] * pp.epsn_x /
                              self.machine.betagamma)
        sigma_y_inj = np.sqrt(inj_opt['beta_y'] * pp.epsn_y /
                              self.machine.betagamma)

        if pp.optics_pickle_file is None:
            sigma_x_smooth = sigma_x_inj
            sigma_y_smooth = sigma_y_inj
        else:
            beta_x_smooth = None
            beta_y_smooth = None
            for ele in self.machine.one_turn_map:
                if ele in self.machine.transverse_map:
                    if '_kick_smooth_' in ele.name1:
                        if beta_x_smooth is None:
                            beta_x_smooth = ele.beta_x1
                            beta_y_smooth = ele.beta_y1
                        else:
                            if beta_x_smooth != ele.beta_x1 or beta_y_smooth != ele.beta_y1:
                                raise ValueError(
                                    'Smooth kicks must have all the same beta')

            if beta_x_smooth is None:
                sigma_x_smooth = None
                sigma_y_smooth = None
            else:
                sigma_x_smooth = np.sqrt(beta_x_smooth * pp.epsn_x /
                                         self.machine.betagamma)
                sigma_y_smooth = np.sqrt(beta_y_smooth * pp.epsn_y /
                                         self.machine.betagamma)

        # define MP size
        nel_mp_ref_0 = pp.init_unif_edens_dip * 4 * pp.x_aper * pp.y_aper / pp.N_MP_ele_init_dip

        # prepare e-cloud
        import PyECLOUD.PyEC4PyHT as PyEC4PyHT

        if pp.custom_target_grid_arcs is not None:
            target_grid_arcs = pp.custom_target_grid_arcs
        else:
            target_grid_arcs = {
                'x_min_target':
                -pp.target_size_internal_grid_sigma * sigma_x_smooth,
                'x_max_target':
                pp.target_size_internal_grid_sigma * sigma_x_smooth,
                'y_min_target':
                -pp.target_size_internal_grid_sigma * sigma_y_smooth,
                'y_max_target':
                pp.target_size_internal_grid_sigma * sigma_y_smooth,
                'Dh_target': pp.target_Dh_internal_grid_sigma * sigma_x_smooth
            }
        self.target_grid_arcs = target_grid_arcs

        if pp.enable_arc_dip:
            ecloud_dip = PyEC4PyHT.Ecloud(
                slice_by_slice_mode=True,
                L_ecloud=self.machine.circumference / self.n_kick_smooth *
                pp.fraction_device_dip,
                slicer=None,
                Dt_ref=pp.Dt_ref,
                pyecl_input_folder=pp.pyecl_input_folder,
                chamb_type=pp.chamb_type,
                x_aper=pp.x_aper,
                y_aper=pp.y_aper,
                filename_chm=pp.filename_chm,
                PyPICmode=pp.PyPICmode,
                Dh_sc=pp.Dh_sc_ext,
                N_min_Dh_main=pp.N_min_Dh_main,
                f_telescope=pp.f_telescope,
                N_nodes_discard=pp.N_nodes_discard,
                target_grid=target_grid_arcs,
                init_unif_edens_flag=pp.init_unif_edens_flag_dip,
                init_unif_edens=pp.init_unif_edens_dip,
                N_mp_max=pp.N_mp_max_dip,
                nel_mp_ref_0=nel_mp_ref_0,
                B_multip=pp.B_multip_dip,
                enable_kick_x=pp.enable_kick_x,
                enable_kick_y=pp.enable_kick_y)

        if pp.enable_arc_quad:
            ecloud_quad = PyEC4PyHT.Ecloud(
                slice_by_slice_mode=True,
                L_ecloud=self.machine.circumference / self.n_kick_smooth *
                pp.fraction_device_quad,
                slicer=None,
                Dt_ref=pp.Dt_ref,
                pyecl_input_folder=pp.pyecl_input_folder,
                chamb_type=pp.chamb_type,
                x_aper=pp.x_aper,
                y_aper=pp.y_aper,
                filename_chm=pp.filename_chm,
                PyPICmode=pp.PyPICmode,
                Dh_sc=pp.Dh_sc_ext,
                N_min_Dh_main=pp.N_min_Dh_main,
                f_telescope=pp.f_telescope,
                N_nodes_discard=pp.N_nodes_discard,
                target_grid=target_grid_arcs,
                N_mp_max=pp.N_mp_max_quad,
                nel_mp_ref_0=nel_mp_ref_0,
                B_multip=pp.B_multip_quad,
                filename_init_MP_state=pp.filename_init_MP_state_quad,
                enable_kick_x=pp.enable_kick_x,
                enable_kick_y=pp.enable_kick_y)

