DALI 卤素子望远镜：耦合到半开放法布里-珀罗谐振器的磁化相控阵
The DALI Haloscope: A Magnetized Phased Array Coupled to a Semi-Open Fabry--Pérot Resonator
- Instituto de Astrofísica de Canarias（加那利天体物理学研究所）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
DALI 将磁化相控阵与半开放法布里-珀罗谐振器耦合，通过介电增强和谐振存储两种机制提升轴子探测灵敏度，为高频轴子搜索提供灵活方案。
AI中文摘要：
DALI 是一种轴子卤素子望远镜，由磁化相控阵组成，该相控阵以导电镜为背衬，并在近场中与半开放法布里-珀罗谐振器耦合。施加的静磁场使介电界面和导电镜均对轴子诱导的电磁转换敏感。每个界面充当辐射表面，产生的场被投影到谐振器收集并传送到接收器的模式上。我们根据磁化镜可用的功率、介电界面的相干贡献、横向模式重叠、负载品质因数和接收器耦合系数来推导检测到的功率。该公式区分了两种不同的增强机制。介电界面发射可以相干相加，产生介电增强，而半开放法布里-珀罗谐振器通过谐振存储耦合电磁场提供增强。这些贡献对介电厚度、间距和谐振模式的依赖不同，因此应独立评估。同一装置可以在相干增强介电卤素子望远镜和镜源谐振增强法布里-珀罗卤素子望远镜的极限之间运行。这种组合架构为在传统封闭微波腔在转换体积方面日益受限的频率下进行谐振轴子搜索提供了一种灵活的方法。
英文摘要：
DALI is an axion haloscope consisting of a magnetized phased array backed by a conducting mirror and coupled in the near field to a semi-open Fabry--Pérot resonator. The applied static magnetic field makes both the dielectric interfaces and the conducting mirror sensitive to axion-induced electromagnetic conversion. Each interface acts as a radiating surface, and the resulting fields are projected onto the mode collected by the resonator and delivered to the receiver. We derive the detected power in terms of the power available from the magnetized mirror, the coherent contribution of the dielectric interfaces, the transverse mode overlap, the loaded quality factor, and the receiver-coupling coefficient. This formulation separates two distinct enhancement mechanisms. The dielectric-interface emissions may add coherently, producing a dielectric boost, while the semi-open Fabry--Pérot resonator provides enhancement through resonant storage of the coupled electromagnetic field. These contributions depend differently on the dielectric thicknesses, spacings, and resonant mode, and should therefore be evaluated independently. The same assembly can operate between the limits of a coherently boosted dielectric haloscope and a mirror-sourced, resonantly enhanced Fabry--Pérot haloscope. This combined architecture offers a flexible approach to resonant axion searches at frequencies for which conventional closed microwave cavities become increasingly limited in conversion volume.
