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| 2 | SUBROUTINE GUKINE |
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| 3 | * |
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| 4 | * Generates Kinematics for primary track |
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| 5 | * |
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| 6 | * Data card Kine : Itype Ekine theta phi rbeam |
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| 7 | * |
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| 8 | * rbeam : size of the random beam extension in fraction of 0.5*calorYZ |
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| 9 | * |
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| 10 | #include "geant321/gcbank.inc" |
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| 11 | #include "geant321/gcflag.inc" |
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| 12 | #include "geant321/gconst.inc" |
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| 13 | #include "geant321/gckine.inc" |
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| 14 | * |
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| 15 | #include "geomate.inc" |
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| 16 | #include "runinfo.inc" |
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| 17 | * |
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| 18 | DIMENSION VERTEX(3),PLAB(3) |
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| 19 | dimension rndm(2) |
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| 20 | * |
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| 21 | * random in YZ ? |
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| 22 | if ((pkine(4).lt.0.).or.(pkine(4).gt.1.)) pkine(4) = 0. |
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| 23 | rbeam = pkine(4)*0.5*YZABSO |
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| 24 | call GRNDM (rndm,2) |
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| 25 | * |
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| 26 | VERTEX(1)=XVERT |
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| 27 | VERTEX(2)=YVERT + (2*rndm(1)-1.)*rbeam |
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| 28 | VERTEX(3)=ZVERT + (2*rndm(2)-1.)*rbeam |
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| 29 | * |
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| 30 | CALL GSVERT(VERTEX,0,0,0,0,NVERT) |
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| 31 | * |
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| 32 | JPA = LQ(JPART-IKINE) |
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| 33 | XMASS = Q(JPA+7) |
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| 34 | PMOM = SQRT(PKINE(1)*(PKINE(1)+2*XMASS)) |
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| 35 | THETA = PKINE(2)*DEGRAD |
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| 36 | PHI = PKINE(3)*DEGRAD |
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| 37 | C |
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| 38 | PLAB(1)=PMOM*SIN(THETA)*COS(PHI) |
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| 39 | PLAB(2)=PMOM*SIN(THETA)*SIN(PHI) |
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| 40 | PLAB(3)=PMOM*COS(THETA) |
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| 41 | * |
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| 42 | * store the charge of primary particle in a free location |
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| 43 | pkine(10) = Q(JPA+8) |
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| 44 | C |
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| 45 | CALL GSKINE(PLAB,IKINE,NVERT,0,0,NT) |
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| 46 | * |
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| 47 | * *** Kinematics debug |
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| 48 | IF (IEVENT.EQ.1.OR.IDEBUG.NE.0) CALL GPRINT('KINE',0) |
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| 49 | * |
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| 50 | END |
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