A method for controlling the magnetic field near a superconducting boundary in the ARIADNE axion experiment
A method for controlling the magnetic field near a superconducting boundary in the ARIADNE axion experiment
复制标题
ARIADNE轴子实验中超导边界附近磁场的控制方法
DOI：
10.1088/2058-9565/abf1cc
复制
发表时间：
2022
影响因子：
6.7
通讯作者：
Matlashov, A.
中科院分区：
文献类型：
--
作者：
Fosbinder-Elkins, H.;Kim, Y.;Dargert, J.;Harkness, M.;Geraci, A. A.;Levenson-Falk, E.;Mumford, S.;Fang, A.;Kapitulnik, A.;Matlashov, A.
QCD 轴子是一种自 20 世纪 70 年代以来就被假设存在的粒子，用于解释粒子物理学中的强 CP 问题。它还可以解释宇宙中所有观察到的暗物质。轴子共振相互作用检测实验（ARIADNE）旨在通过感测 QCD 轴子与自旋耦合产生的虚拟“磁场”来检测 QCD 轴子。激光偏振 3 He 核自旋样本和非偏振源质量链轮之间可能发生短程轴子介导的相互作用。实验必须对低于 10− 19 T 水平的磁场敏感才能达到其设计灵敏度，因此需要严格控制实验的磁环境。我们描述了一种控制该环境的三个方面的方法，否则会限制实验灵敏度。首先，描述了超导磁屏蔽系统，用于屏蔽 10 8 级样品体积中的普通磁噪声，这应足以减少链轮形源质量中约翰逊噪声的贡献，预计为 10− 12 T
The QCD axion is a particle postulated to exist since the 1970s to explain the strong-CP problem in particle physics. It could also account for all of the observed dark matter in the Universe. The axion resonant interaction detection experiment (ARIADNE) intends to detect the QCD axion by sensing the fictitious' magnetic field'created by its coupling to spin. Short-range axion-mediated interactions can occur between a sample of laser-polarized 3 He nuclear spins and an unpolarized source-mass sprocket. The experiment must be sensitive to magnetic fields below the 10− 19 T level to achieve its design sensitivity, necessitating tight control of the experiment's magnetic environment. We describe a method for controlling three aspects of that environment which would otherwise limit the experimental sensitivity. Firstly, a system of superconducting magnetic shielding is described to screen ordinary magnetic noise from the sample volume at the 10 8 level, which should be sufficient to reduce the contribution of Johnson noise in the sprocket-shaped source mass, expected to be at the 10− 12 T