共振驱动的类轴子粒子探测实验设计与优化  

Experimental design and optimization of resonant search for exotic axion-like particles

作　　者：马积喜 兰阳 闫海洋 MA JiXi;LAN Yang;YAN HaiYang(Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《中国科学：物理学、力学、天文学》2022年第11期74-84,共11页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：中国科学技术部国家重点研发计划(编号:2020YFA0406001,2020YFA0406002)资助项目。

摘　　要：为了进一步提高类轴子粒子传播的与自旋速度相关的新相互作用的实验灵敏度,本文研究了极化~3He作为探针的共振驱动方法来探测其与非极化物质间的新相互作用.首次将核磁共振Bloch方程中驱动磁场看作微扰,使用微扰法求解出Bloch方程的解析解,并计算出共振时有效磁场的放大倍数.其次分析了玻璃气室参数对有效磁场放大倍数的影响,优化设计后半径为1-2 mm的特种玻璃气室可使有效磁场放大倍数达到10~7.依托我们的特种玻璃气室制备设施和工艺,可使现有的实验探测灵敏度提高5个数量级.We studied a resonance-based method using polarized ~3He to probe its interaction with nonpolarized matter and improve the experimental sensitivity of the spin-velocity-dependent interaction mediated by axion-like particles. For the first time,the analytical solution of the Bloch equation was obtained by the perturbation method. In the Bloch equation, the driving term of the efective magnetic field is regarded as a perturbation, and the amplification of the efective magnetic field in resonance is calculated. When the efect of glass cell parameters on the magnetic field amplification is analyzed, optimized special glass cells of radius 1-2 mm can achieve a factor of 10~6 in magnetic field amplification. Relying on our onsite facility and techniques for glass cells, the sensitivity of the previous experiment can be improved by five orders of magnitude.

关 键 词：类轴子粒子 自旋相关新相互作用 极化~3He 核磁共振 

分 类 号：O469[理学—凝聚态物理]