发表机构
Thomas Jefferson National Accelerator Facility; University of Virginia; The Hebrew University of Jerusalem（托马斯·杰斐逊国家加速器设施; 弗吉尼亚大学; 耶路撒冷希伯来大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出一种基于旋转霍尔探头的新型磁罗盘，无需校准且抗电子学漂移，通过旋转探头产生交变信号并使其消失来确定磁场方向，在杰斐逊实验室实验中达到约1毫弧度精度，并验证了旋转磁场集中器方案可分辨70微弧度方向。
AI 中文摘要
在许多物理和空间实验中，磁场的方向必须精确到毫弧度或更高精度。我们开发了一种基于旋转的新型磁罗盘，其中旋转的霍尔探头（HP）产生一个与磁场垂直于旋转轴的分量成正比的交变信号。将旋转轴对准使该信号消失的方向，即可得到磁场方向。该装置无需校准，且对电子学漂移不敏感。在杰斐逊实验室最近的一项实验中，我们构建并使用了旋转霍尔探头罗盘，它确定了极化³He靶的25高斯保持场的方向，精度约为1毫弧度；旋转轴的方向通过激光和附着在转子上的平面镜传递到实验室坐标系。旋转方法的第二种实现方式——带有固定霍尔探头的旋转磁场集中器（SFC）——也已构建。在10秒平均时间内，SFC罗盘可分辨18微高斯（μG）的横向场，对应于0.25高斯（接近地球磁场）场中70微弧度（μrad）的方向分辨率。
英文摘要
In many physics and space experiments the direction of a magnetic field must be known to one milliradian or better. We have developed a new type of magnetic compass, based on rotation, in which a spinning Hall probe (HP) produces an alternating signal proportional to the component of the magnetic field transverse to the axis of rotation. Aligning the rotation axis so that this signal vanishes gives the direction of the field. The device requires no calibration and is insensitive to electronics drift. A spinning-HP compass was built and used in a recent experiment at Jefferson Lab, where it determined the direction of the 25~G holding field of a polarized $^3$He target to about 1~mrad; the direction of the rotation axis was transferred to the laboratory frame with a laser and a flat mirror attached to the rotor. A second implementation of the rotation approach, a spinning field concentrator (SFC) with a stationary Hall probe, was also built. With 10 seconds of averaging the SFC compass resolves a transverse field of 18~$μ$G, corresponding to a directional resolution of 70~$μ$rad in a field of 0.25 G, close to the Earth's field.
Comments5 pages, 12 figures
