“ N2EDM MSR” - 一个非常大的磁性屏蔽室，具有出色的性能，可用于基本物理测量

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“ N2EDM MSR” - 一个非常大的磁性屏蔽室，具有出色的性能，可用于基本物理测量

The `n2EDM MSR' -- a very large magnetically shielded room with an exceptional performance for fundamental physics measurements

论文作者

Ayres, N. J., Ban, G., Bison, G., Bodek, K., Bondar, V., Bouillaud, T., Clement, B., Chanel, E., Chiu, P. -J., Crawford, C. B., Daum, M., Doorenbos, C. B., Emmenegger, S., Fratangelo, A., Fertl, M., Griffith, W. C., Grujic, Z. D., Harris, P. G., Kirch, K., Krempel, J., Lauss, B., Lefort, T., Naviliat-Cuncic, O., Pais, D., Piegsa, F. M., Pignol, G., Rauscher, G., Rebreyend, D., Rienäcker, I., Ries, D., Roccia, S., Rozpedzik, D., Saenz-Arevalo, W., Schmidt-Wellenburg, P., Schnabel, A., Severijns, N., Shen, B., Staab, M., Svirina, K., Dinani, R. Tavakoli, Thorne, J., Yazdandoost, N., Zejma, J., Zsigmond, G.

论文摘要

我们为Paul Scherrer Institute的N2EDM实验提供了磁性屏蔽室（MSR），该实验具有内部立方体积，每一侧的长度为2.92m，因此提供了25m3的可访问空间。 MSR的直径高达220mm的87个开口，可在内部操作实验设备，以及用于敏感信号处理的层之间的中间空间。表征测量结果显示，在100pt以下的中央1M3中有一个不连续的磁场，并且在整个内部体积中的600pt低于600pt的磁场，最大为4 \ cm，到墙壁。在0.01 \时，用正弦2MUT 2MUT峰峰信号测量的准静态屏蔽因子在所有三个空间方向上约为100,000，并且以频率快速上升至1Hz以上的10^8。

We present the magnetically shielded room (MSR) for the n2EDM experiment at the Paul Scherrer Institute which features an interior cubic volume with each side of length 2.92m, thus providing an accessible space of 25m3. The MSR has 87 openings up to 220mm diameter to operate the experimental apparatus inside, and an intermediate space between the layers for sensitive signal processing electronics. The characterization measurements show a remanent magnetic field in the central 1m3 below 100pT, and a field below 600pT in the entire inner volume, up to 4\,cm to the walls. The quasi-static shielding factor at 0.01\,Hz measured with a sinusoidal 2muT peak-to-peak signal is about 100,000 in all three spatial directions and rises fast with frequency to reach 10^8 above 1Hz.

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