6.6.5 FORWARD/BACKWARD TAGGERS

The following example shows a set of tagger in the forward/backward region. They sit at z 180 cm, between a radius of 135 and 152 cm. The energy is poor: the relative error is 150%/$\sqrt {E}$. The efficiency is 95 %, and the threshold is 1.0 GeV. The type of the taggers is 1, hence they will detect photons and electrons as showers. Since parameters are given for minimum ionising detection, such particles will also be detected, with an average signal equivalent to what a 1.0 GeV shower would deposit. The threshold for mips is 1.0 GeV, and the efficiency is 45 %. Note that charged hadrons will also be seen as mip's. It is modular in $\phi$ and R (SHOWER_POS_MEAS=1), with 12 modules in $\phi$ and one in R. The first module starts at 15.0 degrees.

TYPE: FORWARD_TAGGERS
      LAYER:TAG
         GEOMETRY:    Z=180.0, RMIN=135.0, RMAX=152.0
         MATERIAL:    X0=3.6  , A= 98, INTLEN=0.12
         MEASUREMENT: TYPE=1,ROOT_E_COEFF=1.5, CONST_TERM=0.0
                      EFFI=0.95,THRES=0.5,
                      SHOWER_POS_MEAS=1, NCELL1=12, NCELL2=1,
                      PHI_FST_CELL=15.0,
                      MIP_AVE_SIGN=1.0, MIP_SIGN_WIDTH=1.0,
                      MIP_THRES=1.0, MIP_EFF=0.45