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RIS citation export for WEPMR009: Magnetic Flux Expulsion Studies in Niobium SRF Cavities

AU - Posen, S.
AU - Checchin, M.
AU - Crawford, A.C.
AU - Grassellino, A.
AU - Martinello, M.
AU - Melnychuk, O.S.
AU - Romanenko, A.
AU - Sergatskov, D.A.
AU - Trenikhina, Y.
ED - Petit-Jean-Genaz, Christine
ED - Kim, Dong Eon
ED - Kim, Kyung Sook
ED - Ko, In Soo
ED - Schaa, Volker RW
TI - Magnetic Flux Expulsion Studies in Niobium SRF Cavities
J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016
C1 - Busan, Korea
T2 - International Particle Accelerator Conference
T3 - 7
LA - english
AB - With the recent discovery of nitrogen doping treatment for SRF cavities, ultra-high quality factors at medium accelerating fields are regularly achieved in vertical RF tests. To preserve these quality factors into the cryomodule, it is important to consider background magnetic fields, which can become trapped in the surface of the cavity during cooldown and cause Q₀ degradation. Building on the recent discovery that spatial thermal gradients during cooldown can significantly improve expulsion of magnetic flux, a detailed study was performed of flux expulsion on two cavities with different furnace treatments that are cooled in magnetic fields amplitudes representative of what is expected in a realistic cryomodule. In this contribution, we summarize these cavity results, in order to improve understanding of the impact of flux expulsion on cavity performance.
CP - Geneva, Switzerland
SP - 2277
EP - 2279
KW - cavity
KW - niobium
KW - cryomodule
KW - background
KW - survey
DA - 2016/06
PY - 2016
SN - 978-3-95450-147-2
DO - 10.18429/JACoW-IPAC2016-WEPMR009
UR - http://jacow.org/ipac2016/papers/wepmr009.pdf
ER -