Radiation Tolerance of Aluminum Microwave Kinetic Inductance Detector
Radiation Tolerance of Aluminum Microwave Kinetic Inductance Detector
复制标题
铝制微波动感电感探测器的辐射耐受性
DOI：
10.1007/s10909-016-1523-y
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
T. Yamashita
中科院分区：
文献类型：
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作者：
K. Karatsu;A. Dominjon;T. Fujino;T. Funaki;M. Hazumi;F. Irie;H. Ishino;Y. Kida;T. Matsumura;K. Mizukami;M. Naruse;T. Nitta;T. Noguchi;N. Oka;S. Sekiguchi;Y. Sekimoto;M. Sekine;S. Shu;Y. Yamada;T. Yamashita
微波动力学电感探测器（MKID）是未来LiteBIRD等卫星任务的焦平面探测器候选器件之一。对于MKID的空间使用，辐射耐受性是发射前需要表征的挑战之一。在千叶的重离子医用加速器上，用160 MeV的质子束辐照硅衬底和蓝宝石衬底上厚度为50 nm的铝（Al）MKID。总水当量吸收剂量为10 krad，应模拟拉格朗日点L2处5年观测的最差辐射吸收。我们测量了这些MKID在照射前后的特性。我们发现准粒子的谐振腔品质因子、响应率和复合时间没有明显的变化。电噪声等效功率的变化也进行了评估，并没有发现在W/的噪声水平的显着增加。
Microwave kinetic inductance detector (MKID) is one of the candidates of focal plane detector for future satellite missions such as LiteBIRD. For the space use of MKIDs, the radiation tolerance is one of the challenges to be characterized prior to the launch. Aluminum (Al) MKIDs with 50 nm thickness on silicon substrate and on sapphire substrate were irradiated with a proton beam of 160 MeV at the heavy ion medical accelerator in Chiba. The total water-equivalent absorbed dose was10 krad which should simulate the worst radiation absorption of 5 years observation at the Lagrange point L2. We measured characteristics of these MKIDs before and after the irradiation. We found no significant changes on resonator quality factor, responsivity, and recombination time of quasi-particles. The change on electrical noise equivalent power was also evaluated, and no significant increase was found at the noise level ofW/.