Evaluation of Anisotropic Magnetoresistive (AMR) Sensors for a Magnetic Field Scanning System for SRF Cavities
Evaluation of Anisotropic Magnetoresistive (AMR) Sensors for a Magnetic Field Scanning System for SRF Cavities
复制标题
用于 SRF 腔磁场扫描系统的各向异性磁阻 (AMR) 传感器的评估
DOI：
10.18429/jacow-ipac2021-tupab344
复制
发表时间：
2021
期刊：
影响因子：
64.8
通讯作者：
A. Gurevich
中科院分区：
文献类型：
--
作者：
I. Parajuli;G. Ciovati;J. Delayen;A. Gurevich
One of the significant causes of residual losses in superconducting radio-frequency (SRF) cavities is trapped magnetic flux. The flux trapping mechanism depends on many factors that include cool-down conditions, surface preparation techniques, and ambient magnetic field orientation. Suitable diagnostic tools are not yet available to quantitatively correlate such factors' effect on the flux trapping mechanism. A magnetic field scanning system (MFSS) utilizing anisotropic magnetoresitive sensors, fluxgate magnetometers, or Hall probes was recently commissioned to scan the local magnetic field of trapped vortices around 1.3 GHz single-cell SRF cavities. In this contribution, we will present results from sensitivity calibration and the first tests of AMR sensors in the MFSS.
