MICE Target Source Calculations
This report outlines the computational strategies for optimizing target acceptance and muon production in particle physics experiments at the Illinois Institute of Technology. Key steps include selecting a beamline tune, determining the target acceptance parameters (Pmin, Pmax, x'min, x'max, y'min, y'max), and utilizing simulation tools such as LAHET, MARS, and g4beamline (Geant4) to analyze pion production per proton on target. It examines the effect of tunable beamline parameters on the yield of muons produced, particularly focusing on operational variables like beam density and target dip height.
MICE Target Source Calculations
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Presentation Transcript
MICE Target Source Calculations Tom Roberts Illinois Institute of Technology March 30, 2004
Outline of Computation • Select beamline tune, determine an enclosing target acceptance (Pmin, Pmax, x’min, x’max, y’min,y’max) • Use LAHET, MARS, and g4beamline (Geant4) to determine pi+ that enter the target acceptance per proton on target • Use g4beamline to generate 20M pi+ into the target acceptance, and determine how may good mu+ they produce. • Model the ISIS beam and target to determine the rate of protons on target. • Put the above values together to determine the absolute rate of good-mu+/millisecond.
Target Particle Production Particles into acceptance per millisecond of good target.
Model of Target and ISIS Beam * Estimate of: (beam density at target)/(average beam density)
Results JAN04 tune, 6π mm-rad input emittance, no LH2, no RF. • Major Variables: • Beamline tune can vary rates by a factor of ~6 (tuning for lower input emittance yields higher good mu+/proton) • Target dip height directly affects protons on target (must keep ISIS losses within bounds) Because of the large variations in yield for different tunes, and the need to keep ISIS losses to a minimum, an easily- adjustable insertion depth for the target is essential.
