Author: Parajuli, I.P.
Paper Title Page
TUPAB344 Evaluation of Anisotropic Magnetoresistive (AMR) Sensors for a Magnetic Field Scanning System for SRF Cavities 2304
 
  • I.P. Parajuli, G. Ciovati, J.R. Delayen, A.V. Gurevich
    ODU, Norfolk, Virginia, USA
  • G. Ciovati, J.R. Delayen
    JLab, Newport News, Virginia, USA
  
  Funding: Work supported by NSF Grant 100614-010. G. C. is supported by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
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. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB344  
About • paper received ※ 19 May 2021       paper accepted ※ 09 June 2021       issue date ※ 29 August 2021  
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