沿场方向运动对几何相位诱导的虚假电偶极矩信号的影响
Impact of motion along the field direction on geometric-phase-induced false electric dipole moment signals
摘要：
由于磁场梯度和粒子在电场中的运动之间的干涉，几何相位引起的假电偶极矩（EDM）信号在文献中得到了广泛的研究，特别是对于利用存储的超冷中子和共磁强计原子的中子EDM实验。以前的研究考虑了粒子在垂直于外加电场和磁场方向的横向平面内的运动。我们表明，通过蒙特卡罗研究，沿场方向的运动可以影响这个假EDM信号的大小，如果壁表面粗糙，这样的壁碰撞可以建模为扩散，结果取决于存储单元的尺寸沿场方向的大小。
英文摘要：
Geometric-phase-induced false electric dipole moment (EDM) signals, resulting from interference between magnetic field gradients and particle motion in electric fields, have been studied extensively in the literature, especially for neutron EDM experiments utilizing stored ultracold neutrons and co-magnetometer atoms. Previous studies have considered particle motion in the transverse plane perpendicular to the direction of the applied electric and magnetic fields. We show, via Monte Carlo studies, that motion along the field direction can impact the magnitude of this false EDM signal if the wall surfaces are rough such that the wall collisions can be modeled as diffuse, with the results dependent on the size of the storage cell's dimension along the field direction.
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