/gras/geom_biasing/

geometrical biasing detector control.

Sub-directories :

Commands :

geom_biasing [biasingFlag]

switching geometrical importance biasing off or on (1 or 0)
Default = false

Available Geant4 state(s) : PreInit Idle

Parameters

biasingFlag

type b

geometry [biasinggeom]

Choose importance sampling geometry: cylindrical, spherical or planar

Available Geant4 state(s) : PreInit Idle

Parameters

biasinggeom

type s

granularity [geomgranularity]

Choose granularity of importance biasing: normal or fine

Available Geant4 state(s) : PreInit Idle

Parameters

geomgranularity

type s

number_layers [numberlayers]

Number of biasing layers, default = 10

Available Geant4 state(s) : PreInit Idle

Parameters

numberlayers

type i

particle [biasparticle]

Choose particle for biasing: e+, e-, gamma, neutron, proton

Available Geant4 state(s) : PreInit Idle

Parameters

biasparticle

type s

spacing [biasingspacing]

Choose importance sampling spacing: auto or custom

Available Geant4 state(s) : PreInit Idle

Parameters

biasingspacing

type s

length [biasinglength] [Unit]

Length of biasing geometry from start
For spherical case this is thickness of bias geometry

Available Geant4 state(s) : PreInit Idle

Parameters

biasinglength	type d
Unit	type s	Omittable : default value = cm	Parameter candidates : pc km m cm mm um nm Ang fm parsec kilometer meter centimeter millimeter micrometer nanometer angstrom fermi

width [biasingwidth] [Unit]

Outer Radius of biasing geometry (cylindrical and spherical), side (planar)

Available Geant4 state(s) : PreInit Idle

Parameters

biasingwidth	type d
Unit	type s	Omittable : default value = cm	Parameter candidates : pc km m cm mm um nm Ang fm parsec kilometer meter centimeter millimeter micrometer nanometer angstrom fermi

add_interface [biasingspacingvalue] [Unit]

Add an importance sampling interface at a given point - linear distance from start of biasing

Available Geant4 state(s) : PreInit Idle

Parameters

biasingspacingvalue	type d
Unit	type s	Omittable : default value = cm	Parameter candidates : pc km m cm mm um nm Ang fm parsec kilometer meter centimeter millimeter micrometer nanometer angstrom fermi

weight [biasingweight]

Choose weight option: auto (~2), global (set value), custom (individual values)

Available Geant4 state(s) : PreInit Idle

Parameters

biasingweight

type s

start [X] [Y] [Z] [Unit]

Set start of the biasing geometry

Available Geant4 state(s) : PreInit Idle

Parameters

X	type d	Omittable : current value is used as the default value.
Y	type d	Omittable : current value is used as the default value.
Z	type d	Omittable : current value is used as the default value.
Unit	type s	Omittable : default value = cm	Parameter candidates : pc km m cm mm um nm Ang fm parsec kilometer meter centimeter millimeter micrometer nanometer angstrom fermi

direction [dx] [dy] [dz]

Choose direction for biasing (minus is in rather than out)

Available Geant4 state(s) : PreInit Idle

Parameters

dx	type d	Omittable : default value =
dy	type d	Omittable : default value =
dz	type d	Omittable : default value =

update

Update geometry.
This command MUST be applied before "beamOn"
if you changed geometrical value(s)

Available Geant4 state(s) : PreInit Idle