CERN Program Library Long Writeup W5013 - CERNLIB ...

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VALUE = GUPLSH (MEDI0, MEDI1) This function must be supplied by the user. It returns a value between 0 and 1 which decsribes the quality of the surface finish between MEDI0 and MEDI1. The value 0 means maximum roughness with effective plane of reflection distributed as cos α where α is the angle between the unit normal to the effective plane of reflection and the normal to the nominal medium boundary at X0. The value 1 means perfect smoothness. In between the surface is modelled as a bell-shaped distribution in α with limits given by: sin α = ±(1 − GUPLSH) At the interface between two media the routine is called to evaluate the surface. The default version in GEANT returns 1, i.e. a perfectly polished surface is assumed. When GUPLSH = 0 the distribution of the normal to the surface is ≈ cos θ. MEDI0 MEDI1 (INTEGER) index of the current tracking medium; (INTEGER) index of the tracking medium into which the photon is entering; CALL GGCKOV This routine handles the generation of Čerenkov photons and is called from GTHADR, GTMUON and GTELEC in radiative materials for which the optical characteristics have been defined via the routine GSCKOV. CALL GSKPHO (IPHO) IPHO (INTEGER) number of the Čerenkov photon to store on the stack to be tracked. If IPHO = 0 all the generated photons will be put on the stack to be tracked. This routines takes the Čerenkov photon IPHO generated during the current step and stores it in the stack for subsequent tracking. This routine performs for Čerenkov photons the same function that the GSKING routine performs for all the other particles. The generated photons are stored in the common /GCKIN2/ ([BASE030]). CALL GTCKOV This routine is called to track Čerenkov photons. The user routine GUSTEP is called at every step of tracking. When ISTOP = 2 the photon has been absorbed. If DESTEP ≠0then the photon has been detected. CALL GGPERP (X, U, IERR) X U IERR (REAL) array of dimension 3 containing the current position of the track in the MARS; (REAL) array of dimension 3 containing on exit the normal to the surface of the current volume at the point X; (INTEGER) error flag: if IERR ≠0GGPERP failed to find the normal to the surface of the current volume. This routine solves the general problem of calculating the unit vector normal to the surface of the current volume at the point X. The result is returned in the array U. X is assumed to be outside the current volume and near a boundary (within EPSIL). The current volume is indicated by the common /GCVOLU/. U points from inside to outside in that neighbourhood. If X is within EPSIL of more than one boundary (i.e. in a corner) an arbitrary choice is made. If X is inside the current volume or if the current volume is not handled by the routine, the routine returns with IERR=1, otherwise IERR=0. At the moment the routine only handles BOXes, TUBEs, SPHEres and CONEs. 238 PHYS260 – 7
5 Processes involving Čerenkov photons The process of generating a Čerenkov photon is called CKOV and corresponds to the process value 105 (variable LMEC in common /GCTRAK/). This process is activated only in a radiator defined via the routine GSCKOV. The process of photon absorption (name LABS, code 101) is controlled by the LABS FFREAD data record. By default the process is activated for all the materials for which optical properties have been defined. The action taken at the boundary is identified by the process name LREF, code 102. At a boundary a photon can be either reflected (name REFL, code 106) or refracted (name REFR, code 107). PHYS260 – 8 239
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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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E bind , eV 10 5 10 20 30 40 50 60
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Geant 3.16 GEANT User’s Guide PHY
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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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