用于低噪声、高频电子测量的低温探头
Cryogenic probe for low-noise, high-frequency electronic measurements
摘要：
介绍了一种低噪声、模块化低温探头的设计和性能，该探头适用于在宽范围的工作频率、温度和磁场上进行大范围的测量。探头的设计便于更换样品架和样品级放大器，再加上其特有的低传输和反射损耗，使该设计适用于高精度或低灵敏度测量。讨论了测量磁性隧道结散粒噪声的具体实例。我们强调了专门选择的各种设计特性，以扩展探头对测量技术（如核磁共振（NMR））的适用性。
英文摘要：
The design and performance of a low-noise, modular cryogenic probe, applicable to a wide range of measurements over a broad range of working frequencies, temperatures, and magnetic fields is presented. The design of the probe facilitates the exchange of sample holders and sample-stage amplifiers, which, combined with its characteristic low transmission and reflection loss, make this design suitable for high precision or low sensitivity measurements. The specific example of measuring the shot noise of magnetic tunnel junctions is discussed. We highlight various design characteristics chosen specifically to expand the applicability of the probe to measurement techniques such as nuclear magnetic resonance (NMR).
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