        if self.ring_of_CPUs.I_am_the_master and pp.enable_arc_dip:
            with open('multigrid_config_dip.txt', 'w') as fid:
                if hasattr(ecloud_dip.spacech_ele.PyPICobj, 'grids'):
                    fid.write(repr(ecloud_dip.spacech_ele.PyPICobj.grids))
                else:
                    fid.write("Single grid.")

            with open('multigrid_config_dip.pkl', 'w') as fid:
                if hasattr(ecloud_dip.spacech_ele.PyPICobj, 'grids'):
                    pickle.dump(ecloud_dip.spacech_ele.PyPICobj.grids, fid)
                else:
                    pickle.dump('Single grid.', fid)

        if self.ring_of_CPUs.I_am_the_master and pp.enable_arc_quad:
            with open('multigrid_config_quad.txt', 'w') as fid:
                if hasattr(ecloud_quad.spacech_ele.PyPICobj, 'grids'):
                    fid.write(repr(ecloud_quad.spacech_ele.PyPICobj.grids))
                else:
                    fid.write("Single grid.")

            with open('multigrid_config_quad.pkl', 'w') as fid:
                if hasattr(ecloud_quad.spacech_ele.PyPICobj, 'grids'):
                    pickle.dump(ecloud_quad.spacech_ele.PyPICobj.grids, fid)
                else:
                    pickle.dump('Single grid.', fid)

        # setup transverse losses (to "protect" the ecloud)
        import PyHEADTAIL.aperture.aperture as aperture
        apt_xy = aperture.EllipticalApertureXY(
            x_aper=pp.target_size_internal_grid_sigma * sigma_x_inj,
            y_aper=pp.target_size_internal_grid_sigma * sigma_y_inj)
        self.machine.one_turn_map.append(apt_xy)

        if pp.enable_transverse_damper:
            # setup transverse damper
            from PyHEADTAIL.feedback.transverse_damper import TransverseDamper
            damper = TransverseDamper(dampingrate_x=pp.dampingrate_x,
                                      dampingrate_y=pp.dampingrate_y)
            self.machine.one_turn_map.append(damper)

        # We suppose that all the object that cannot be slice parallelized are at the end of the ring
        i_end_parallel = len(
            self.machine.one_turn_map) - pp.n_non_parallelizable

        # split the machine
        sharing = shs.ShareSegments(i_end_parallel, self.ring_of_CPUs.N_nodes)
        myid = self.ring_of_CPUs.myid
        i_start_part, i_end_part = sharing.my_part(myid)
        self.mypart = self.machine.one_turn_map[i_start_part:i_end_part]
        if self.ring_of_CPUs.I_am_a_worker:
            print 'I am id=%d/%d (worker) and my part is %d long' % (
                myid, self.ring_of_CPUs.N_nodes, len(self.mypart))
        elif self.ring_of_CPUs.I_am_the_master:
            self.non_parallel_part = self.machine.one_turn_map[i_end_parallel:]
            print 'I am id=%d/%d (master) and my part is %d long' % (
                myid, self.ring_of_CPUs.N_nodes, len(self.mypart))

        #install eclouds in my part
        my_new_part = []
        self.my_list_eclouds = []
        for ele in self.mypart:
            my_new_part.append(ele)
            if ele in self.machine.transverse_map:
                if pp.optics_pickle_file is None or '_kick_smooth_' in ele.name1:
                    if pp.enable_arc_dip:
                        ecloud_dip_new = ecloud_dip.generate_twin_ecloud_with_shared_space_charge(
                        )
                        my_new_part.append(ecloud_dip_new)
                        self.my_list_eclouds.append(ecloud_dip_new)
                    if pp.enable_arc_quad:
                        ecloud_quad_new = ecloud_quad.generate_twin_ecloud_with_shared_space_charge(
                        )
                        my_new_part.append(ecloud_quad_new)
                        self.my_list_eclouds.append(ecloud_quad_new)
                elif '_kick_element_' in ele.name1 and pp.enable_eclouds_at_kick_elements:

