CERN Program Library Long Writeup W5013 - CERNLIB ...

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Geant 3.16 GEANT User’s Guide ZZZZ010 Origin : GEANT Submitted: 01.10.84 Revision : Revised: 08.11.93 Documentation : 1 Introduction List of COMMON Blocks Here, the main features of the common blocks used in GEANT are summarised, with special mention of the variables initialised in GINIT and of the possibility of overriding them through data records [BASE040] or interactive commands [XINT]. In most of the cases there is a correspondence between a given data structure and a given common block where the current contents of the banks are stored. The labelled common blocks are accessible through Patchy/CMZ sequences identified by the name of the COMMON. They are defined in the Patch GCDES. Note: Unless otherwise specified, the long range variables are initialised in GINIT. When non-zero, default values are quoted between brackets. If the value may be modified the keyword for the data record and for the interactive command is also given in bold characters between brackets. 1.1 Dynamic memory The GEANT data structures are stored in the common /GCBANK/ accessible through the following Patchy sequence: The /GCLINK/ variables are pointers to the GEANT data structures in the /GCBANK/ common. They belong to a permanent area declared in GZINIT. +SEQ /GCBANK/ Dynamic core for the GEANT data structures C PARAMETER (KWBANK=69000,KWWORK=5200) COMMON/GCBANK/NZEBRA,GVERSN,ZVERSN,IXSTOR,IXDIV,IXCONS,FENDQ(16) + ,LMAIN,LR1,WS(KWBANK) DIMENSION IQ(2),Q(2),LQ(8000),IWS(2) EQUIVALENCE (Q(1),IQ(1),LQ(9)),(LQ(1),LMAIN),(IWS(1),WS(1)) EQUIVALENCE (JCG,JGSTAT) COMMON/GCLINK/JDIGI ,JDRAW ,JHEAD ,JHITS ,JKINE ,JMATE ,JPART + ,JROTM ,JRUNG ,JSET ,JSTAK ,JGSTAT,JTMED ,JTRACK,JVERTX + ,JVOLUM,JXYZ ,JGPAR ,JGPAR2,JSKLT 1.2 Other user accessed common blocks +SEQ /GCCUTS/ Tracking thresholds C COMMON/GCCUTS/CUTGAM,CUTELE,CUTNEU,CUTHAD,CUTMUO,BCUTE,BCUTM + ,DCUTE ,DCUTM ,PPCUTM,TOFMAX,GCUTS(5) 418 ZZZZ010 – 1
This common contains the threshold for various processes and particles. The energy values are the kinetic energy in GeV: CUTGAM CUTELE CUTNEU CUTHAD CUTMUO BCUTE BCUTM DCUTE DCUTM PPCUTM TOFMAX GCUTS threshold for gamma transport (0.001, CUTS); threshold for electron and positron transport (0.001, CUTS); threshold for neutral hadron transport (0.01, CUTS); threshold for charged hadron and ion transport (0.01, CUTS); threshold for muon transport (0.01, CUTS); threshold for photons produced by electron bremsstrahlung (CUTGAM, CUTS); threshold for photons produced by muon bremsstrahlung (CUTGAM, CUTS); threshold for electrons produced by electron δ-rays (CUTELE, CUTS); threshold for electrons produced by muon or hadron δ-rays (CUTELE, CUTS); threshold for e + e − direct pair production by muon (0.002, CUTS); threshold on time of flight counted from primary interaction time (10 10 , CUTS); free for user applications (CUTS). Note: The cuts BCUTE, BCUTM and DCUTE, DCUTM are given the respective default values CUTGAM and CUTELE. Experienced users can make use of the facility offered (command CUTS) to change BCUTE, DCUTE, BCUTM and DCUTM. +SEQ /GCDRAW/ Variables used by the drawing package C COMMON/GCDRAW/NUMNOD,MAXNOD,NUMND1,LEVVER,LEVHOR,MAXV,IPICK, + MLEVV,MLEVH,NWCUT,JNAM,JMOT,JXON,JBRO,JDUP,JSCA,JDVM,JPSM, + JNAM1,JMOT1,JXON1,JBRO1,JDUP1,JSCA1,JULEV,JVLEV, + LOOKTB(16), + GRMAT0(10),GTRAN0(3),IDRNUM,GSIN(41),GCOS(41),SINPSI,COSPSI, + GTHETA,GPHI,GPSI,GU0,GV0,GSCU,GSCV,NGVIEW, + ICUTFL,ICUT,CTHETA,CPHI,DCUT,NSURF,ISURF, + GZUA,GZVA,GZUB,GZVB,GZUC,GZVC,PLTRNX,PLTRNY, + LINATT,LINATP,ITXATT,ITHRZ,IPRJ,DPERS,ITR3D,IPKHIT,IOBJ,LINBUF, + MAXGU,MORGU,MAXGS,MORGS,MAXTU,MORTU,MAXTS,MORTS, + IGU,IGS,ITU,ITS,NKVIEW,IDVIEW, + NOPEN,IGMR,IPIONS,ITRKOP,IHIDEN, + ZZFU,ZZFV,MYISEL, + DDUMMY(15) NUMNOD number of nodes in non-optimized tree; MAXNOD max. number of nodes of non-optimized tree (MIN(NLEFT, 16,000)); NUMND1 number of nodes in optimized tree; LEVVER vertical level in the tree currently scanned by tree routines; LEVHOR horizontal node in the tree currently scanned by tree routines; MAXV max vertical levels in the tree to be scanned by tree routines; IPICK node selected by GDTREE; MLEVV number of vertical levels in the last tree scanned; ZZZZ010 – 2 419
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CERN Program Library Long Writeup W
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Chapter 1: Catalog of Geant section
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IOPA500 KINE001 KINE100 KINE199 KIN
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Geant 3.21 GEANT User’s Guide AAA
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The routines made available for GEA
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outines, then you can type the foll
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AAAA Bibliography [1] H.J. Klein an
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2 Event simulation framework The fr
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• after each tracking step along
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GUDIGI GUOUT GTRIGC UGLAST GLAST GU
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Particles JPART Materials JMATE/JTM
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3 Summary of GEANT data records 3.1
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3.4 User applications KEY N I VAR S
