10ℏ superconducting quantum interference device amplifier for acoustic gravitational wave detectors
10ℏ superconducting quantum interference device amplifier for acoustic gravitational wave detectors
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10ℏ 声引力波探测器用超导量子干涉器件放大器
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
S. Vitale
中科院分区：
文献类型：
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作者：
P. Falferi;M. Bonaldi;M. Cerdonio;R. Mezzena;G. Prodi;A. Vinante;S. Vitale
通过加性和反作用噪声的测量，我们估计了为下一代声学宽带引力波探测器开发的两级超导量子干涉器件（SQUID）放大器的噪声温度。在 8.9 kHz 和 T≤0.3 K 时评估的最低噪声温度约为 4 μK，相当于量子极限噪声温度的 10 倍。由于用于反作用噪声测量的高 Q 电谐振器在许多方面的行为类似于声学引力波探测器构成的输入负载，因此该 SQUID 放大器一旦安装在探测器上，预计将保持相同的噪声性能。
From measurements of additive and back action noise, we estimate the noise temperature of a two-stage superconducting quantum interference device (SQUID) amplifier developed for the acoustic wide-band gravitational wave detectors of the next generation. The minimum noise temperature evaluated at 8.9 kHz and T≤0.3 K is about 4 μK and corresponds to 10 times the quantum-limited noise temperature. As the high-Q electrical resonator used for the back action noise measurements behaves in many respects like the input load constituted by an acoustic gravitational wave detector, this SQUID amplifier is expected to keep the same noise performance once installed on the detector.