                    i_in_optics = list(optics['name']).index(ele.name1)
                    kick_name = optics['name'][i_in_optics]
                    element_name = kick_name.split('_kick_element_')[-1]
                    L_curr = optics['L_interaction'][i_in_optics]

                    buildup_folder = pp.path_buildup_simulations_kick_elements.replace(
                        '!!!NAME!!!', element_name)
                    chamber_fname = '%s_chamber.mat' % (element_name)

                    B_multip_curr = [0., optics['gradB'][i_in_optics]]

                    x_beam_offset = optics['x'][i_in_optics] * pp.orbit_factor
                    y_beam_offset = optics['y'][i_in_optics] * pp.orbit_factor

                    sigma_x_local = np.sqrt(optics['beta_x'][i_in_optics] *
                                            pp.epsn_x / self.machine.betagamma)
                    sigma_y_local = np.sqrt(optics['beta_y'][i_in_optics] *
                                            pp.epsn_y / self.machine.betagamma)

                    ecloud_ele = PyEC4PyHT.Ecloud(
                        slice_by_slice_mode=True,
                        L_ecloud=L_curr,
                        slicer=None,
                        Dt_ref=pp.Dt_ref,
                        pyecl_input_folder=pp.pyecl_input_folder,
                        chamb_type='polyg',
                        x_aper=None,
                        y_aper=None,
                        filename_chm=buildup_folder + '/' + chamber_fname,
                        PyPICmode=pp.PyPICmode,
                        Dh_sc=pp.Dh_sc_ext,
                        N_min_Dh_main=pp.N_min_Dh_main,
                        f_telescope=pp.f_telescope,
                        N_nodes_discard=pp.N_nodes_discard,
                        target_grid={
                            'x_min_target':
                            -pp.target_size_internal_grid_sigma * sigma_x_local
                            + x_beam_offset,
                            'x_max_target':
                            pp.target_size_internal_grid_sigma * sigma_x_local
                            + x_beam_offset,
                            'y_min_target':
                            -pp.target_size_internal_grid_sigma * sigma_y_local
                            + y_beam_offset,
                            'y_max_target':
                            pp.target_size_internal_grid_sigma * sigma_y_local
                            + y_beam_offset,
                            'Dh_target':
                            pp.target_Dh_internal_grid_sigma * sigma_y_local
                        },
                        N_mp_max=pp.N_mp_max_quad,
                        nel_mp_ref_0=nel_mp_ref_0,
                        B_multip=B_multip_curr,
                        filename_init_MP_state=buildup_folder + '/' +
                        pp.name_MP_state_file_kick_elements,
                        x_beam_offset=x_beam_offset,
                        y_beam_offset=y_beam_offset,
                        enable_kick_x=pp.enable_kick_x,
                        enable_kick_y=pp.enable_kick_y)

                    my_new_part.append(ecloud_ele)
                    self.my_list_eclouds.append(ecloud_ele)

        self.mypart = my_new_part

        if pp.footprint_mode:
            print 'Proc. %d computing maps' % myid
            # generate a bunch
            bunch_for_map = self.machine.generate_6D_Gaussian_bunch_matched(
                n_macroparticles=pp.n_macroparticles_for_footprint_map,
                intensity=pp.intensity,
                epsn_x=pp.epsn_x,
                epsn_y=pp.epsn_y,
                sigma_z=pp.sigma_z)

            # Slice the bunch
            slicer_for_map = UniformBinSlicer(n_slices=pp.n_slices,
                                              z_cuts=(-pp.z_cut, pp.z_cut))
            slices_list_for_map = bunch_for_map.extract_slices(slicer_for_map)

            #Track the previous part of the machine
            for ele in self.machine.one_turn_map[:i_start_part]:
                for ss in slices_list_for_map:
                    ele.track(ss)

