Cryomodule Testing of Nitrogen-Doped Cavities

Gonnella, Daniel; Clasby, Brian; