Radiation tolerance of straw-tracker read-out system for COMET experiment
Radiation tolerance of straw-tracker read-out system for COMET experiment
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DOI：
10.1109/nssmic.2016.8069866
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发表时间：
2016-10
期刊：
影响因子：
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通讯作者：
K. Ueno;E. Hamada;M. Ikeno;S. Mihara;Y. Nakazawa;H. Nishiguchi;T. Uchida;Ye Yang;H. Yamaguchi;H. Yoshida
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文献类型：
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作者：
K. Ueno;E. Hamada;M. Ikeno;S. Mihara;Y. Nakazawa;H. Nishiguchi;T. Uchida;Ye Yang;H. Yamaguchi;H. Yoshida
J-PARC的COMET实验旨在寻找无中微子μ子到电子转换的带电轻子味违反过程。目标灵敏度将提高10000倍至电流极限。为了达到目标灵敏度，我们研制了一种具有很高动量分辨率的吸管跟踪器。为了精确地读出跟踪器的信号，还需要一个最佳的前端电子器件，我们开发了称为ROESTI的读出电子电路板。对于ROESTI，我们需要考虑辐射耐受性，因为板将安装在中子和伽马射线丰富的环境中。利用PHITS软件计算了器件的辐射水平，选择了器件的抗辐射能力，并考虑了FPGA的单粒子翻转对策。使用原型，中子和γ射线辐照试验已进行和辐射耐受性进行了研究。本文介绍了用PHITS计算进行的最新辐射研究和ROESTI样机的辐照试验结果。
The COMET experiment at J-PARC aims to search for the charged lepton flavor violating process of neutrinoless muon to electron conversion. The goal sensitivity is to be improved by a factor of 10000 to the current limit. In order to achieve the goal sensitivity, we have developed a straw tube tracker as an electron detector which has very high momentum resolution. To read out the signal from the tracker precisely, an optimal front-end electronics is also needed, and we have developed the readout electronics board called ROESTI. For the ROESTI, we need to consider radiation tolerance because the board will be installed in neutron and gamma-ray rich environment. We calculated radiation level with PHITS, and radiation tolerant parts have been selected and countermeasure against single event upset in FPGA was considered. Using the prototype, neutron and gamma-ray irradiation tests have been performed and radiation tolerance has been investigated. In this paper, we describe the latest radiation study with PHITS calculation and the results of irradiation tests of the ROESTI prototype.