            # Measure optics, track and replace clouds with maps
            list_ele_type = []
            list_meas_beta_x = []
            list_meas_alpha_x = []
            list_meas_beta_y = []
            list_meas_alpha_y = []
            for ele in self.mypart:
                list_ele_type.append(str(type(ele)))
                # Measure optics
                bbb = sum(slices_list_for_map)
                list_meas_beta_x.append(bbb.beta_Twiss_x())
                list_meas_alpha_x.append(bbb.alpha_Twiss_x())
                list_meas_beta_y.append(bbb.beta_Twiss_y())
                list_meas_alpha_y.append(bbb.alpha_Twiss_y())

                if ele in self.my_list_eclouds:
                    ele.track_once_and_replace_with_recorded_field_map(
                        slices_list_for_map)
                else:
                    for ss in slices_list_for_map:
                        ele.track(ss)
            print 'Proc. %d done with maps' % myid

            with open('measured_optics_%d.pkl' % myid, 'wb') as fid:
                pickle.dump(
                    {
                        'ele_type': list_ele_type,
                        'beta_x': list_meas_beta_x,
                        'alpha_x': list_meas_alpha_x,
                        'beta_y': list_meas_beta_y,
                        'alpha_y': list_meas_alpha_y,
                    }, fid)

            #remove RF
            if self.ring_of_CPUs.I_am_the_master:
                self.non_parallel_part.remove(self.machine.longitudinal_map)

    def init_master(self):

        # Manage multi-job operation
        if pp.footprint_mode:
            if pp.N_turns != pp.N_turns_target:
                raise ValueError(
                    'In footprint mode you need to set N_turns_target=N_turns_per_run!'
                )

        import PyPARIS_sim_class.Save_Load_Status as SLS
        SimSt = SLS.SimulationStatus(N_turns_per_run=pp.N_turns,
                                     check_for_resubmit=True,
                                     N_turns_target=pp.N_turns_target)
        SimSt.before_simulation()
        self.SimSt = SimSt

        # generate a bunch
        if pp.footprint_mode:
            self.bunch = self.machine.generate_6D_Gaussian_bunch_matched(
                n_macroparticles=pp.n_macroparticles_for_footprint_track,
                intensity=pp.intensity,
                epsn_x=pp.epsn_x,
                epsn_y=pp.epsn_y,
                sigma_z=pp.sigma_z)
        elif SimSt.first_run:

            if pp.bunch_from_file is not None:
                print 'Loading bunch from file %s ...' % pp.bunch_from_file
                with h5py.File(pp.bunch_from_file, 'r') as fid:
                    self.bunch = self.buffer_to_piece(
                        np.array(fid['bunch']).copy())
                print 'Bunch loaded from file.\n'

            else:
                self.bunch = self.machine.generate_6D_Gaussian_bunch_matched(
                    n_macroparticles=pp.n_macroparticles,
                    intensity=pp.intensity,
                    epsn_x=pp.epsn_x,
                    epsn_y=pp.epsn_y,
                    sigma_z=pp.sigma_z)

                # compute initial displacements
                inj_opt = self.machine.transverse_map.get_injection_optics()
                sigma_x = np.sqrt(inj_opt['beta_x'] * pp.epsn_x /
                                  self.machine.betagamma)
                sigma_y = np.sqrt(inj_opt['beta_y'] * pp.epsn_y /
                                  self.machine.betagamma)
                x_kick = pp.x_kick_in_sigmas * sigma_x
                y_kick = pp.y_kick_in_sigmas * sigma_y

                # apply initial displacement
                if not pp.footprint_mode:
                    self.bunch.x += x_kick
                    self.bunch.y += y_kick

                print 'Bunch initialized.'
        else:
            print 'Loading bunch from file...'
            with h5py.File(
                    'bunch_status_part%02d.h5' %
                (SimSt.present_simulation_part - 1), 'r') as fid:
                self.bunch = self.buffer_to_piece(
                    np.array(fid['bunch']).copy())
            print 'Bunch loaded from file.'

