CERN Program Library Long Writeup W5013 - CERNLIB ...

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FUNCTION NEXTMA() +SEQ, GCBANK IF(JMATE.LE.0) THEN NEXTMA = 1 ELSE DO 10 IMAT = 1, IQ(JMATE-2) IF(LQ(JMATE-IMAT).EQ.0) GOTO 20 10 CONTINUE 20 NEXTMA = IMAT ENDIF END 2 Materials The material constants are stored in the data structure JMATE via the routine GSMATE and can be retrieved via the routine GFMATE and printed via the routine GPMATE. The routine GMATE calls repeatedly the routine GSMATE to define a standard set of materials, but its use is not mandatory. Mixtures of basic materials, compounds or molecules with atoms from different basic materials, may also be defined and their characteristics are stored in the structure JMATE, through calls to the routine GSMIXT. Mixtures of compounds are allowed. Quantities such as energy loss and cross-section tables (see [PHYS]), computed during the initialisation of the program are stored in the structure JMATE. These can be accessed through the routine GFTMAT and plotted or printed through the routines GPLMAT and GPRMAT respectively. 3 Tracking media The tracking medium parameters are stored in the data structure JTMED by the routine GSTMED. Details about these parameters are given in [TRAK]. They can be accessed with the routine GFTMED and printed with the routine GPTMED. The correctness of the transport process and thus the reliability of the results obtained with GEANT depend critically on the values of the tracking medium parameters. To help the user, most of the parameters are recalculated by default by GEANT irrespective of the value assigned by the user. Advanced users can control the value of the parameters thus bypassing the automatic computation. See the description of the routine GSTMED for more information. The tracking thresholds, and other parameters and flags that control the physics processes, defined in GINIT and possibly modified through the relevant data records, are also stored in the structure JTMED. These parameters can be redefined for each tracking medium via the routine GSTPAR. 4 Particles The parameters of the particles transported by GEANT are stored in the data structure JPART via the routine GSPART. The decay properties of particles are defined via the routine GSDK. The particle constants can be accessed with the routine GFPART and printed with the routine GPPART. The routine GPART defines the standard table of particles, branching ratios and decay modes. This routine needs to be called for the GEANT system to work properly. GPART calls the routine GSPART for the particle properties and GSDK for the decays for each particle in the standard GEANT table. The user may call GSPART and GSDK to extend or modify the table defined by GPART. CONS001 – 2 46
Geant 3.16 GEANT User’s Guide CONS100 Origin : R.Brun, G.N.Patrick Submitted: 06.06.83 Revision : Revised: 01.11.93 Documentation : Material definition CALL GMATE Stores the following standard material constants in the data structure [7] JMATE. Material No. A Z Density Radiat L Hydrogen 1 1.010 1.000 0.071 865.000 Deuterium 2 2.010 1.000 0.162 757.000 Helium 3 4.000 2.000 0.125 755.000 Lithium 4 6.940 3.000 0.534 155.000 Beryllium 5 9.010 4.000 1.848 35.300 Carbon 6 12.010 6.000 2.265 18.8 Nitrogen 7 14.010 7.000 0.808 44.500 Neon 8 20.180 10.000 1.207 24.000 Aluminium 9 26.980 13.000 2.700 8.900 Iron 10 55.850 26.000 7.870 1.760 Copper 11 63.540 29.000 8.960 1.430 Tungsten 12 183.850 74.000 19.300 0.350 Lead 13 207.190 82.000 11.350 0.560 Uranium 14 238.030 92.000 18.950 0.320 Air 15 14.610 7.300 1.205 × 10 −3 30423 Vacuum 16 10 −16 10 −16 10 −16 10 16 Note: this table provides some material definition with standard properties. Advanced user will want to define their own table of materials, which can be done with the routine GSMATE, described below. CALL GSMATE (IMATE,CHNAMA,A,Z,DENS,RADL,ABSL,UBUF,NWBUF) Stores the constants for the material IMATE in the data structure JMATE. IMATE (INTEGER) material number; CHNAMA (CHARACTER*20) material name; A (REAL) atomic weight; Z (REAL) atomic number; DENS (REAL) density in g cm −3 ; RADL (REAL) radiation length in cm; ABSL (REAL) absorption length in cm. This parameter is ignored by GEANT, but it has been kept in the calling sequence for backward compatibility; UBUF (REAL) array of NWBUF additional user parameters; NWBUF (INTEGER) number of user words in UBUF. 47 CONS100 – 1
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Page 7 and 8: Geant 3.21 GEANT User’s Guide AAA
Page 9 and 10: The routines made available for GEA
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Page 15 and 16: 2 Event simulation framework The fr
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Page 23 and 24: 3 Summary of GEANT data records 3.1
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SHAD EDGE when HIDE is ON, selects
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x1xxxx 1xxxxx add the text EVENT NR
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DRAW Bibliography [1] R.Bock et al.
