Page History

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• • Electron runs
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     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  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*  

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