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6x1 mm Gaps. N has to be even. Previous version This version. Effective gas length Intrinsic capacitance Drift velocity L x v/C. 5 mm 6 mm (10/6) / 0.5 6/1 3.2 cm/ µs 4.5 cm/ µs 1 :: 1. Detector Concept. One ground “comb” milled from a solid Cu block
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6x1 mm Gaps • N has to be even Previous version This version Effective gas length Intrinsic capacitance Drift velocity L x v/C 5 mm 6 mm (10/6) / 0.5 6/1 3.2 cm/µs 4.5 cm/µs 1::1
Detector Concept • One ground “comb” milled • from a solid Cu block • Four signal “combs” • Ceramic insulation/alignment • pieces (machineable MACOR) Detector mechanical design: T. Loew, D. Cheng Vessel mechanical design: M. Hoff Fabrication design: N. Salmon, A. Mei
Assembly I. Signal comb Alignment features (explained below)
Assembly II. Ground planes Solid ground separates all 4 quadrants 2 mm Cu / 1 mm gap (i.e. 4 mm between plates) 40 mm depth < 10::1 aspect ratio - OK for machining
Assembly III. Alignment features