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[ Identification  Description  Input parameters  Output parameters  Links ] The
Neutron straight guide with gravity. Can be channeled and focusing.
Waviness may be specified, as well as side chamfers (on substrate).

Name  Unit  Description  Default 

w1  m  Width at the guide entry  
h1  m  Height at the guide entry  
w2  m  Width at the guide exit. If 0, use w1.  0 
h2  m  Height at the guide exit. If 0, use h1.  0 
l  m  length of guide  
R0  1  Lowangle reflectivity  0.995 
Qc  AA1  Critical scattering vector  0.0218 
alpha  AA  Slope of reflectivity  4.38 
m  1  mvalue of material. Zero means completely absorbing. m=0.65 glass/SiO2 Si Ni Ni58 supermirror Be Diamond m= 0.65 0.47 1 1.18 26 1.01 1.12 for glass/SiO2, m=1 for Ni, 1.2 for Ni58, m=26 for supermirror. m=0.47 for Si  1.0 
W  AA1  Width of supermirror cutoff  0.003 
nslit  1  Number of vertical channels in the guide (>= 1) (nslit1 vertical dividing walls).  1 
d  m  Thickness of subdividing walls  0.0005 
mleft  1  mvalue of material for left. vert. mirror  1 
mright  1  mvalue of material for right. vert. mirror  1 
mtop  1  mvalue of material for top. horz. mirror  1 
mbottom  1  mvalue of material for bottom. horz. mirror  1 
nhslit  1  Number of horizontal channels in the guide (>= 1). (nhslit1 horizontal dividing walls). this enables to have nslit*nhslit rectangular channels  1 
G  m/s2  Gravitation norm. 0 value disables G effects.  0 
aleft  1  alphavalue of left vert. mirror  1 
aright  1  alphavalue of right vert. mirror  1 
atop  1  alphavalue of top horz. mirror  1 
abottom  1  alphavalue of left horz. mirror  1 
wavy  deg  Global guide waviness  0 
wavy_z  deg  Partial waviness along propagation axis  0 
wavy_tb  deg  Partial waviness in transverse direction for top/bottom mirrors  0 
wavy_lr  deg  Partial waviness in transverse direction for left/right mirrors  0 
chamfers  m  Global chamfers specifications (in/out/mirror sides).  0 
chamfers_z  m  Input and output chamfers  0 
chamfers_lr  m  Chamfers on left/right mirror sides  0 
chamfers_tb  m  Chamfers on top/bottom mirror sides  0 
nelements  1  Number of sections in the guide (length l/nelements).  1 
nu  Hz  Rotation frequency (round/s) for Fermi Chopper approximation  0 
phase  deg  Phase shift for the Fermi Chopper approximation  0 
reflect  str  Reflectivity file name. Format 
"NULL" 
Name  Unit  Description  Default 

GVars    .N_reflection: (1) Array of the cumulated Number of reflections. N_reflection[0] total nb of reflections, N_reflection[1,2,3,4] l/r/t/b reflections, N_reflection[5] total nb neutrons exiting guide, N_reflection[6] total nb neutrons entering guide.  
pTable 
Guide_gravity.comp
.
[ Identification  Description  Input parameters  Output parameters  Links ]
Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Tue May 26 13:03:59 2020