CERN Program Library Long Writeup W5013 - CERNLIB ...

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• USER initialization routine, to do anything else (for example a UGINIT- like routine or a gxint315.f– like routine). The interactive version, after the initialization, gives the control to the user at the prompt GEANT > ; then it is possible to type and execute commands (corresponding to batch routines) to edit the geometry, the materials or the tracking media at run time. It is also possible to execute commands to visualize the detectors, to set the kinematics and to run events. Again interactively, one can spy the histograms, change the kinematics, and run more events (visualizing the tracks and the hits, for example). The GXINT chapter contains in the following pages a full description of the available GEANT commands. See the PAW, KUIP, DZDOC, HIGZ manuals for a description of the relative commands executable from GEANT. All the commands are also documented by an on-line help. (Try to type HELP at the first GEANT > prompt). In the interactive version, a COMIS interface is also available: COMIS is a FORTRAN interpreter which allows: • to edit at run time important routines like UGEOM, GUSTEP, GUKINE, etc. • to ‘execute’ them from the interactive session, without having to recompile and relink, by typing commands like CALL UGEOM.F. Of course the interpreter is slower than the compiled object code, then, since GEANT321, it is also possible to invoke the native compiler and to link dinamically to the executable the compiled routine (see the COMIS manual for further details). The following write ups describe individual commands which can be typed one by one at the terminal, or grouped into macros which can be edited and saved in the KUIP environment. The commands are listed in subsection 1 - 13: 2 The Motif Interface 1. General GEANT 2. Clipping commands GEANT/CVOL 3. Drawing commands GEANT/DRAWING 4. Graphics control commands GEANT/DRAWING 5. Geometry commands GEANT/GEOMETRY 6. Volume creation commands GEANT/CREATE 7. Control commands GEANT/CONTROL 8. ZEBRA/RZ commands GEANT/RZ 9. ZEBRA/FZ commands GEANT/FZ 10. Data structure commands GEANT/DZ 11. Scanning commands GEANT/SCAN 12. Physics parameter commands GEANT/PHYSICS 13. List commands GEANT/LISTS The interactive version 3.21 contains an object oriented Motif-based user interface. It can be accessed specifying ‘m’ as workstation type. The full functionality of the X11 version remains available, while new Motif-specific features have been added. 3 The main ideas The GEANT data structures are considered as KUIP browsable classes and their contents as ‘objects’ on which one can perform actions (the GEANT commands). According to the Motif conventions, an object can be selected clicking the left button of the mouse (when the cursor is on the icon representing that object). XINT001 – 2 354
Clicking then on the right button of the mouse, a menu of possible commands will appear (double clicking on the left button the first action of this list will be executed); the selected command will perform the relative actions on the selected object. Such actions (like drawing, for example) can be executed either directly or via the use of an automatically opened Motif panel. Objects drawn in the graphics window can be ‘picked’ as well (for example, volumes, tracks, hits); clicking the right button when the cursor is on the selected object, a menu of possible actions on that object is displayed. Users can finally define Motif panels containing buttons corresponding to the most frequently used commands. An on-line help is available for any specific subject. 4 The Geant++ Executive Window It replaces the normal dialog window; it contains a Transcript Pad, where the text output of the executed commands is displayed, and an Input Pad, where the user can still type the desired commands in the old style. The Geant++ Main File Browser On the left side it displays a list of the GEANT data structures, of the available commands, file, macros and Zebra divisions used. Selecting one of them, the full list of icons representing the objects of that class is shown in the main area of the browser. Proceeding as described before, it is possible to perform actions on the classes (like create a new object) or on the objects belonging to them. It is possible to create menus of commands just clicking on the string ‘commands’ at the top line of the browser. The Geant++ Graphics Window Any object to be drawn in the graphics window can be stored in the current picture file (automatically opened after each NEXT command) via a call to IGPID (see Higz manual). It can be afterwards ‘picked’ as described before. In the case of commands executed via the use of Motif panels, some input values can be set with a slider ranging in the specifed range for the relative variable; moving the slider (after having clicked on the right-hand ‘activating box’) the relative action is performed in the graphics window when releasing the button of the mouse; when in ‘drag mode’, the action is performed while moving the slider (keeping the left button pressed): especially when double buffering has been selected, this can be useful for real time manipulations. 5 An Example Start your GEANT321 executable module (linked with GXINT321 and Motif1.2); type ‘m’ as workstation type; click the left button of the mouse after positioning the cursor on the string VOLU in the browser; click the left button of the mouse after positioning the cursor on any icon in the main area of the browser; click now the right button of the mouse and keep it pressed; move the mouse to select the action ‘Tree’ and release the button; the drawing of the logical tree will be displayed in the graphics window; position the cursor on the drawing of a box (containing a volume name) in the graphics window, click the right button and keep it pressed; release the button selecting the action ‘Dspec’; 355 XINT001 – 3
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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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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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where N Z(Z i ) A(A i ) ρ σ Avoga
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2 Method If the energy of the radia
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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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eV). At present the values recommen
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calculated dE dx − dE measured dx
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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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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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* 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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SMULS SOMULS STMULS DPHYS3 ILABS SL
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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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GPART, 13, 46, 61, 293 GPCXYZ, 40,
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PATCHY, 278 PCUTS, 399 PDIGI, 389 P
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