KOPIO用Shashlyk量热仪的研制
Development of Shashlyk Calorimeter for KOPIO
摘要：
一个Shashlyk量能器原型的KOPIO实验已经建成和实验测试。对0.5- 2.0GeV/c正电子的能量分辨率约为4%/sqrt（E（GeV））。基于这一结果以及特殊测量的结果，开发了Shashlyk模块响应的Monte-Carlo模型。该模型包括簇射演化、闪烁体板中的光收集、光纤中的光衰减、光电探测器的量子效率、读出系统中的阈值和噪声的影响，与实验结果一致。讨论了将Shashlyk能量分辨率提高到3%/sqrt（E（GeV））的可能性。
英文摘要：
A Shashlyk calorimeter prototype for the KOPIO experiment has been constructed and experimentally tested. The energy resolution of about 4%/sqrt(E(GeV)) for 0.5-2.0 GeV/c positrons was obtained. Based on this results as well as on the results of special measurements, a Monte-Carlo model of the Shashlyk module response was developed. This model, including the effects of shower evolution, light collection in scintillator plates, light attenuation in fibers, quantum efficiency of the photodetector, thresholds and noises in the readout system is consistent with experimental results. Possible improvment of the Shashlyk energy resolution up to 3%/sqrt(E(GeV)), the level required by KOPIO experiment, are discussed.
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