论文标题
使用18吨高温超导磁铁的轴支吊带板
Axion Haloscope Using an 18 T High Temperature Superconducting Magnet
论文作者
论文摘要
我们报告了使用高温超导（HTS）磁铁和Josephson参数转换器（JPC）的创新技术的Axion暗物质搜索实验的详细信息。为此实验开发了18吨HTS电磁磁铁。 JPC用作达到接近量子限制的低噪声条件的第一阶段放大器。使用18 t轴卤素器进行了第一个暗物质轴搜索。扫描频率范围从4.7789 GHz到4.8094 GHz（30.5 MHz范围）。未观察到与银河暗物质轴相一致的显着信号。我们的结果设定了在19.764的轴质量范围内，将轴 - 光子-Photon耦合（$ G_ {Aγγ} $）设定为19.890 $μ$ $ EV。使用贝叶斯方法，$ g_ {aγγ} $的上限设置为0.98 $ \ times | g_ {aγγ}^{\ text {ksvz}} | $（1.11 $ \ times | g_ g_ g_ | g_ {aγγ}^{aγγ}^{\ text {\ ksvz {ksvz} { $μ$ ev（19.863至19.890 $μ$ eV），在1.76 $ \ times | g_ {aγγ}^{\ text {ksvz}} | $中，分别为19.772至19.863 $ $ EV，分别为90 \％的置信度。我们报告了18 T轴卤体实验的设计，构造，操作和数据分析。
We report details on the axion dark matter search experiment that uses the innovative technologies of a High-Temperature Superconducting (HTS) magnet and a Josephson Parametric Converter (JPC). An 18 T HTS solenoid magnet is developed for this experiment. The JPC is used as the first stage amplifier to achieve a near quantum-limited low-noise condition. The first dark matter axion search was performed with the 18 T axion haloscope. The scan frequency range is from 4.7789 GHz to 4.8094 GHz (30.5 MHz range). No significant signal consistent with Galactic dark matter axion is observed. Our results set the best limit of the axion-photon-photon coupling ($g_{aγγ}$) in the axion mass range of 19.764 to 19.890 $μ$eV. Using the Bayesian method, the upper bounds of $g_{aγγ}$ are set at 0.98$\times|g_{aγγ}^{\text{KSVZ}}|$ (1.11$\times|g_{aγγ}^{\text{KSVZ}}|$) in the mass ranges of 19.764 to 19.771 $μ$eV (19.863 to 19.890 $μ$eV), and at 1.76 $\times|g_{aγγ}^{\text{KSVZ}}|$ in the mass ranges of 19.772 to 19.863 $μ$eV with 90\% confidence level, respectively. We report design, construction, operation, and data analysis of the 18 T axion haloscope experiment.
