MC status

This is the place where starting collecting ideas on the BeamTest setups and improvements in the MC generation.

 beamtest06

• The geometry of the PS setup actually used is described very well by Stefan
• Other setups are in progress.

• • The requirements come from the following list:

• • Photon runs
    ------------
    2 cerenkov
    1 large plastic (1cm thick) for rate monitoring
    2 finger counters (2mm thickness, overlap of 1x1cm) for triggering
    1 large plastic (1cm thick) with a 24mm diameter hole centered on the
    beam for vetoing background
    2 XY silicon layers before the magnet
    1 magnet
    2 XY silicon layers after the magnet
    1 plastic (1cm thick) after the last silicon for triggering*          

• • Comment: we might deplete the 2nd cerenkov to reduce X0 if we realize that the photon trigger is efficient

• • Electron runs
    ---------------
     2 cerenkov
     1 large plastic (1cm thick) for rate monitoring
     2 finger counters (2mm thickness, overlap of 1x1cm) for triggering
     1 large plastic (1cm thick) with a 24mm diameter hole centered on the
     beam for vetoing background
     1 XY silicon layers before the magnet
     1 magnet OFF
  • comment: we might need a trigger scintillator in coincidence with the fingers just before the CU
  • Positron runs  

          --------------

         2 cerenkov

                   1 large plastic (1cm thick) for rate monitoring
                   2 finger counters (2mm thickness, overlap of 1x1cm) for triggering
                   1 large plastic (1cm thick) with a 24mm diameter hole centered on the
                     beam for vetoing background
                   1 XY silicon layers before the magnet
                   1 magnet ON
                   1 EM CAL (40cm NaI) to veto gammas
                   1 plastic after the annihilator before the CU to veto electron/positron Proton Runs*  

Proton runs

          --------------
          2 cerenkov
          1 large plastic (1cm thick) for rate monitoring
          2 finger counters (2mm thickness, overlap of 1x1cm) for triggering
          1 large plastic (1cm thick) with a 24mm diameter hole centered on the
          beam for vetoing background
          1 XY silicon layers before the magnet
          1 magnet OFF

          comment: we might need a trigger scintillator in coincidence with the
          fingers just before the CU

         general comment: the veto counter (plastic with hole) might be removed
         if background is measured to be low enough