4.3 Article

A novel hermetic detection system of KAPAE for measuring multiphoton decays of positronium

期刊

JOURNAL OF INSTRUMENTATION
卷 18, 期 3, 页码 -

出版社

IOP Publishing Ltd
DOI: 10.1088/1748-0221/18/03/P03011

关键词

Gamma detectors (scintillators, CZT, HPGe, HgI etc); Calorimeters; Dark Matter detectors (WIMPs, axions, etc.)???????

向作者/读者索取更多资源

The detection system of KAPAE provides comprehensive coverage and fine segmentation for studying multi-photon decays of positronium, detecting rare decays, and exploring exotic decays. The system includes a multi-layered trigger and a gamma-ray detector with a nitrogen environment and fine segmented BGO crystal scintillators. The performance and fabrication of the KAPAE detector are presented in this paper.
The detection system of the Kyungpook National University Advanced Positronium Annihilation Experiment (KAPAE) has a 4p coverage with fine segmentation for measuring multi -photon decays of positronium to improve the charge (C), charge-parity (CP), and charge-parity-time reversal (CPT) violations in lepton sector as well as for studying rare decays. In addition, various exotic decays of positronium can be studied with the KAPAE detector. In the KAPAE, all aspects of the detector design, fabrication, and data analysis for physics studies related to positronium annihilation are covered. In this paper, we describe the above-mentioned first fully assembled detection system developed for KAPAE, which consists of a trigger and a gamma-ray detector. The newly proposed multi-layered trigger consists of a Na-22 positronium source deposited on a plastic scintillator and a silicon photomultiplier (SiPM), and the gamma-ray detector contains an aerogel at the centre in a nitrogen environment. The gamma-ray detector minimizes pile-up events by fine segmentation of 196 Bi4Ge3O12 (BGO) crystal scintillators, whose scintillation lights from both sides are readout by the SiPM. The signals of a 392-channel SiPM are fed to a preamplifier followed by a 65 MHz flash analog-to-digital converter (FADC). In this paper, the KAPAE detector design, fabrication, and performance are presented.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.3
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据