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During the JPARC TREK Collaboration meeting in Saskatchewan, discussions centered around determining the ideal fiber size for target segmentation. The target size is fixed at f75, enabling the unique segmentation of the fiber. Key factors, such as K+ stopping position, target radius, and GEM trackers, were considered to decide on a fiber size of approximately 3mm to achieve an RMS of 0.1 cm from the target size. The aim is for the RMS of rdiff to be comparable to tdiff for effective performance.
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Sep. 2, 2007 JPARC TREK Collaboration meeting at Saskatchewan Comment for target fiber size
fiber size is to be determined. • Target size is fixed to be f75. • From this value, segmentation of fiber is uniquely determined. s [K+ stopping pos. (hit-track) ]= √ s [rdiff ]2 + s [tdiff ] 2rdiff = K+ stopping pos. (true-hit)(determined by fiber size)tdiff = K+ stopping pos. (true-track)(determined by target radius and GEM trackers) • RMS of tdiff is to be 0.1 cm from target size f75. • s(rdif) should be comparable to s(tdif) • If RMS of rdiff is fixed, adequate fiber size is determined ~3mm. phi 100 phi 60 Km3 0.12 cm in RMS 0.07 cm in RMS tdiff tdiff rdiff