        # initial slicing
        self.slicer = UniformBinSlicer(n_slices=pp.n_slices,
                                       z_cuts=(-pp.z_cut, pp.z_cut))

        # define a bunch monitor
        from PyHEADTAIL.monitors.monitors import BunchMonitor
        self.bunch_monitor = BunchMonitor(
            'bunch_evolution_%02d' % self.SimSt.present_simulation_part,
            pp.N_turns, {'Comment': 'PyHDTL simulation'},
            write_buffer_every=3)

        # define a slice monitor
        from PyHEADTAIL.monitors.monitors import SliceMonitor
        self.slice_monitor = SliceMonitor(
            'slice_evolution_%02d' % self.SimSt.present_simulation_part,
            pp.N_turns,
            self.slicer, {'Comment': 'PyHDTL simulation'},
            write_buffer_every=3)

        #slice for the first turn
        slice_obj_list = self.bunch.extract_slices(self.slicer)

        pieces_to_be_treated = slice_obj_list

        print 'N_turns', self.N_turns

        if pp.footprint_mode:
            self.recorded_particles = ParticleTrajectories(
                pp.n_macroparticles_for_footprint_track, self.N_turns)

        return pieces_to_be_treated

    def init_worker(self):
        pass

    def treat_piece(self, piece):
        for ele in self.mypart:
            ele.track(piece)

    def finalize_turn_on_master(self, pieces_treated):

        # re-merge bunch
        self.bunch = sum(pieces_treated)

        #finalize present turn (with non parallel part, e.g. synchrotron motion)
        for ele in self.non_parallel_part:
            ele.track(self.bunch)

        # save results
        #print '%s Turn %d'%(time.strftime("%d/%m/%Y %H:%M:%S", time.localtime()), i_turn)
        self.bunch_monitor.dump(self.bunch)
        self.slice_monitor.dump(self.bunch)

        # prepare next turn (re-slice)
        new_pieces_to_be_treated = self.bunch.extract_slices(self.slicer)

        # order reset of all clouds
        orders_to_pass = ['reset_clouds']

        if pp.footprint_mode:
            self.recorded_particles.dump(self.bunch)

        # check if simulation has to be stopped
        # 1. for beam losses
        if not pp.footprint_mode and self.bunch.macroparticlenumber < pp.sim_stop_frac * pp.n_macroparticles:
            orders_to_pass.append('stop')
            self.SimSt.check_for_resubmit = False
            print 'Stop simulation due to beam losses.'

        # 2. for the emittance growth
        if pp.flag_check_emittance_growth:
            epsn_x_max = (pp.epsn_x) * (1 + pp.epsn_x_max_growth_fraction)
            epsn_y_max = (pp.epsn_y) * (1 + pp.epsn_y_max_growth_fraction)
            if not pp.footprint_mode and (self.bunch.epsn_x() > epsn_x_max
                                          or self.bunch.epsn_y() > epsn_y_max):
                orders_to_pass.append('stop')
                self.SimSt.check_for_resubmit = False
                print 'Stop simulation due to emittance growth.'

        return orders_to_pass, new_pieces_to_be_treated

    def execute_orders_from_master(self, orders_from_master):
        if 'reset_clouds' in orders_from_master:
            for ec in self.my_list_eclouds:
                ec.finalize_and_reinitialize()

    def finalize_simulation(self):
        if pp.footprint_mode:
            # Tunes

            import NAFFlib
            print 'NAFFlib spectral analysis...'
            qx_i = np.empty_like(self.recorded_particles.x_i[:, 0])
            qy_i = np.empty_like(self.recorded_particles.x_i[:, 0])
            for ii in range(len(qx_i)):
                qx_i[ii] = NAFFlib.get_tune(self.recorded_particles.x_i[ii] +
                                            1j *
                                            self.recorded_particles.xp_i[ii])
                qy_i[ii] = NAFFlib.get_tune(self.recorded_particles.y_i[ii] +
                                            1j *
                                            self.recorded_particles.yp_i[ii])
            print 'NAFFlib spectral analysis done.'

            # Save
            import h5py
            dict_beam_status = {\
            'x_init': np.squeeze(self.recorded_particles.x_i[:,0]),
            'xp_init': np.squeeze(self.recorded_particles.xp_i[:,0]),
            'y_init': np.squeeze(self.recorded_particles.y_i[:,0]),
            'yp_init': np.squeeze(self.recorded_particles.yp_i[:,0]),
            'z_init': np.squeeze(self.recorded_particles.z_i[:,0]),
            'qx_i': qx_i,
            'qy_i': qy_i,
            'x_centroid': np.mean(self.recorded_particles.x_i, axis=1),
            'y_centroid': np.mean(self.recorded_particles.y_i, axis=1)}

