SoLID SIDIS He3 target collimator optimization

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Presentation transcript:

SoLID SIDIS He3 target collimator optimization Zhiwen Zhao and Tianbo Liu 2016/12/12

Design PAC35(2010) design

Current Design (Both block 7 Current Design (Both block 7.5 – 15deg, 15cm away,10cm thick tungsten powder) Plots shows pure tungsten blocking effect the smaller, the less blocking of gas, so closer to windows Need small beam pipe downstream After 2015 director review, material change from pure tungsten to tungsten powder by reducing density by from 19.3 to 11.3 The hadron trigger rate from both windows increase by about 30% collimators target

Current Collimator (Both block 7 Current Collimator (Both block 7.5 – 15deg, 15cm away,10cm thick kryptonite)

New Collimator 1 (Upstream block 7. 5 – 24deg, downstream block 7 New Collimator 1 (Upstream block 7.5 – 24deg, downstream block 7.5 – 15deg , 15cm away,10cm thick kryptonite)

New Collimator 2 (both block 7 New Collimator 2 (both block 7.5 – 24deg, 15cm away,10cm thick kryptonite)

New Collimator 3 (both block 7 New Collimator 3 (both block 7.5 – 15deg, 30cm away,10cm thick kryptonite)

New Collimator 4 (Upstream block 7. 5 – 24deg, downstream block 7 New Collimator 4 (Upstream block 7.5 – 24deg, downstream block 7.5 – 15deg, 30cm away,10cm thick kryptonite)

New Collimator 5 (both block 7 New Collimator 5 (both block 7.5 – 24deg, 30cm away,10cm thick kryptonite)