def make6DEllipticalBeam(lattice_file,lattice_name):
'''Constructs a coasting elliptic beam with Gaussian longitduinal distribution and stores it in a Synergia bunch.
A lattice file is required, as Synergia constructs the bunch relative to the reference particle as specified in mad-x.
Arguments:
lattice_file - A .madx file which stores the lattice
lattice_name - The sequence name within the madx file
'''
#import lattice and construct options object
#load lattice
lattice = synergia.lattice.MadX_reader().get_lattice(lattice_name,lattice_file)
length = lattice.get_length()
ref = lattice.get_reference_particle() #reference particle
ds = 0.01
#nsteps = int(length/ds) +1 #calculate # of steps to take per turn
#nsteps_per_element = nsteps/len(lattice.get_elements()) #not this isn't using future division, so returns int
nsteps_per_element = 10 #hardcoded for IOTA nl elements
nsteps = len(lattice.get_elements())*nsteps_per_element
name = 'lattice_1IO_NL_Center'
order = 1
outputdir = 'order_'+str(order)+'_'+name
opts = workflow.make_opts(name, order, outputdir, nsteps, nsteps_per_element)
opts.macro_particles=1000
opts.emitx = 7.0e-6
workflow.make_path(outputdir)
#make lattice chef propagating
latticework.make_chef(lattice)
stepper = synergia.simulation.Independent_stepper_elements(lattice, opts.map_order, opts.steps_per_element)
lattice_simulator = stepper.get_lattice_simulator()
#lattice_simulator = synergia.simulation.Lattice_simulator(lattice,opts.map_order)
#construct bunch array and write it to a textfile
EllipticalBeam6D(opts)
#read in the file and construct a synergia bunch
particles_file = 'myBunch.txt'
comm = synergia.utils.Commxx(True)
bucket_length = lattice_simulator.get_bucket_length()
bucket_length = 0.05 #potential workaround
myBunch = read_bunch.read_bunch(particles_file, ref, opts.real_particles, bucket_length, comm, verbose=False)
return opts, lattice, lattice_simulator, stepper, myBunch
rp_perlength = current/(beta*scipy.constants.c*scipy.constants.e)
real_particles = rp_perlength*bunch_length
#real_particles = np.round(current*bunch_length/(beta*scipy.constants.c*scipy.constants.e))
#current = (14./400)*1.e-3 #mA of current
#blt = bunch_length/(beta*scipy.constants.c) #temporal length of bunch
#real_particles = np.round((current*blt)/scipy.constants.e)
opts.real_particles = real_particles
print "Approximating a current of {}A using {} particles".format(current,opts.real_particles)
#totalQ = opts.real_particles*scipy.constants.e
bucket_length = beta*lattice.get_length()/4 #RF harmonic number is 4
particles_file = 'myBunch.txt'
myBunch = read_bunch.read_bunch(particles_file, reference_particle, opts.real_particles, bucket_length, comm)
#============================ Finished acquiring a bunch =====================
#================== set up the output diagnostics by creating the bunch_simulator =============
bunch_simulator = synergia.simulation.Bunch_simulator(myBunch)
#basic diagnostics - PER STEP
basicdiag = synergia.bunch.Diagnostics_basic("basic.h5", opts.output_dir)
bunch_simulator.add_per_step(basicdiag)
print >>logger, "saving basic diagnostics each step"
#include full diagnostics
#import lattice and construct options object
#load lattice
lattice = synergia.lattice.MadX_reader().get_lattice("iota", "/Users/ncook/Synergia_Tests/lattices/Iota6-6/lattice_2IO_nll.madx")
length = lattice.get_length()
ref = lattice.get_reference_particle() #reference particle
ds = 0.01
nsteps = int(length/ds) +1 #calculate # of steps to take per turn
nsteps_per_element = nsteps/len(lattice.get_elements()) #not this isn't using future division, so returns int
name = 'lattice_2IO_NL'
order = 1
outputdir = 'order_'+str(order)+'_'+name
opts = workflow.make_opts(name, order, outputdir, nsteps, nsteps_per_element)
opts.macro_particles=1000
opts.emitx = 1.0e-5
#workflow.make_path(outputdir)
lattice_simulator = synergia.simulation.Lattice_simulator(lattice,opts.map_order)
#construct bunch array and write it to a textfile
EllipticBeam6D.EllipticalBeam6D(opts)
#read in the file and construct a synergia bunch
particles_file = 'myBunch.txt'
comm = synergia.utils.Commxx(True)
bucket_length = lattice_simulator.get_bucket_length()
myBunch = read_bunch.read_bunch(particles_file, ref, opts.real_particles, bucket_length, comm, verbose=False)