            with h5py.File('footprint.h5', 'w') as fid:
                for kk in dict_beam_status.keys():
                    fid[kk] = dict_beam_status[kk]
        else:
            #save data for multijob operation and launch new job
            import h5py
            with h5py.File(
                    'bunch_status_part%02d.h5' %
                (self.SimSt.present_simulation_part), 'w') as fid:
                fid['bunch'] = self.piece_to_buffer(self.bunch)
            if not self.SimSt.first_run:
                os.system('rm bunch_status_part%02d.h5' %
                          (self.SimSt.present_simulation_part - 1))
            self.SimSt.after_simulation()

    def piece_to_buffer(self, piece):
        buf = ch.beam_2_buffer(piece)
        return buf

    def buffer_to_piece(self, buf):
        piece = ch.buffer_2_beam(buf)
        return piece
    def init_all(self):
        
        print('Exec init...')
        
        from LHC_custom import LHC
        self.machine = LHC(n_segments = n_segments, machine_configuration = machine_configuration,
                        Qp_x=Qp_x, Qp_y=Qp_y,
                        octupole_knob=octupole_knob)
        self.n_non_parallelizable = 1 #RF

        inj_optics = self.machine.transverse_map.get_injection_optics()
        sigma_x_smooth = np.sqrt(inj_optics['beta_x']*epsn_x/self.machine.betagamma)
        sigma_y_smooth = np.sqrt(inj_optics['beta_y']*epsn_y/self.machine.betagamma)

        if flag_aperture:
            # setup transverse losses (to "protect" the ecloud)
            import PyHEADTAIL.aperture.aperture as aperture
            apt_xy = aperture.EllipticalApertureXY(x_aper=target_size_internal_grid_sigma*sigma_x_smooth, 
                                                   y_aper=target_size_internal_grid_sigma*sigma_x_smooth)
            self.machine.one_turn_map.append(apt_xy)
            self.n_non_parallelizable +=1 

        if enable_transverse_damper:
            # setup transverse damper
            from PyHEADTAIL.feedback.transverse_damper import TransverseDamper
            damper = TransverseDamper(dampingrate_x=dampingrate_x, dampingrate_y=dampingrate_y)
            self.machine.one_turn_map.append(damper)
            self.n_non_parallelizable +=1
            
        if enable_ecloud:
            print('Build ecloud...')
            import PyECLOUD.PyEC4PyHT as PyEC4PyHT
            ecloud = PyEC4PyHT.Ecloud(
                    L_ecloud=L_ecloud_tot/n_segments, slicer=None, slice_by_slice_mode=True,
                    Dt_ref=5e-12, pyecl_input_folder='./pyecloud_config',
                    chamb_type = 'polyg' ,
                    filename_chm= 'LHC_chm_ver.mat', 
                    #init_unif_edens_flag=1,
                    #init_unif_edens=1e7,
                    #N_mp_max = 3000000,
                    #nel_mp_ref_0 = 1e7/(0.7*3000000),
                    #B_multip = [0.],
                    #~ PyPICmode = 'ShortleyWeller_WithTelescopicGrids',
                    #~ f_telescope = 0.3,
                    target_grid = {'x_min_target':-target_size_internal_grid_sigma*sigma_x_smooth, 'x_max_target':target_size_internal_grid_sigma*sigma_x_smooth,
                                   'y_min_target':-target_size_internal_grid_sigma*sigma_y_smooth,'y_max_target':target_size_internal_grid_sigma*sigma_y_smooth,
                                   'Dh_target':.2*sigma_x_smooth},
                    #~ N_nodes_discard = 10.,
                    #~ N_min_Dh_main = 10,
                    #x_beam_offset = x_beam_offset,
                    #y_beam_offset = y_beam_offset,
                    #probes_position = probes_position,
                    save_pyecl_outp_as = 'cloud_evol_ring%d'%self.ring_of_CPUs.myring,
                    save_only = ['lam_t_array', 'nel_hist', 'Nel_timep', 't', 't_hist', 'xg_hist'],
                    sparse_solver = 'PyKLU', enable_kick_x=enable_kick_x, enable_kick_y=enable_kick_y)
            print('Done.')



