标题： 一种用于外差轴子探测的原型混合模式腔 显示英文标题

标题： A Prototype Hybrid Mode Cavity for Heterodyne Axion Detection

摘要： 在轴子探测的外差方法中，轴子暗物质会引发微波腔中两种模式之间的跃迁，从而产生参数增强的信号功率。 我们描述了一个专为外差检测优化的常规导体腔体的制造和表征。 腔壁上的波纹支持线性极化的混合模式，这可以最大化信号功率同时强烈抑制噪声。 我们展示了调谐机制，使得一种模式的频率可以在4 MHz范围内扫描，同时至少抑制交叉耦合噪声80 dB。 一个未来与我们的原型具有相同几何结构的超导腔体有可能探测到超越天体物理界限的数量级。 显示英文摘要

摘要： In the heterodyne approach to axion detection, axion dark matter induces transitions between two modes of a microwave cavity, resulting in a parametrically enhanced signal power. We describe the fabrication and characterization of a prototype normal conducting cavity specifically optimized for heterodyne detection. Corrugations on the cavity walls support linearly polarized hybrid modes which maximize the signal power while strongly suppressing noise. We demonstrate tuning mechanisms which allow one mode's frequency to be scanned across a 4 MHz range, while suppressing cross-coupling noise by at least 80 dB. A future superconducting cavity with identical geometry to our prototype would have the potential to probe orders of magnitude beyond astrophysical bounds.