ALPHA第一阶段设计：一款用于10--20 GHz暴胀后轴子的等离子体 haloscope
Design of ALPHA Phase I: A Plasma Haloscope for 10--20 GHz Post-Inflation Axions
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中文总结 AI 辅助
ALPHA 实验第一阶段设计了线阵列等离子体谐振器，用于搜寻10--20 GHz（约40--80 μeV）的暴胀后 QCD 暗物质轴子，以突破传统微波腔的尺寸限制，实现宽带灵敏度。
中文摘要 AI 辅助
轴子是一种动机充分的假想粒子，可同时解决强CP问题与暗物质之谜，近期的暴胀后宇宙学模拟支持其质量大于40 μeV。等离子体 haloscope 是一种有望达到该质量范围理论优选灵敏度的实验方法。ALPHA 是由耶鲁大学赖特实验室主办的国际合作项目，致力于开发等离子体 haloscope 以搜寻量子色动力学（QCD）暗物质轴子。本文介绍了 ALPHA 实验第一阶段的详细设计与灵敏度预测，该阶段将搜寻10 GHz至20 GHz（约40 μeV至80 μeV）的质量范围。本次搜寻将采用线阵列等离子体谐振器，以将物理尺寸与谐振频率解耦，突破传统微波腔通常面临的限制，实现接近 KSVZ 耦合强度的宽带灵敏度。
英文摘要
The axion is a well-motivated hypothetical particle capable of resolving both the strong CP problem and the dark matter mystery, with recent post-inflationary cosmological simulations favoring masses above 40 μeV. Plasma haloscopes serve as a promising experimental approach to reach theoretically preferred sensitivities in this mass range. ALPHA, hosted at Yale Wright Laboratory, is an international collaboration developing plasma haloscopes to search for QCD dark matter axions. In this letter we present the detailed design and sensitivity projection for the first phase of the ALPHA experiment, which will search the mass range from 10 GHz to 20 GHz (~40 μeV to 80 μeV). This search will make use of wire-array plasma resonators to decouple the physical size from the resonant frequency, a limitation typically faced by traditional microwave cavities, allowing broadband sensitivity approaching KSVZ coupling strengths.
