Electrodynamic theory for the operation principle of a superconducting kinetic inductance stripline detector

Electrodynamic theory for the operation principle of a superconducting kinetic inductance stripline detector
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超导动感带状线探测器工作原理的电动力学理论

DOI:
10.1088/1742-6596/1054/1/012055
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发表时间:
2018
期刊:
Journal of Physics: Conference Series
影响因子:
--
通讯作者:
Ishida Takekazu
Ishida Takekazu
中科院分区:
--
文献类型:
--
作者:
Koyama Tomio;Ishida Takekazu

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基于超导电磁学,研究了由超导纳米线带状线构成的动态电感探测器中电压信号的产生和传输。结果表明,在该探测器中沿带状线传播的电信号可以看作是Swihart模。导出了描述该探测器中电压脉冲产生和传输的方程。当超导凝聚体的密度在超导纳米线的一个小区域内发生时空变化时,就会产生一对具有相反极性的电压脉冲。电压脉冲以斯威哈特速度沿带状线以相反的方向传播。该模型很好地描述了电流偏置动态电感探测器(CB-KID)的辐射特性。
Generation and transmission of voltage signals in a kinetic inductance detector made of a superconducting nanowire stripline is investigated on the basis of superconducting electromagnetism. We show that electric signals traveling along the stripline in this detector can be regarded as a Swihart mode. An equation which can describe the generation and transmission of voltage pulses in this detector is derived. A pair of voltage pulses with opposite polarities are created when a spatiotemporal variation in the density of the superconducting condensate occurs in a small region of this superconducting nanowire. The voltage pulses propagate along the stripline in the directions opposite to each other with the Swihart velocity. The characteristic of the radiation detector named current-biased kinetic inductance detector (CB-KID) is well described by our model.
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