Measurements and PHITS Monte Carlo Estimations of Residual Activities Induced by the 181 MeV Proton Beam in the Injection Area at J-PARC RCS Ring
Measurements and PHITS Monte Carlo Estimations of Residual Activities Induced by the 181 MeV Proton Beam in the Injection Area at J-PARC RCS Ring
复制标题
J-PARC RCS 环注入区 181 MeV 质子束引起的残余活动的测量和 PHITS 蒙特卡罗估计
DOI：
10.7566/jpscp.8.012017
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
M. Kinsho
中科院分区：
文献类型：
--
作者：
E. Yamakawa;M. Yoshimoto;M. Kinsho
在J-PARC的RCS环注入区，矩形陶瓷导管处的残余伽马剂量随着输出束流功率的增加而增加，特别是在电荷交换箔的下游。为了研究高残余活度的原因，在注入181 MeV质子束能量的情况下，用GM测量仪和便携式锗（Ge）半导体探测器测量了管道外表面产生的残余伽马剂量和放射源。通过这些测量，揭示了核反应产生的放射源引起了注入区域的高活度。为了更好地理解注入区的现象，使用PHITS蒙特卡罗代码进行了各种模拟。计算得到的放射源分布和残余伽马剂量率与实测结果一致。在这种一致性下，电荷交换箔上核反应产生的二次中子和质子是导致注射区陶瓷管高残余伽马剂量的主要原因。这些测量和计算是揭示箔周围高残留剂量原因的独特方法。该研究对未来使用剥离箔的高强度质子加速器具有重要意义。
At the injection area of the RCS ring in the J-PARC, residual gamma dose at the rectangular ceramic ducts, especially immediately downstream of the charge-exchanged foil, has increased with the output beam power. In order to investigate the cause of high residual activities, residual gamma dose and radioactive sources produced at the exterior surface of the ducts have been measured by a GM survey meter and a handy type of Germanium (Ge) semiconductor detector in the case of 181 MeV injected proton beam energy. With these measurements, it is revealed that the radioactive sources produced by nuclear reactions cause the high activities at the injection area. For a better understanding of phenomena in the injection area, various simulations have been done with the PHITS Monte Carlo code. The distribution of radioactive sources and residual gamma dose rate obtained by the calculations are consistent with the measurement results. With this consistency, secondary neutrons and protons derived from nuclear reactions at the charge-exchanged foil are the dominant cause to high residual gamma dose at the ceramic ducts in the injection area. These measurements and calculations are unique approaches to reveal the cause of high residual dose around the foil. This study is essential for the future of high-intensity proton accelerators using a stripping foil.
双层效应对 J-PARC RCS 新开发的 HBC 箔寿命的影响
DOI：
--
发表时间：
2010
期刊：
Nuclear Instruments and Methods in Physics Research A A613
影响因子：
--
作者：
I.Sugai;Y.Takeda;M.Oyaizu;H.Kaweakami;Y.Irie;A.Takagi;H.Hattori;K.Kawasaki
通讯作者：
K.Kawasaki
影响因子：
1.2
作者：
Sato, Tatsuhiko;Niita, Koji;Sihver, Lembit
通讯作者：
Sihver, Lembit