        # split the machine
        i_end_parallel = len(self.machine.one_turn_map)-self.n_non_parallelizable
        sharing = shs.ShareSegments(i_end_parallel, self.ring_of_CPUs.N_nodes_per_ring)
        i_start_part, i_end_part = sharing.my_part(self.ring_of_CPUs.myid_in_ring)
        self.mypart = self.machine.one_turn_map[i_start_part:i_end_part]

        if self.ring_of_CPUs.I_am_at_end_ring:
            self.non_parallel_part = self.machine.one_turn_map[i_end_parallel:]
            

        #install eclouds in my part
        if enable_ecloud:
            my_new_part = []
            self.my_list_eclouds = []
            for ele in self.mypart:
                if ele in self.machine.transverse_map:
                    ecloud_new = ecloud.generate_twin_ecloud_with_shared_space_charge()
                    
                    # we save buildup info only for the first cloud in each ring
                    if self.ring_of_CPUs.myid_in_ring>0 or len(self.my_list_eclouds)>0:
                        ecloud_new.remove_savers()
                    
                    my_new_part.append(ecloud_new)
                    self.my_list_eclouds.append(ecloud_new)
                my_new_part.append(ele)

            self.mypart = my_new_part
            
            print('Hello, I am %d.%d, my part looks like: %s. Saver status: %s'%(
                self.ring_of_CPUs.myring, self.ring_of_CPUs.myid_in_ring, self.mypart, 
                [(ec.cloudsim.cloud_list[0].pyeclsaver is not None) for ec in self.my_list_eclouds]))
class Simulation(object):
    def __init__(self):
        self.N_turns = N_turns

    def init_all(self):

        self.n_slices = n_slices
        self.n_segments = n_segments

        # define the machine
        from LHC_custom import LHC
        self.machine = LHC(n_segments=n_segments,
                           machine_configuration=machine_configuration)

        # define MP size
        nel_mp_ref_0 = init_unif_edens * 4 * x_aper * y_aper / N_MP_ele_init

        # prepare e-cloud
        import PyECLOUD.PyEC4PyHT as PyEC4PyHT
        ecloud = PyEC4PyHT.Ecloud(
            slice_by_slice_mode=True,
            L_ecloud=self.machine.circumference / n_segments,
            slicer=None,
            Dt_ref=Dt_ref,
            pyecl_input_folder=pyecl_input_folder,
            chamb_type=chamb_type,
            x_aper=x_aper,
            y_aper=y_aper,
            filename_chm=filename_chm,
            Dh_sc=Dh_sc,
            init_unif_edens_flag=init_unif_edens_flag,
            init_unif_edens=init_unif_edens,
            N_mp_max=N_mp_max,
            nel_mp_ref_0=nel_mp_ref_0,
            B_multip=B_multip_per_eV * self.machine.p0 / e * c)

        # setup transverse losses (to "protect" the ecloud)
        import PyHEADTAIL.aperture.aperture as aperture
        apt_xy = aperture.EllipticalApertureXY(
            x_aper=ecloud.impact_man.chamb.x_aper,
            y_aper=ecloud.impact_man.chamb.y_aper)
        self.machine.one_turn_map.append(apt_xy)

        n_non_parallelizable = 2  #rf and aperture

        # We suppose that all the object that cannot be slice parallelized are at the end of the ring
        i_end_parallel = len(self.machine.one_turn_map) - n_non_parallelizable

        # split the machine
        sharing = shs.ShareSegments(i_end_parallel, self.ring_of_CPUs.N_nodes)
        myid = self.ring_of_CPUs.myid
        i_start_part, i_end_part = sharing.my_part(myid)
        self.mypart = self.machine.one_turn_map[i_start_part:i_end_part]
        if self.ring_of_CPUs.I_am_a_worker:
            print 'I am id=%d/%d (worker) and my part is %d long' % (
                myid, self.ring_of_CPUs.N_nodes, len(self.mypart))
        elif self.ring_of_CPUs.I_am_the_master:
            self.non_parallel_part = self.machine.one_turn_map[i_end_parallel:]
            print 'I am id=%d/%d (master) and my part is %d long' % (
                myid, self.ring_of_CPUs.N_nodes, len(self.mypart))

