CERN Program Library Long Writeup W5013 - CERNLIB ...

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GSTINI Initialisation of the energy loss tables for the thin layers, see [PHYS334]. GFCNRM Calculation of mean ionisation potentials and normalisation factors for oscillator functions. GSREE0 Calculation of the real part of the refractive index. GSDNDX Calculation of number of collisions for a given value of β. GMULOF Calculation of the STMIN tables, see [PHYS325]. GMOLIO Calculation of the constants of Molière scattering to estimate the step limitation due to multiple scattering simulation, see [PHYS325]. End of loop on tracking media Notes: 1. The µ-nucleus interactions are treated either as a continuous energy loss by the muon (IMUNU= 0) or as a discrete process (IMUNU≥1), in an exclusive way i.e.: • If IMUNU= 0, the dE/dx due to the interactions is added to that coming from direct (e + /e − ) pair production in the routine GPRELA. • If IMUNU≥ 1, the total cross section is computed in GMUNUI. 2. The total cross sections for hadronic interactions cannot be tabulated at initialisation time, as they are dependent on the nature of the incident particle. They are computed at tracking time by the function FLDIST in case of FLUKA [PHYS520], GHESIG in case of GHEISHA [PHYS510] or FMDIST in case of MICAP [PHYS530]. PHYS100 – 4 210
Geant 3.16 GEANT User’s Guide PHYS210 Origin : L. Urbán Submitted: 10.11.84 Revision : Revised: 16.12.93 Documentation : 1 Subroutines Total cross-section for e+e- pair production by photons CALL GPRSGA GPRSGA calculates the total cross-section for the pair production of photons and the direct pair production of muons in all materials. It tabulates the mean free path, λ =1/Σ (in cm), as a function of the medium and the energy. For the pair production by photons, it calls the function GPRSGG. The energy bins are the one of the array ELOW in common /CGMULO/ initialised in the routine GPHYSI. The following pointers are used: JMA = LQ(JMATE-I) JPAIR = LQ(JMA-10) pointer to the I th material pointer to pair production cross-sections GPRSGA is called at initialisation time by GPHYSI. VALUE = GPRSGG (Z,E) GPRSGG calculates the total cross-section for the pair production of a photon with energy E in material with atomic number Z. It is called by GPRSGA. 2 Method We have parameterised the total cross-section of e + e − -pair production by photon as: σ(Z, E γ )=Z(Z +1)(F 1 (X)+F 2 (X)Z + F 3 (X)/Z) (barn/atom) (1) where X = ln(E γ /m), m = electron mass, E γ = photon energy and F i (X) = 5∑ c n X n n=0 The parameters c n were taken from a least-square fit to the data [9] and can be found in the DATA statement in the function GPRSGG(Z,E) which computes the formula (1) (in barn/atom). This parameterisation gives a good description of the data in the range: 1 ≤ Z ≤ 100 1.5 MeV ≤ E γ ≤ 100 GeV } ∆ σ σ ≤ 5% with a mean value of ≈ 2.2% (2) This mean free path is tabulated at initialisation as a function of the medium and of the energy by the routine GPRSGA. 211 PHYS210 – 1
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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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Geant 3.16 GEANT User’s Guide HIT
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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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Geant 3.16 GEANT User’s Guide PHY
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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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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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YES NO 6.7 SCONS name numed inrdw o
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7 GEANT/CONTROL Control commands. 7
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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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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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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 COMMON/GCVOL2/NLEVE2,NAMES2(15),N
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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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