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2 Volumes with contents A volume ca
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The user can position a volume thro
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0 1 2 1 0 1 0 1 2 3 4 5 6 7 Figure
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2 Divisions along arbitrary axis As
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9.BL2 half-length along x of the si
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1.DZ half-length along the z axis;
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ECAL BOX specifications 18/11/93 EC
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ECAL SPHE specifications 18/11/93 E
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Geant 3.16 GEANT User’s Guide GEO
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y y x x y y y y z z x x z z y y x x
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Dynamic ordering The list of neighb
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are represented by their values. A
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Where • @302 is the block number
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GEOM Bibliography [1] French Standa
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Geant 3.16 GEANT User’s Guide HIT
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ITRA NUMBV HITS NHITS (INTEGER) is
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HITS Bibliography 175 HITS510 - 3
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Geant 3.16 GEANT User’s Guide IOP
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0 if only IER] structures read in o
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Geant 3.16 GEANT User’s Guide IOP
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IOPA Bibliography [1] J.Zoll. ZEBRA
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Geant 3.16 GEANT User’s Guide KIN
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NTRACK ITRA JKINE NTRACK JK 1 2 3 4
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Geant 3.16 GEANT User’s Guide PHY
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Below are listed the data record ke
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Computation of total crosssection o
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7. Update the number of interaction
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1= generation of secondaries enable
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DEEMAX The formula used by GEANT is
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GPHYSI Initialisation of physics pr
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• the mean number of tries is not
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as function of the variable u = Eθ
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GEANT 3.16 GEANT User’s Guide PHY
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where N Z(Z i ) A(A i ) ρ σ Avoga
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2 Method If the energy of the radia
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where: n number of energy bins q i
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• Case dielectric → metal. The
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| ⃗ k| = | ⃗ k ′′ | = k =
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Case dielectric → metal In this c
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5 Processes involving Čerenkov pho
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Much of the difficulty in approxima
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CALL GMOLIE (OMEGA,BETA2,DIN*) OMEG
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where λ 0 = ¯h/p Compton waveleng
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2.3 Sampling of the distribution fu
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X 0 is the radiation length. From (
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where we have set Θ=θ/χ α . To
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2.2 Total cross-sections The integr
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For the other charged particles the
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POTI POTIL (REAL) average ionisatio
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where φ(λ) = 1 ∫ c+i∞ exp (u
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Fast simulation for n 3 ≥ 16 If t
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ln(∫ σ γ dE/norm.factor) -4 -6
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VALUE = GBFSIG (T,C) GBFSIG calcula
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calculated dE dx − dE measured dx
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Figure 43: Stopping powers in Carbo
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VALUE = GBRSGM (Z,T,BCUT) Z T BCUT
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where, (a − 1) 1 f(ν) = ( ) 1 ν
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[CONS]). Usually, this is done toge
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Geant 3.16 GEANT User’s Guide TRA
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VECT,SNEXT,SAFETY Compute distance
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VECT,SNEXT,SAFETY Compute distance
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VECT,SNEXT,SAFETY Compute SFIELD,SM
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SUBROUTINE GUSTEP +SEQ,GCKING,GCVOL
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CALL GRKUTA (CHARGE,STEP,VECT,VOUT*
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Geant 3.16 GEANT User’s Guide XIN
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Clicking then on the right button o
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YMED R “ Center Y coordinate ”
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HIDE is ON, the detector can be exp
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following levels (red arrows) and o
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Draw a polyline of ’npoint’ poi
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a dynamical 3-D analysis of the sim
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1. position the cursor at (uz0,vz0)
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CHUSET C “User set identifier”
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Set current attribute. 4.8 SSETVA [
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CALL GDCOL(-abs(icol)) 4.12 LWID lw
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5 GEANT/GEOMETRY Geometry commands.
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Print matrixes’ specifications. 5
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YES NO 6.7 SCONS name numed inrdw o
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8.5 CDIR [ chpath chopt ] CHPATH C
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9 GEANT/FZ ZEBRA/FZ commands 9.1 FZ
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Check the structure of one or more
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FACTL R “Scale factor for SL” D
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12 GEANT/PHYSICS Commands to set ph
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Possible IDRAY values are: 0 1 2 To
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12.14 PAIR [ ipair ] IPAIR C “Fla
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PPCUTM R “Cut for e+e- pairs by m
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LGET_15 C “user word” LGET_16 C
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LSTAT_7 C “user word” LSTAT_8 C
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XINT Bibliography [1] R.Brun and P.
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This common contains the threshold
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ITR3D track being scanned (used tog
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NCLAS1 NCLAS2 NCLAS3 IHOLE CGXMIN C
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* PARAMETER (MAXJMP=30) COMMON/GCJU
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GYMAX GZMIN GZMAX GXXXX GYYYY GZZZZ
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RADDEG radiants to degrees conversi
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PCUTNE parameterisation threshold f
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SMULS SOMULS STMULS DPHYS3 ILABS SL
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S2 S3 SS1 SS2 SS3 LEP IPORLI ISUBLI
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NEXT 1 particle has reached the bou
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C ESHELL - Shells potentials in eV
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Geant 3.11 GEANT User’s Guide ZZZ
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GFKINE KINE001, KINE100, KINE199 GF
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GPSTAT GEOM700 GPTMED CONS001, CONS
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