        #install eclouds in my part
        my_new_part = []
        self.my_list_eclouds = []
        for ele in self.mypart:
            my_new_part.append(ele)
            if ele in self.machine.transverse_map:
                ecloud_new = ecloud.generate_twin_ecloud_with_shared_space_charge(
                )
                my_new_part.append(ecloud_new)
                self.my_list_eclouds.append(ecloud_new)
        self.mypart = my_new_part

    def init_master(self):

        # generate a bunch
        bunch = self.machine.generate_6D_Gaussian_bunch_matched(
            n_macroparticles=n_macroparticles,
            intensity=intensity,
            epsn_x=epsn_x,
            epsn_y=epsn_y,
            sigma_z=sigma_z)
        print 'Bunch initialized.'

        # initial slicing
        from PyHEADTAIL.particles.slicing import UniformBinSlicer
        self.slicer = UniformBinSlicer(n_slices=n_slices, n_sigma_z=n_sigma_z)

        # compute initial displacements
        inj_opt = self.machine.transverse_map.get_injection_optics()
        sigma_x = np.sqrt(inj_opt['beta_x'] * epsn_x / self.machine.betagamma)
        sigma_y = np.sqrt(inj_opt['beta_y'] * epsn_y / self.machine.betagamma)
        x_kick = x_kick_in_sigmas * sigma_x
        y_kick = y_kick_in_sigmas * sigma_y

        # apply initial displacement
        bunch.x += x_kick
        bunch.y += y_kick

        # define a bunch monitor
        from PyHEADTAIL.monitors.monitors import BunchMonitor
        self.bunch_monitor = BunchMonitor('bunch_evolution',
                                          N_turns,
                                          {'Comment': 'PyHDTL simulation'},
                                          write_buffer_every=8)

        #slice for the first turn
        slice_obj_list = bunch.extract_slices(self.slicer)

        pieces_to_be_treated = slice_obj_list

        print 'N_turns', self.N_turns

        return pieces_to_be_treated

    def init_worker(self):
        pass

    def treat_piece(self, piece):
        for ele in self.mypart:
            ele.track(piece)

    def finalize_turn_on_master(self, pieces_treated):

        # re-merge bunch
        bunch = sum(pieces_treated)

        #finalize present turn (with non parallel part, e.g. synchrotron motion)
        for ele in self.non_parallel_part:
            ele.track(bunch)

        # save results
        #print '%s Turn %d'%(time.strftime("%d/%m/%Y %H:%M:%S", time.localtime()), i_turn)
        self.bunch_monitor.dump(bunch)

        # prepare next turn (re-slice)
        new_pieces_to_be_treated = bunch.extract_slices(self.slicer)
        orders_to_pass = ['reset_clouds']

        return orders_to_pass, new_pieces_to_be_treated

    def execute_orders_from_master(self, orders_from_master):
        if 'reset_clouds' in orders_from_master:
            for ec in self.my_list_eclouds:
                ec.finalize_and_reinitialize()

    def finalize_simulation(self):
        pass

    def piece_to_buffer(self, piece):
        buf = ch.beam_2_buffer(piece)
        return buf

    def buffer_to_piece(self, buf):
        piece = ch.buffer_2_beam(buf)
        return piece
Ejemplo n.º 9
0
import sys
sys.path.append('../../../../')

from scipy.constants import c as clight, e as qe
import matplotlib.pyplot as plt
import numpy as np

import PyECLOUD.PyEC4PyHT as PyEC4PyHT
from PyHEADTAIL.particles.slicing import UniformBinSlicer
import PyECLOUD.mystyle as ms

from LHC_custom import LHC

machine_configuration = 'HLLHC-injection'
machine = LHC(n_segments=1, machine_configuration=machine_configuration)

bunch = machine.generate_6D_Gaussian_bunch(n_macroparticles=300000,
                                           intensity=1.15e11,
                                           epsn_x=2.5e-6,
                                           epsn_y=2.5e-6,
                                           sigma_z=0.11)

bunch.x[bunch.z < 5e-2] += 1e-3

ecloud_ele = PyEC4PyHT.Ecloud(
    slice_by_slice_mode=True,
    L_ecloud=1.,
    slicer=None,
    Dt_ref=25e-12,
    pyecl_input_folder='pyecloud_config',
)