July 5, 2007 TJRMICE B1+B2 Only1 MICE Running with B1 and B2 Only Tom Roberts Illinois Institute of Technology.

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Presentation transcript:

July 5, 2007 TJRMICE B1+B2 Only1 MICE Running with B1 and B2 Only Tom Roberts Illinois Institute of Technology

July 5, 2007 TJRMICE B1+B2 Only2 Background The PSI Solenoid will be delayed, as will Q4-Q9 The question arises: Is it worthwhile to run with B1 and B2 only? The answer depends in part on the achievable rate

July 5, 2007 TJRMICE B1+B2 Only3 Description This simulation uses a model of the secondaries from the target, based on a G4beamline simulation of proton interactions in the target. The model includes: p, pi+, pi-, mu+, mu-, e+, e-, gamma; neutrons are omitted. Q1, Q2, Q3 are present but turned off B1 and B2 are set to the same momentum, 440 MeV/c (center of the pi+ peak) NOTE: I have since learned that B2 cannot go that high in field. ProtonAbsorber is removed TOF0 and TOF1 are in their standard positions Cherenkovs are present in an old position

July 5, 2007 TJRMICE B1+B2 Only4 Assumed Layout This proton happened to exit B1 at the wrong angle. The white line is the beam centerline.

July 5, 2007 TJRMICE B1+B2 Only5 Estimated Rates at TOF0 -- Positives Particle1.7e12 PoT1.0e9 PoT p24 MHz1.4 kHz pi+3.0 MHz2.0 kHz mu+1.8 MHz1.0 kHz e+0.07 MHz0 1.7E12 PoT is our traditional targeting assumption; 1.0E9 PoT is what was achieved last October.

July 5, 2007 TJRMICE B1+B2 Only6 Estimated Rates at TOF0 -- Negatives Particle1.7e12 PoT1.0e9 PoT pi-0.47 MHz0.27 kHz mu-0.47 MHz0.27 kHz e-0.09 MHz0.05 kHz 1.7E12 PoT is our traditional targeting assumption; 1.0E9 PoT is what was achieved last October.