CERN Program Library Long Writeup W5013 - CERNLIB ...

11 GEANT/SCAN
To define parameters for the SCAN geometry. If the routine GUSTEP and GUKINE are properly instrumented
(see examples in GEANX), when the TRI command is entered NTETA Geantinos will be tracked
through the real detector starting at the vertex position defined by the command vertex. A simplified version
of the geometry is automatically generated in (ETA,PHI) or (THETA,PHI) following the option given
in the command TETA. The data structure LSCAN generated may be saved on an RZ file for subsequent
processing. This data structure may be used for fast parametrization techniques.
11.1 PHI nphi [ phimin phimax ]
NPHI I “Number of PHI divisions” D=90
PHIMIN R “Minimum PHI in degrees” D=0. R=0.:360.
PHIMAX R “Maximum PHI in degrees” D=360. R=0.:360.
To specify number of divisions along PHI. If no parameter is given, the current values of the parameters are
displayed.
11.2 TETA nteta [ tetmin tetmax divtyp ]
NTETA I “Number of TETA divisions” D=90
TETMIN R “Minimum value of TETA”
TETMAX R “Maximum value of TETA”
DIVTYP I “Type of TETA division” R=1:3
To specify number of divisions along TETA. If DIVTYP=1 divisions in pseudo-rapidity ETA. If DIVTYP=2
divisions in degrees following the THETA angle. If DIVTYP=3 divisions in cos(TETA). If no parameter is
given, the current values of the parameters are displayed.
11.3 SLIST list
LIST C “List of master volumes”
Only boundary crossings of volumes given in LIST will be seen in the SCAN geometry. If no parameters
are given, the current SCAN volumes will be listed. If a full stop (.) is given, the list of scan volumes will
be erased.
11.4 VERTEX vx vy vz
VX R “Scan X-origin” D=0.
VY R “Scan Y-origin” D=0.
VZ R “Scan Z-origin” D=0.
All Geantinos tracked will start from position VX,VY,VZ.
11.5 SFACTORS factx0 factl factr
FACTX0 R “Scale factor for SX0” D=100.
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