论文标题
搜索具有高Q介电腔的银河轴
Search for galactic axions with a high-Q dielectric cavity
论文作者
论文摘要
Quax-$aγ$实验的卤素，由浸入8 T磁铁中的高Q谐振腔组成，并冷却至$ \ sim 4.5 $ 〜k，用于搜索带有质量$ M_A \ Simeq42.8〜μm的质量$ M_A \ simeq42.8〜μ \ text {ev} $。在A OFHC Cu腔中插入空心介电圆柱体的腔设计使我们能够在磁场存在的测量过程中维持负载的质量因子Q $ \ sim 300000 $。通过空腔调谐机制，可以调节该区域中卤素的共振频率$ 10.35337-10.35345 $ 〜GHz，从而在不同的共振频率下获取不同的数据集。获取每个数据集约50分钟，将它们组合在一起并纠正轴信号估计效率，我们设定了轴突 - 光子耦合$ g_ {aγγ} <0.731 \ 0.731 \ times10^{ - 13} $ gev $^$^{ - 1} $，其置信度设置为$ 90 $ $ $ $ $ $ $ $。
A haloscope of the QUAX--$aγ$ experiment, composed of an high-Q resonant cavity immersed in a 8 T magnet and cooled to $\sim 4.5$~K is operated to search for galactic axion with mass $m_a\simeq42.8~μ\text{eV}$. The design of the cavity with hollow dielectric cylinders concentrically inserted in a OFHC Cu cavity, allowed us to maintain a loaded quality-factor Q $\sim 300000$ during the measurements in presence of magnetic field. Through the cavity tuning mechanism it was possible to modulate the resonance frequency of the haloscope in the region $10.35337-10.35345$~GHz and thus acquire different dataset at different resonance frequencies. Acquiring each dataset for about 50 minutes, combining them and correcting for the axion's signal estimation-efficiency we set a limit on the axion-photon coupling $g_{aγγ}< 0.731\times10^{-13}$ GeV$^{-1}$ with the confidence level set at $90\%$.
