+-------------+ +----------##
| Geant 3.15 | GEANT User's Guide | CONS210 ##
+-------------+ +----------##
Author(s) : R.Brun Submitted: 11.02.86
Origin : R.Brun,F.Bruyant Revised: 13.05.92
+----------------------------------------------------+
|CALL GSTPAR (ITMED,CHPAR,PARVAL) |
+----------------------------------------------------+
The data structure JTMED contains the standard tracking parameters (CUTS and flags to control the physics processes) which are used by default for all tracking media. It is possible to redefine individually with GSTPAR any of these parameters for a given tracking medium.
For example to change CUTGAM to 0.0001 : CALL GSTPAR(ITMED,'CUTGAM',0.0001)
+-------------------------------------------------------------
| | | |
+---Default-parameters----+-Parameter-name--+-Default-value--+
| | | |
| Q(JTMN +1) = CUTGAM | CUTGAM | 0.001Gev |
| Q(JTMN +2) = CUTELE | CUTELE | 0.001Gev |
| Q(JTMN +3) = CUTNEU | CUTNEU | 0.01Gev |
| Q(JTMN +4) = CUTHAD | CUTHAD | 0.01Gev |
| | | |
| Q(JTMN +5) = CUTMUO | CUTMUO | 0.01Gev |
| Q(JTMN +6) = BCUTE | BCUTE | CUTGAM |
| Q(JTMN +7) = BCUTM | BCUTM | CUTGAM |
| Q(JTMN +8) = DCUTE | DCUTE | 10.Tev |
| Q(JTMN +9) = DCUTM | DCUTM | 10.Tev |
| Q(JTMN+10) = PPCUTM | PPCUTM | 0.01Gev |
| | | |
| Q(JTMN+11) = IPAIR | PAIR | 1 |
| Q(JTMN+12) = ICOMP | COMP | 1 |
| Q(JTMN+13) = IPHOT | PHOT | 1 |
| Q(JTMN+14) = IPFIS | PFIS | 0 |
| Q(JTMN+15) = IDRAY | DRAY | 2 |
| Q(JTMN+16) = IANNI | ANNI | 1 |
| | | |
| Q(JTMN+17) = IBREM | BREM | 1 |
| Q(JTMN+18) = IHADR | HADR | 1 |
| Q(JTMN+19) = IMUNU | MUNU | 0 |
| Q(JTMN+20) = IDCAY | DCAY | 1 |
| Q(JTMN+21) = ILOSS | LOSS | 2 |
| Q(JTMN+22) = IMULS | MULS | 1 |
| | | |
| Q(JTMN+26) = GHEISHA | GHCOR1 | see [PHYS700] |
| Q(JTMN+27) = MODEL | BIRK1 | see [PHYS???] |
| Q(JTMN+28) = RKB | BIRK2 | see [PHYS???] |
+-Q(JTMN+29)--=--C--------+-BIRK3-----------+-see-[PHYS???]--+
|
|
For comments on default values for IDRAY and ILOSS see [BASE 040].
The default tracking medium parameters are stored in the bank whose pointer is stored in the JTMED variable. In this case in the above table JTMN= JTMED. In the case one or more of the above parameters has been modified for a specific tracking medium, the whole parameter set is stored in the next bank of the given trackin medium. In this case JTMN= LQ(JTM) in the above table, where JTM is the pointer to the bank of the tracking medium, i.e. JTM= LQ(JTMED-ITMED).
Note
At tracking time the parameters above are copied from JTMN into the COMMON blocks /GCCUTS/ and /GCPHYS/