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RIS citation export for WEPMB016: Vertical Test Results of Nitrogen Doped SRF Cavities at KEK

AU - Umemori, K.
AU - Hara, H.
AU - Inoue, H.
AU - Kako, E.
AU - Konomi, T.
AU - Kubo, T.
AU - Sakai, H.
AU - Sennyu, K.
AU - Shimizu, H.
AU - Yamanaka, M.
AU - Yanagisawa, T.
ED - Petit-Jean-Genaz, Christine
ED - Kim, Dong Eon
ED - Kim, Kyung Sook
ED - Ko, In Soo
ED - Schaa, Volker RW
TI - Vertical Test Results of Nitrogen Doped SRF Cavities at KEK
J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016
C1 - Busan, Korea
T2 - International Particle Accelerator Conference
T3 - 7
LA - english
AB - Recently Nitrogen doping(N-doping) technique was proposed and drastic improvements of Q-values were reported. Since high-Q operation of SRF cavities are very attractive for CW machine, we started investigation on performance of Nitrogen doped SRF cavities. Nitrogen doping systems were prepared on two vacuum furnaces, which have been used for annealing of SRF cavities. Two fine grain single cell cavities have been used for the study. After 800 degree, 3 hours annealing, N-doping were carried out under several Pa of Nitrogen pressure and followed by post annealing. Three kind of different conditions, pressure and duration time, were attempted. After applying EP-2, cavity performances were evaluated by vertical tests. Against our expectations, we observed lower Q-values, at every measurements, than those measured without N-doping. In this presentation, we describe details about N-doping system and parameters and results obtained by vertical tests. Some discussions are also given against our results.
CP - Geneva, Switzerland
SP - 2154
EP - 2157
KW - cavity
KW - vacuum
KW - monitoring
KW - operation
DA - 2016/06
PY - 2016
SN - 978-3-95450-147-2
DO - 10.18429/JACoW-IPAC2016-WEPMB016
UR - http://jacow.org/ipac2016/papers/wepmb016.pdf
ER -