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TY - CONF
AU - Dhakal, P.
AU - Ciovati, G.
AU - Myneni, G.R.
ED - Michel, Peter
ED - Arnold, André
ED - Schaa, Volker RW
TI - Evaluation of High Performance Large Grain Medium Purity SRF Cavity From KEK
J2 - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019
CY - Dresden, Germany
T2 - International Conference on RF Superconductivity
T3 - 19
LA - english
AB - We presented the RF measurement on a 1.3 GHz single cell cavity fabricated at KEK using large grain ingot niobium with RRR=10⁷. The cavity reached to 35 MV/m with Q₀ = 2.0×10^{z}EhNZeHn at 2.0 K, record performance on the cavity made from medium purity ingot niobium. The cavity was cool down with different temperature gradient along the cavity axis in order to understand the flux expulsion mechanism when the cavity does through the superconducting transition and effect of trap residual magnetic field on the residual resistance. The measurement showed the excellent flux expulsion with the flux trapping sensitivity of 0.29 nΩ/mG for electro polished surface and 0.44 nΩ/mG for cavity followed by low temperature baking at 120°C for 12 hours.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 415
EP - 418
KW - cavity
KW - niobium
KW - SRF
KW - experiment
KW - cryogenics
DA - 2019/08
PY - 2019
SN - ""
SN - 978-3-95450-211-0
DO - doi:10.18429/JACoW-SRF2019-TUP012
UR - http://jacow.org/srf2019/papers/tup012.pdf
ER -