SQUID-Based Microwave Cavity Search for Dark-Matter Axions
SQUID-Based Microwave Cavity Search for Dark-Matter Axions
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DOI：
10.1103/physrevlett.104.041301
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发表时间：
2010-01-29
影响因子：
8.6
通讯作者：
Clarke, J.
中科院分区：
文献类型：
--
作者：
Asztalos, S. J.;Carosi, G.;Clarke, J.
MU eV质量范围内的轴子是一种可能的冷暗物质候选者，可以通过将它们转化为微波光子在沉浸在静态磁场中的共振腔中被探测到。我们报道了用超导第一级放大器(SQUID)代替传统的砷化镓场效应管放大器进行轴子搜索的第一个结果。这项实验排除了质量在3：3和3：53 eV之间的KSVZ暗物质轴子，并为利用近量子限制的SQUID放大器进行确定的轴子搜索奠定了基础。
Axions in the mu eV mass range are a plausible cold dark-matter candidate and may be detected by their conversion into microwave photons in a resonant cavity immersed in a static magnetic field. We report the first result from such an axion search using a superconducting first-stage amplifier (SQUID) replacing a conventional GaAs field-effect transistor amplifier. This experiment excludes KSVZ dark-matter axions with masses between 3: 3 mu eV and 3: 53 mu eV and sets the stage for a definitive axion search utilizing near quantum-limited SQUID amplifiers.