CERN Program Library Long Writeup W5013 - CERNLIB ...

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In the CERN Program Library maintenance scheme, three versions of any product are present at the same time on the central systems, in the OLD, PRO and NEW areas with those same names. This scheme does not apply to GEANT because every new release usually contains modifications in the physics which can produce, we hope, better but often different results with respect to the previous version. It is therefore appropriate to offer to the users an extra level of protection against running inadvertedly the wrong version by appending the version number to all the files of GEANT. In this way the users will have to change their procedure to change the version of GEANT. On the other hand, the new user should not bother about version numbers and correction files, and so an alias is installed on all systems without any version number, always pointing to the latest released version. As said before, users’ feed-back is of paramount importance in detecting problems or areas for improvement in the system, so the new version is made available in the NEW area well before the official release. If, on the one hand, those who use this version do so at their own risk, on the other hand users are encouraged to perform as much testing as possible, in order to detect the maximum number of problems before the final release. Modifications in the pre-release version are made directly in the source code. When problems are discovered, which may seriously affect the validity of the results of the simulation, they are corrected and the library recompiled in the /new area. To minimise network transfer for remote users and in the interest of the stability of the system, the source code of the released version in PRO is not touched, but rather the correction is applied via a so-called correction cradle which is a file containing the differences between the original and the corrected version in a format required by PATCHY/CMZ. Both these programs can read the original source and the correction cradle and produce the corrected source. The corrected car/cmz source and the corrected binary library are made then available in /pro at the following CERNLIB release (when /new becomes /pro). The cmz source files contain the full history of the corrections applied with proper versioning, so that every intermediate version can be rebuild. Users at CERN should not need to use the correction cradle other than for documentation purposes. Remote users may want to obtain the cradle and apply the corrections. At every CERNLIB release the correction cradle is obviously reset to be empty, as all the corrections have been applied in the code directly. The correction cradle for the OLD version is available but has to be considered frozen. No correction is ever applied to an old version. New versions of GEANT are moved into the PRO area synchronously with releases of the CERN Program Library. If no new version of GEANT is available at the time of the release of the Program Library, the GEANT files do not change their location and the production version remains the same. 4 Availability of the documentation This document has been produced using L A TEX 2 with the cernman and cerngeant style options, developed at CERN. A printable version of each of the sections described in this manual can be obtained as a compressed PostScript file from CERN by anonymous ftp. You can look in the directory described in the procedure below for more details. For instance, if you want to transfer the description of the physics 2 Leslie Lamport, L A TEX – A Document Preparation System. Addison–Wesley, 1985 AAAA001 – 4 8
outines, then you can type the following (commands that you have to type are underlined): 3 ftp asis01.cern.ch Trying 128.141.201.136... Connected to asis01.cern.ch. 220 asis01 FTP server (SunOS 4.1) ready. Name (asis01:username): anonymous Password: your_mailaddress ftp> binary ftp> cd cernlib/doc/ps.dir/geant ftp> get phys.ps.Z ftp> quit 3 You can of course issue multiple get commands in one run. 9 AAAA001 – 5
Page 1 and 2: CERN Program Library Long Writeup W
Page 3 and 4: Chapter 1: Catalog of Geant section
Page 5 and 6: IOPA500 KINE001 KINE100 KINE199 KIN
Page 7 and 8: Geant 3.21 GEANT User’s Guide AAA
Page 9: The routines made available for GEA
Page 13 and 14: AAAA Bibliography [1] H.J. Klein an
Page 15 and 16: 2 Event simulation framework The fr
Page 17 and 18: • after each tracking step along
Page 19 and 20: GUDIGI GUOUT GTRIGC UGLAST GLAST GU
Page 21 and 22: Particles JPART Materials JMATE/JTM
Page 23 and 24: 3 Summary of GEANT data records 3.1
Page 25 and 26: 3.4 User applications KEY N I VAR S
Page 27 and 28: Geant 3.16 GEANT User’s Guide BAS
Page 31 and 32: SUBROUTINE UGEOM + (’TGT ’,2,
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Page 45 and 46: VALUE = GARNDM (DUMMY) DUMMY (REAL)
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Geant 3.16 GEANT User’s Guide CON
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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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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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6 GEANT/CREATE It creates volumes o
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YES NO 6.7 SCONS name numed inrdw o
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7 GEANT/CONTROL Control commands. 7
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To change lout in /GCUNIT/ Note: un
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IPART I “Particle number” NAPAR
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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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13.6 GEOM [ lgeom˙1 lgeom˙2 lgeom
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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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DENS density of current material in
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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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NTETA TETMIN TETMAX MODTET number o
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S2 S3 SS1 SS2 SS3 LEP IPORLI ISUBLI
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CFIELD constant for field step eval
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NEXT 1 particle has reached the bou
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C COMMON/GCVOL2/NLEVE2,NAMES2(15),N
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STEP PLIN PLOG BE2 PLASM TRNSMA BOS
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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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ZZZZ Bibliography [1] T.Sjöstrand
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CDRSGA, 297 CGMULO, 221 CHANGEWK, 3
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GEANT/DRAWING/KHITS, 372 GEANT/DRAW
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GPART, 13, 46, 61, 293 GPCXYZ, 40,
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PATCHY, 278 PCUTS, 399 PDIGI, 389 P
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