EDM晶体准冻结自旋晶格的自旋动力学研究
Spin Dynamics Investigation of Quasi-Frozen Spin Lattice for EDM Searches
摘要：
准冻结自旋（QFS）方法是由Yu提出的。Senichev等人在[1]中作为冷冻自旋（FS）方法[2]的替代方法，用于搜索氘电偶极矩（dEDM）。QFS方法简化了晶格的设计。特别是，对当前运行的COSY储存环的微小改变将满足QFS条件。自旋退相干和系统误差从根本上限制了EDM信号的检测和测量。我们的QFS实现方法包括在（1）水平平面测量自旋进动，以校准改变场极性时的磁场，以及（2）垂直平面搜索EDM。为了解决由于元件未对准引起的系统误差，我们在正向和反向方向上跟踪粒子束。我们在COSY INFINITY中建模并跟踪了两个QFS和一个FS格。该模型包括正态分布的随机变量自旋踢磁偶极子和组合的静电和磁场元素。我们使用Wolfram Mathematica程序来部分自动化点阵输入文件生成和跟踪输出数据分析。我们观察到的迹象表明，QFS方法是可行的替代FS方法。[1]Y. Senichev，A.莱拉赫湾洛伦兹河Maier，S. Andrianov，A. Ivanov，S.切克梅涅夫Berz和E. Valetov（代表JEDI协作），在IPAC 2015会议记录中，Richmond，VA（2015）MOPWA044。[2]D. Anastassopoulos等人，AGS提案：在$10^{-29}\:e\cdot\mathrm{cm}$水平上搜索氘核的永久电偶极子矩，BNL报告，布鲁克海文国家实验室，厄普顿，纽约（2008年）。
英文摘要：
The Quasi-Frozen Spin (QFS) method was proposed by Yu. Senichev et al. in [1] as an alternative to the Frozen Spin (FS) method [2] for the search of deuteron electric dipole moment (dEDM). The QFS approach simplifies the design of the lattice. In particular, small changes to the currently operating COSY storage ring will satisfy the QFS condition. Spin decoherence and systematic errors fundamentally limit EDM signal detection and measurement. Our QFS implementation method includes measurement of spin precession in (1) the horizontal plane to calibrate the magnetic field when changing field polarity and (2) the vertical plane to search for EDM. To address systematic errors due to element misalignments, we track particle bunches in forward and reverse directions. We modeled and tracked two QFS and one FS lattice in COSY INFINITY. The models include normally distributed random variate spin kicks in magnetic dipoles and combined electrostatic and magnetic field elements. We used Wolfram Mathematica programs to partially automate lattice input file generation and tracking output data analysis. We observed indications that the QFS method is a viable alternative to the FS method. [1] Y. Senichev, A. Lehrach, B. Lorentz, R. Maier, S. Andrianov, A. Ivanov, S. Chekmenev, M. Berz, and E. Valetov (on behalf of the JEDI Collaboration), in Proceedings of IPAC 2015, Richmond, VA (2015) MOPWA044. [2] D. Anastassopoulos et al., AGS Proposal: Search for a Permanent Electric Dipole Moment of the Deuteron Nucleus at the $10^{-29}\:e\cdot\mathrm{cm}$ Level, BNL Report, Brookhaven National Laboratory, Upton, NY (2008).
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
