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MMS in front of the instrument, with ACD tile behind it. Important:**Tile "4" may have to be moved, because the beam has to shoot in its center, to eliminate the possibility of beam to physically miss the tile. ****Beam: 5 GeV normal incidence "pensilpencil" proton beam. Needed statistics~ 1M protons. If more - better. The best to provide reliable "pencil" beam would be to have 1cm by 1cm plastic scintillator attached directly in the center of MMS and included in the trigger. Desirably to increase the thickness of MMS (say have there 4 layers) to increase the effect - is there anything against it?
If the beam energy goes up to 10 GeV, the effect of background creation goes down by a factor of 2-2.5
Trigger
external beam trigger. Should be clean and free from "empty" triggers. Actually empty triggers will be identified by CU
Very important is to have a "pencil" beam (see above in "Experimental setup" section) to eliminate the events when incident particle misses the ACD due to the beam divergency. Small (1cm by 1cm) triggering scintillator attached just in front of MMS would do the best job
Data Taking Configurations and Relevant Runs
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