Detailed design of ex-vessel neutron yield monitor for ITER
Detailed design of ex-vessel neutron yield monitor for ITER
复制标题
ITER舱外中子产额监测器详细设计
DOI：
10.1063/1.1779619
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
C. Walker
中科院分区：
文献类型：
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作者：
K. Asai;T. Iguchi;Kenichi Watanabe;J. Kawarabayashi;T. Nishitani;C. Walker
考虑到国际热核实验堆(ITER)主机组的最新设计，我们对满足ITER要求的容器外中子产额监测器进行了详细的设计考虑。监测系统由四个探测器模块组成，由几个不同灵敏度的235U裂变腔和石墨(或铍)中子慢化剂组成。我们还在诊断端口中选择了可能的空间，以将它们安装在适当的距离和对等离子体的中子屏蔽效应。通过蒙特卡罗中子输运计算，已经证实本系统可以覆盖热核实验堆实验中遇到的所有中子产额，包括在整个热核实验堆上不更换探测器的情况下进行的时间分辨率约为200 μ的S的在位定标。该系统还可以使用DT中子发生器在实际50 h的累积时间内以所需精度的10%进行校准。
Taking into consideration the latest design of the International Thermonuclear Experimental Reactor (ITER) main units, we have made the detailed design consideration for an ex-vessel neutron yield monitor to meet the ITER requirements. The monitoring system is constructed of four detector modules consisting of several 235U fission chambers with different sensitivities and graphite (or beryllium) neutron moderator. We also selected possible spaces in the diagnostic ports to install them at appropriate distances and neutron shielding effects from the plasma. Through Monte Carlo neutron transport calculations, it has been confirmed that the present system can cover all the neutron yields encountered in the ITER experiments including the in situ calibrations with a time resolution around 200 μs without detector replacement over the whole ITER experiments. This system can also be calibrated with 10% of required accuracies in a realistic 50 h of accumulation time using a DT neutron generator.