Superconducting resonator and a cryogenic GaAs field‐effect transistor amplifier as a single‐ion detection system
Superconducting resonator and a cryogenic GaAs field‐effect transistor amplifier as a single‐ion detection system
复制标题
超导谐振器和低温 GaAs 场效应晶体管放大器作为单离子检测系统
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
G. Dunn
中科院分区：
文献类型：
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作者：
S. Jefferts;T. Heavner;P. Hayes;G. Dunn
介绍了一种能够检测单个离子的电流测量系统。该探测器工作频率为900 kHz，采用高Q值（Q 8500）的超导电感和噪声温度小于0.3 K的低温砷化镓场效应晶体管（FET）放大器。本文介绍了场效应管的噪声测量以及超导电感的结构细节。
A current measuring system capable of detecting single ions is described. The detector operates at a frequency of nominally 900 kHz and utilizes a superconducting inductor with high Q(Q≊8500) and a cryogenic GaAs field‐effect transistor (FET) amplifier with noise temperature less than 0.3 K. Noise measurements of the FET are presented along with details of the construction of the superconducting inductor.