User parameters for detector element

The standard GEANT geometry information and material parameters usually is not enough to describe behaviour of detector element. For example, to describe signals from the Cathode Strip Chamber it is needed to know the voltage, strip width, distances between wires and so on. Sometimes it is possible but is reasonable to do that. For example, the readout of the Hadron calorimeter towers in and is not matched with real geometry used for it. In order to store this information (UPAR(1:NUPAR) into the standard constant data GEANT structure and to retrieve it in CMSIM we use routines:

        GSDETU (IUSET, IUDET, NUPAR, UPAR)
and     GFDETU (IUSET, IUDET, NUPAR, UPAR)

This information is the detector dependent. As an example below we present the user information used for the Cathode Strip chambers:

....
  0.15000E-01   #. SGCSCY     -   strip resolution
  0.73323       #. SGCSCZ     -   wire resolution
           40.  #. NSTRIP     -   number of strips in one chamber/2-1
            2.  #. NNODES     -   number of strips 2*nnodes+1 around hit
           10.  #. Nowgrp     -   No. of wire in group
            1.  #. NOFLOA     -   No. of floating strips
  0.25400       #. D_ANOD     -   Anods Step
  0.25000       #. D_ACAT "h" -   Anode - Cathode spacing
   35000.       #. GASGain    -   gas gain
   2800.0       #. VOLTAGE    -   CSC Voltage
   29.000       #. PHI_TILT   -   tilt angle for CSC wire slope
  0.10000E-01   #. RMScal     -   calibration ambiguity
  0.50000       #. F_att      -   e- attraction in gas
  0.30420       #. Fracqs     -   fraction of charge collected due to shaping
  0.10000       #. ADCoun     -   ADC count (fC)
  0.15000E-02   #. RADWIR     -   Anode wire radius
   50.000       #. TGSTIM     -   Fast shaper peacking time (ns)
   100.00       #. TIMEPS     -   Peacking Time of Ampliefier & Shaped Chamber
                                  signal (ns)
...

In order to define information in TZ ``GEAN'', for example for Hadron calorimeter tower definition, we use the following instruction:

...
     #. Defintion of time slices, Phi and eta towers (degrees)
     #.              packing for digitisations
     #.                      dtime  phimin dphi  neta  etamin etamax
  :DETU  :HCAL  :HBS*   41   10.E-9   0.0   5.    31.  0.     0.087  0.174
                                                       0.261  0.348  0.435
                                                       0.522  0.609  0.696
                                                       0.783  0.870  0.957
                                                       1.044  1.131  1.218
                                                       1.305  1.392  1.479
                                                       1.566  1.653  1.740
                                                       1.827  1.914  2.001
                                                2.088  2.175  2.262  2.436
                                                       2.610  2.805  3.000
                                 100.E-9 1.0E5 90.0E5 155.E5 180.E5 380.E5
...