CERN Program Library Long Writeup W5013 - CERNLIB ...

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SAFETY SLENG STEP SNEXT SFIELD TOFG GEKRAT UPWGHT IGNEXT underestimated distance to closest medium boundary; current track length; size of current tracking step; distance to current medium boundary along the direction of the particle; obsolete; current time of flight in seconds; interpolation coefficient in the energy table ELOW; user word for current particle; indicates whether the particles is reaching a medium boundary in the current step: 0 SNEXT has not been computed in current step; 1 SNEXT has been computed in current step: particle is reaching a boundary; INWVOL 0 track is inside a volume; 1 track has entered a new volume or it is a new track; 2 track is exiting current volume; 3 track is exiting the setup; ISTOP 0 particle will continue to be tracked; 1 particle has disappeared (decay, inelastic interaction ...); 2 particle has fallen below the cutoff energy or has interacted but no secondaries have been generated; IGAUTO 0 tracking parameters are given by the user; 1 tracking parameters are calculated by GEANT; IEKBIN current kinetic energy bin in table ELOW; ILOSL local energy loss flag (see /GCPHYS/); IMULL local multiple scattering flag (see /GCPHYS/); INGOTO NLDOWN NLEVIN NLVSAV ISTORY POLAR NAMEC1 daughter number, in the current mother, which the particle will enter if continuing along a straight line for SNEXT centimeters; lowest level reached down the tree (parallel tracking only); number of levels currently filled and valid in /GCVOLU/; current level (parallel tracking only); User flag for current track history (reset to 0 in GLTRAC); polarisation vector for current Čerenkov photon; additional list of mechanism names for current step (ASCII codes stored in an integer, 4 characthers per word); List of mechanisms active in the current step. CHARACTER*4 MEC(MAXMEC),MEC1(MAXME1),DFLT(2) PARAMETER (LEFTM1=MAXME1-9) DATA MEC/’NEXT’,’MULS’,’LOSS’,’FIEL’,’DCAY’,’PAIR’,’COMP’,’PHOT’ + ,’BREM’,’DRAY’,’ANNI’,’HADR’,’ECOH’,’EVAP’,’FISS’,’ABSO’ + ,’ANNH’,’CAPT’,’EINC’,’INHE’,’MUNU’,’TOFM’,’PFIS’,’SCUT’ + ,’RAYL’,’PARA’,’PRED’,’LOOP’,’NULL’,’STOP’/ DATA MEC1/’LABS’,’LREF’,’SMAX’,’SCOR’,’CKOV’,’REFL’,’REFR’, + ’SYNC’,’STRA’,LEFTM1*’ ’/ 442 ZZZZ010 – 25
NEXT 1 particle has reached the boundary of current volume; MULS 2 multiple scattering; LOSS 3 continuous energy loss; FIEL 4 bending in magnetic field; DCAY 5 particle decay; PAIR 6 photon pair-production or muon direct pair production; COMP 7 Compton scattering; PHOT 8 photoelectric effect; BREM 9 bremsstrahlung; DRAY 10 δ-ray production; ANNI 11 positron annihilation; HADR 12 hadronic interaction; ECOH 13 hadronic elastic coherent scattering; EVAP 14 nuclear evaporation; FISS 15 nuclear fission; ABSO 16 nuclear absorption; ANNH 17 anti-proton annihilation; CAPT 18 neutron capture; EINC 19 hadronic elastic incoherent scattering; INHE 20 hadronic inelastic scattering; MUNU 21 muon-nuclear interaction; TOFM 22 exceeded time of flight cut; PFIS 23 nuclear photo-fission; SCUT 24 the particle due to bending in magnetic field was unexpectedly crossing volume boundaries and the step has been halved to avoid this; RAYL 25 Rayleigh effect; PARA 26 parametrisation activated; PRED 27 error matrix computed (GEANE tracking); LOOP 28 not used; NULL 29 no mechanism is active, usually at the entrance of a new volume; STOP 30 particle has fallen below energy threshold and tracking stops; LABS 101 Čerenkov photon absorption; LREF 102 Čerenkov photon reflection/refraction; SMAX 103 step limited by STEMAX; SCOR 104 correction against loss of precision in boundary crossing; CKOV 105 Čerenkov photon generation; REFL 106 Čerenkov photon reflection; REFR 107 Čerenkov photon refraction; SYNC 108 synchrotron radiation generation; STRA 109 PAI or ASHO model used for energy loss fluctuations. ZZZZ010 – 26 443
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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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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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Page 465 and 466: GPART, 13, 46, 61, 293 GPCXYZ, 40,
Page 467: PATCHY, 278 PCUTS, 399 PDIGI, 389 P
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