Document Type

Conference Paper

Publication Date




Publication Title

Proceedings of the 12th International Particle Accelerator Conference



Conference Name

12th International Particle Accelerator Conference, May 24-28th, 2021, Campinas, Brazil


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) consisting of AMR sensors, fluxgate magnetometers, or Hall probes is 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.


Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.

Original Publication Citation

Parajuli, I. P., Ciovati, G., Delayen, J. R., & Gurevich, A. V. (2021). Evaluation of anisotropic magnetoresistive (AMR) sensors for a magnetic field scanning system for SRF cavities. In L. Lin, J.M. Byrd, R. Neuenschwander, R. Picoreti, & V.R.W. Schaa, (Eds.), Proceedings of the 12th International Particle Accelerator Conference (pp. 2304-2307). Joint Accelerator Conferences Website.


0000-0002-0873-2068 (Parajuli), 0000-0003-0759-8941 (Gurevich)