Beam Current Monitor with a High-Tc Current Sensor and SQUID at the RIBF
Beam Current Monitor with a High-Tc Current Sensor and SQUID at the RIBF
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RIBF 处配有高温电流传感器和 SQUID 的束流监控器
DOI：
10.1007/s10948-012-1943-0
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发表时间：
2012
影响因子：
1.8
通讯作者：
K. Kon
中科院分区：
文献类型：
--
作者：
T. Watanabe;N. Fukunishi;M. Kase;O. Kamigaito;S. Inamori;K. Kon
人们普遍认为，对高能重离子束的直流电流进行高分辨率的无损测量具有重要意义。为此，研制了一台高温超导量子干涉装置(SQUID)束流监测器，用于日本理研院放射性同位素束工厂(RIBF)。与其他现有设施不同，低振动脉冲管制冷机以一种减小系统尺寸和降低运行成本的方式冷却HTC制造，包括鱿鱼。结果，使用HTC SQUID监视器的原型，成功地测量了1μA Xe束(50 MeV/u)的强度，分辨率为100nA。此外，由于需要更高的分辨率，因此已经开始开发具有两个线圈的改进的HTC电流传感器。为了制备新型高温超导电流传感器，在99.6%的氧化镁陶瓷衬底上浸涂了一层Bi2-Sr2-Ca2-Cu3-Ox(Bi2223)薄膜，研制了一种新型高温超导电流传感器。这里报告了使用该机器生产的新型HTC电流传感器的结果。
It is widely recognized that non-destructive measurement at high resolution of the DC current of high-energy heavy-ion beams is important. Therefore, a high critical temperature (HTc) superconducting quantum interference device (SQUID) beam current monitor has been developed for use in the radioactive isotope beam factory (RIBF) at RIKEN in Japan. Unlike at other existing facilities, a low-vibration, pulse-tube refrigerator cools the HTc fabrications including the SQUID in such a way that the size of the system is reduced and the running costs are lowered. As a result, using a prototype of the HTc SQUID monitor, the intensity of a 1 μA Xe beam (50 MeV/u) was successfully measured with 100 nA resolution. Furthermore, since a higher resolution is necessary, development of an improved HTc current sensor with two coils has begun. A spraying machine was developed to fabricate the new HTc current sensor by dip-coating a thin layer of Bi2–Sr2–Ca2–Cu3–Ox(Bi-2223) onto a 99.6 % MgO ceramic substrate. Results from a new HTc current sensor produced using this machine are reported here.