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 here
  • 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
--------------
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