Digitisation of Drift- or MWP- Chambers

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| Geant 3.10  |               GEANT User's Guide              | HITS500  ##
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Author(s) :                                            Submitted: 01.10.81
Origin    : GEANT2                                       Revised: 28.05.86
                                  

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         | CALL GPDRIF (DETREP,HITREP,IOUT*) |
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Digitisation routine for a plane drift chamber.

DETREP(1)

number of wires

DETREP(2)

wire spacing

DETREP(3)

SIN(alpha) (alpha=angle of the normal to the wire with respect to axis 1)

DETREP(4)

COS(alpha)

DETREP(5)

distance of wire 1 from the origin

DETREP(6)

drift velocity (cm/nsec)

HITREP(1)

x coordinate of intersection

HITREP(2)

y coordinate of intersection

IOUT(1)

wire number

IOUT(2)

drift time (signed to avoid left/right ambiguity)

         +------------------------------------------------------+
         | CALL GCMWPC (DETREP,HITREP,IOUT*) |
         +------------------------------------------------------+
                                  

Routine to compute one or two digitisations produced by a hit on a cylindrical MWPC.

DETREP(1)

number of wires

DETREP(2)

wire spacing (radians)

DETREP(3)

dtheta/dz along the wires

DETREP(4)

theta of a point on wire 1

DETREP(5)

z of a point on wire 1

>DETREP(6)

gap width

HITREP(1)

theta coordinate of intersection

HITREP(2)

z coordinate

HITREP(3)

dtheta/dr

HITREP(4)

dz/dr

IOUT(1)

wire number (-1-missing)

IOUT(2)

cluster size

IOUT(3)

wire number of second cluster if any

IOUT(4)

cluster size

         +------------------------------------------------------+
         | CALL GPMWPC (DETREP,HITREP,IOUT*) |
         +------------------------------------------------------+
                                  

Digitisation routine for a plane MWPC.

DETREP(1)

number of wires

DETREP(2)

wire spacing

DETREP(3)

SIN(alpha) (alpha=angle of the normal to the wire with respect to axis 1)

DETREP(4)

COS(alpha)

DETREP(5)

distance of wire 1 from the origin

DETREP(6)

gap width

HITREP(1)

x coordinate of intersection

HITREP(2)

y coordinate

HITREP(3)

dx/dz

HITREP(4)

dy/dz

IOUT(1)

wire number

IOUT(2)

cluster size