A New Method for Detecting Axion With Cylindrical Superconductor
A New Method for Detecting Axion With Cylindrical Superconductor
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圆柱超导体检测轴子的新方法
DOI：
10.1016/j.physletb.2020.135861
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
岩崎愛一
中科院分区：
文献类型：
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作者：
H. Itoyama;Takeshi Oota;Katusya Yano;Tsunehide Kuroki;湯本純，三角樹弘;岩崎愛一
我们提出了一种在轴子-光子转换中搜索暗物质轴子的方法。我们考虑强磁场下的圆柱形超导体。暗物质轴子产生振荡电场，在超导体表面感应振荡超导电流。电流产生偶极子辐射，频率为 m a/2 π，由轴子质量 m a 给出。我们发现，在圆柱形超导体半径为 1 cm、长度为 10 cm 的情况下，在磁场~ 3 T 下，电流产生的辐射通量约为 10− 18 W 量级。大量辐射通量的产生是因为超导体中存在具有大数密度（~ 10 22/cm 3 ）的库珀对。由于探测灵敏度高，我们可以用现有的射电望远镜同时搜索宽带宽的射电频率。
We propose a method for searching dark matter axion in axion-photon conversion. We consider a superconductor of cylindrical shape under strong magnetic field. The dark matter axion generates oscillating electric field which induces oscillating superconducting current in the surface of the superconductor. The current gives rise to dipole radiation with the frequency m a/2 π given by axion mass m a. We show that the radiation flux generated by the current is of the order of 10− 18 W under magnetic field∼ 3 T in the case of radius 1 cm and length 10 cm of the cylindrical superconductor. The large amount of the radiation flux arises because Cooper pairs with large number density (∼ 10 22/cm 3) is present in the superconductor. With the high detection sensitivity, we can simultaneously search wide bandwidth of the radio frequency with existing radio telescope.