上转换环路振荡器轴子探测实验：利用圆柱形微波腔开展的精密频率干涉式轴子暗物质搜寻
UPconversion Loop Oscillator Axion Detection experiment: A precision frequency interferometric axion dark matter search with a Cylindrical Microwave Cavity
AI总结：
本研究提出基于单个圆柱微波腔双模振荡器的轴子探测新方法，利用轴子-光子耦合实现低质量轴子上转换探测，首批室温实验给出两个能区的轴子耦合排除限，且低温方案有望拓展参数空间探测能力。
摘要：
本文展示了室温台式相敏轴子晕镜实验的首批实验结果。该技术利用单个腔中激发的两个光子谐振器-振荡器之间的轴子-光子耦合，使低质量轴子被上转换到微波频率，成为微波载波上的频率调制源。这种轴子探测新路径相比传统晕镜方法具有一定优势，尤其适用于搜寻能量低于1 μeV（240 MHz）的轴子——该能区需要大体积磁体。在双模振荡器的核心部分，一个可调谐圆柱形微波腔支持一对正交偏振模式（TM₀,₂,₀和TE₀,₁,₁），通常可同时对质量对应于微波频率之和与差的轴子产生灵敏度。经过两个半小时的测量，实验结果给出了7.44–19.38 neV区间的轴子排除限，排除了3×10⁻³ 1/GeV以上的最小耦合强度；同时在74.4–74.5 μeV区间给出排除限，排除了10⁻² 1/GeV以上的最小耦合强度。研究表明，采用该技术的最先进频率稳定低温实现方案，有望在大范围内的轴子参数空间达到具有竞争力的限制水平。
英文摘要：
First experimental results from a room-temperature table-top phase-sensitive axion haloscope experiment are presented. The technique exploits the axion-photon coupling between two photonic resonator-oscillators excited in a single cavity, allowing low-mass axions to be upconverted to microwave frequencies, acting as a source of frequency modulation on the microwave carriers. This new pathway to axion detection has certain advantages over the traditional haloscope method, particularly in targeting axions below 1 $μ$eV (240 MHz) in energy where high volume magnets are necessary. At the heart of the dual-mode oscillator, a tunable cylindrical microwave cavity supports a pair of orthogonally polarized modes ($\text{TM}_{\text{0,2,0}}$ and $\text{TE}_{\text{0,1,1}}$), which, in general, enables simultaneous sensitivity to axions with masses corresponding to the sum and difference of the microwave frequencies. The results place axion exclusion limits between 7.44 - 19.38 neV, excluding a minimal coupling strength above $3\times 10^{-3}$ 1/GeV, and between 74.4 - 74.5 $μ$eV, excluding a minimal coupling strength above $10^{-2}$ 1/GeV, after a measurement period of two and a half hours. We show that a state-of-the-art frequency-stabilized cryogenic implementation of this technique may achieve competitive limits in a large range of axion-space.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
