The HKS detector package is designed to identify Ks from p, , e backgrounds and to measure their momentum with a resolution of 2 . In order to realize the requirements, the HKS detector package consists of drift chambers, time-of-flight walls, aerogel Cerenkov counters, and water Cerenkov counters. Table 11 summarizes the HKS detector package and their parameters.
Nomenclature | Size | Comments |
Drift chamber | ||
HDC1 | xx'uu'(+30 deg)vv'(-30 deg) | |
5 mm drift distance | ||
HDC2 | xx'uu'(+30 deg)vv'(-30 deg) | |
5 mm drift distance | ||
Time of flight wall | ||
HTF1X | 7.5 cm 17-segments, H1949 | |
HTF1Y | 3.5 cm 9-segments, H1949 | |
HTF2X | 9.5 cm 18-segments, H1949 | |
Cerenkov counter | ||
HAC1 | n = 1.055 hydrophobic aerogel | |
16 5" PMT | ||
HAC2 | n = 1.055 hydrophobic aerogel | |
16 5" PMT | ||
HWC1 | 10 cm 18-segments, H1161 | |
HWC2 | 10 cm 18-segments, H1161 | |
Water with wavelength shifter |
Detail description of each detector is given in following subsections.