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Geant 3.16 GEANT User’s Guide BAS
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SUBROUTINE UGEOM + (’TGT ’,2,
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LQ(JHEAD-1) user link IQ(JHEAD+1) I
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VALUE = GARNDM (DUMMY) DUMMY (REAL)
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Geant 3.16 GEANT User’s Guide CON
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1 Energy binning IDECAD Bin number
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Particle No. Mass(GeV) Charge Life
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¯Ω + ¯Ξ 0 π + 23.60 ¯ΛK + 67
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Geant 3.16 GEANT User’s Guide DRA
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The main drawing routines are: GDRA
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Another feature which is available
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z y x C CHARACTER*4 CHNAMS(5) INTEG
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CALL GDRAWC(’OPAL’,2,0.,10.,10.
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CALL GSATT(’HB’,’FILL’,3) C
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CALL GDRAW(’CAVE’,40.,40.,0.,10
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Figure 16: Example of use of GDSPEC
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CALL GDOPEN(3) CALL GDRAWC(’ALEF
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6 NKVIEW IVIEW JDRAW NKVIEW JV = IB
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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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• if the CHONLY flag is set to MA
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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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CAVE PAR1 specifications 20/10/94 y
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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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The second problem has been solved
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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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Word # PHFN bank (data area, contin
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2 Method If the energy of the radia
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The Auger or Coster-Kronig transiti
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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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The variable DCUTE in common /GCCUT
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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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Counts 900 800 Landau 700 40 600 20
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Fast simulation for n 3 ≥ 16 If t
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ξ/E Max (hereafter κ) relative im
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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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∆σ σ = { 12 − 15% for T ≤ 1
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T(MeV) C Pb ∆El 0 ∆E l ∆σ l
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1. sample x from 1 1 ln 1 x c x set
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E bind , eV 10 5 10 20 30 40 50 60
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eV). At present the values recommen
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calculated dE dx − dE measured dx
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Figure 43: Stopping powers in Carbo
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esults can be seen in table 2 and 3
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VALUE = GBRSGM (Z,T,BCUT) Z T BCUT
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The functions F i (Z,X,Y) (i = σ,
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where, (a − 1) 1 f(ν) = ( ) 1 ν
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where: Γ = kα 2π [ ɛ = W E 1 1
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NLM DENS CORR IPART (INTEGER) numbe
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Hydrogen (bound) Sodium Copper Hydr
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[25] M. Gavrila. Relativistic l-she
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[78] R.W.Williams. Fundamental Form
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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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e drawn. NAMNUM contain the arrays
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following levels (red arrows) and o
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Page 451 and 452: C ESHELL - Shells potentials in eV
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Page 455 and 456: GFKINE KINE001, KINE100, KINE199 GF
Page 457 and 458: GPSTAT GEOM700 GPTMED CONS001, CONS
Page 459 and 460: ZZZZ Bibliography [1] T.Sjöstrand
Page 461 and 462: CDRSGA, 297 CGMULO, 221 CHANGEWK, 3
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Page 465 and 466: GPART, 13, 46, 61, 293 GPCXYZ, 40,
Page 467: PATCHY, 278 PCUTS, 399 PDIGI, 389 P
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