About McStas Download Documentation 
[ Identification  Description  Input parameters  Output parameters  Links ] The
A Doublecylinder shaped allincoherent scatterer
with elastic, quasielastic (Lorentzian), and tunneling (sharp)
components.

Name  Unit  Description  Default 

thickness  m  Thickness of cylindrical sample in (x,z) plane  0 
radius  m  Outer radius of sample in (x,z) plane  0.01 
focus_r  m  Radius of disk containing target. Use 0 for full space  0 
p_interact  1  MC Probability for scattering the ray; otherwise transmit  1 
f_QE  1  Fraction of quasielastic scattering  0 
f_tun  1  Fraction of tunneling scattering (f_QE+f_tun < 1)  0 
gamma  meV  Lorentzian width of quasielastic broadening (HWHM)  0 
E_tun  meV  Tunneling energy  0 
target_x    0  
target_y  m  position of target to focus at  0 
target_z    0.235  
focus_xw  m  horiz. dimension of a rectangular area  0 
focus_yh  m  vert. dimension of a rectangular area  0 
focus_aw  deg  horiz. angular dimension of a rectangular area  0 
focus_ah  deg  vert. angular dimension of a rectangular area  0 
xwidth  m  horiz. dimension of sample, as a width  0 
yheight  m  vert. dimension of sample, as a height  0.05 
zdepth  m  depth of sample  0 
sigma_abs  barns  Absorbtion cross section pr. unit cell  5.08 
sigma_inc  barns  Total incoherent scattering cross section pr. unit cell  4.935 
Vc  AA^3  Unit cell volume  13.827 
target_index  1  relative index of component to focus at, e.g. next is +1  0 
Tunneling_sample.comp
.
[ Identification  Description  Input parameters  Output parameters  Links ]
Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Sat May 14 18:57:46 2022