from pylab import *;
from pydao.physics import Wave,CystalDiffraction,CrystalPlane,Lattice;
############################
# Here is pretty much all the inputs
phic = 210/180.*pi;
index = (1,0,6);
photoenergy = 12e3*1.6e-19
##########################################
## First we setup the diffraction plane
a=6.;
b=6.;
c=11.7;
la = Lattice();
basis=la.length_angle_2basis([a,b,c],[90.,90.,120.]);
la.set('basis',basis);
plane = CrystalPlane(lattice=la,index=index);
plane.plot();
###########################################
# Then the energy of the diffraction wave
wave = Wave(type='EM',energy = photoenergy);
###########################################
# Align the diffraction plane and the wave using the assigned phic or thetac
dif = CystalDiffraction(plane = plane, incidentwave = wave);
theta = dif.cal_theta();
print "2theta:",theta*2*180/pi;
incident = dif.align_incident(phic = phic);
from pylab import *
from pydao.physics import Wave, CystalDiffraction, CrystalPlane, Lattice
############################
# Here is pretty much all the inputs
phic = 210 / 180. * pi
index = (1, 0, 6)
photoenergy = 12e3 * 1.6e-19
##########################################
## First we setup the diffraction plane
a = 6.
b = 6.
c = 11.7
la = Lattice()
basis = la.length_angle_2basis([a, b, c], [90., 90., 120.])
la.set('basis', basis)
plane = CrystalPlane(lattice=la, index=index)
plane.plot()
###########################################
# Then the energy of the diffraction wave
wave = Wave(type='EM', energy=photoenergy)
###########################################
# Align the diffraction plane and the wave using the assigned phic or thetac
dif = CystalDiffraction(plane=plane, incidentwave=wave)
theta = dif.cal_theta()
print "2theta:", theta * 2 * 180 / pi
incident = dif.align_incident(phic=phic)
wavelength = 6.64e-34 * 3e8 / E / 1.6e-19 * 1e10
# wave length in angstrom
k_photon = 2 * pi / wavelength
#########################################
# the lattice and unit cell in real space
a = 6.
b = 6.
c = 11.7
a_axis = array([1., 0., 0.]) * a
b_axis = array([-0.5, sqrt(3) / 2, 0.]) * b
c_axis = array([0., 0., 1.]) * c
axis = array([a_axis, b_axis, c_axis])
la = Lattice(basis=axis)
at = Atom()
at.set('position', zeros(3))
la.plot3d_basis(labelwidth=0.01)
surfacenormal = array([0, 0, 1])
#########################################
# the k-space and diffraction plane
la.cal_kbasis()
kbasis = la.get('kbasis')
planenormal = h * kbasis[0] + k * kbasis[1] + l * kbasis[2]
theta = arcsin(vlen(planenormal) / k_photon / 2)
##########################################
#angle between diffraction plane and surface
E = 12e3; # photon energy in eV
wavelength = 6.64e-34*3e8/E/1.6e-19*1e10; # wave length in angstrom
k_photon = 2*pi/wavelength;
#########################################
# the lattice and unit cell in real space
a=6.;
b=6.;
c=11.7;
a_axis=array([1.,0.,0.])*a;
b_axis=array([-0.5,sqrt(3)/2,0.])*b;
c_axis=array([0.,0.,1.])*c;
axis=array([a_axis,b_axis,c_axis]);
la=Lattice(basis=axis);
at=Atom();
at.set('position',zeros(3));
la.plot3d_basis(labelwidth = 0.01);
surfacenormal=array([0,0,1])
#########################################
# the k-space and diffraction plane
la.cal_kbasis();
kbasis=la.get('kbasis');
planenormal = h*kbasis[0]+k*kbasis[1]+l*kbasis[2];
theta = arcsin(vlen(planenormal)/k_photon/2);
##########################################
#angle between diffraction plane and surface