CERN Program Library Long Writeup W5013 - CERNLIB ...

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GTHADR/ GTNEUT ❄ GUPHAD Interface routines ❄ FLDIST First time only n, E kin < 20 MeV ❄ FLINIT ❄ FLUKA initialisation routines Distance to the interaction (FLUKA) ❄ ❄ SIGEL NIZLNW Elastic Inelastic processes processes ❄ GPGHEI Figure 45: <strong>Program</strong> flow for calculation of the distance to the next interaction point GTHADR/ GTNEUT ❄ GUHADR ❄ FLUFIN n, E kin < 20 MeV FLUKA interaction routines ❄ ❄ EVENTV NUCREL Inelastic Elastic interactions interactions ❄ GHEISH Figure 46: <strong>Program</strong> flow for generating secondary particles PHYS520 – 2 324
Geant 3.16 GEANT User’s Guide PHYS530 Origin : T.Gabriel, C.Zeitnitz, K.Lassila-Perini Submitted: 17.12.93 Revision : Revised: 17.12.93 Documentation : K.Lassila-Perini 1 Subroutines The GEANT/MICAP interface CALL GMORIN GMORIN initialises the MICAP variables and reads the cross-section file for the materials that have been defined. It is called from GFMDIS when a neutron with kinetic energy below 20 MeV enters there first time. CALL GFMDIS GFMDIS computes the distance to the next interaction points. It calls the FLUKA routines to compute the cross-sections for all particles except neutrons with kinetic energy below 20 MeV for which MICAP function SIGMOR is called. GFMDIS is called from the user routine GUPHAD where the hadronic package can be chosen. The only difference between GFLDIS (see [PHYS520]) and GFMDIS is that for the former, GHEISHA hadronic package is called for the neutrons below 20 MeV, and for the latter, the low-energy neutrons are handled by MICAP. CALL GFMFIN GFMFIN calls the FLUKA routines to generate the hadronic interaction. For the neutrons with kinetic energy below 20 MeV GMICAP is called. The only difference between GFLFIN (see [PHYS520]) and GFMFIN is that for the former, GHEISHA hadronic package is called for the neutrons below 20 MeV, and for the latter, the low-energy neutrons are handled by MICAP. GFMFIN is called from the user routine GUHADR. CALL GMICAP GMICAP calls the MICAP routines to handle the low-energy interaction of neutrons. It writes the eventual secondaries to the GEANT stack. GMICAP is called from GFMFIN. 2 Method MICAP (A Monte Carlo Ionization Chamber Analysis Package) [103], [104] is a Monte Carlo system to analyze ionisation chamber responses. As a standalone program it contains the code for formatting the cross-section files, neutron and photon transport, the geometry definitions and the code for the chamber response. In GEANT, only the sampling of the neutron interactions from the already prepared cross-section file is included. The interface between GEANT and MICAP has been extracted from GCALOR package [105] by C.Zeitnitz and T. Gabriel. When using GEANT-MICAP interface the low-energy neutrons are handled in MICAP routines. Other hadrons and high-energy neutrons are passed to FLUKA interaction routines. For low-energy neutrons, the total crosssection is given by MICAP and if the neutron interaction is chosen by GEANT tracking routine, GMICAP reads the cross-section for neutron interactions processes, samples and generates the interaction and the returns the secondary particles (nucleons, heavy fragments, or photons) to GEANT. Information on the recoil nucleus (atomic number AMED, charge ZMED and kinetic energy ERMED) can be found in MCRECO common block. The program flow is shown in figures 48 and 47. MICAP uses pointwise cross-section data (as a difference to so called group cross-sections where the data are averaged over certain energy intervals). This method has the advantage that the resonances are not smoothed by averaging the data. The neutron cross-section are available for the following isotopes: 325 PHYS530 – 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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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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Dynamic ordering The list of neighb
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Where • @302 is the block number
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ITRA NUMBV HITS NHITS (INTEGER) is
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HITS Bibliography 175 HITS510 - 3
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0 if only IER] structures read in o
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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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2 Method If the energy of the radia
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• Case dielectric → metal. The
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5 Processes involving Čerenkov pho
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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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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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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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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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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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This common contains the threshold
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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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CFIELD constant for field step eval
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NEXT 1 particle has reached the bou
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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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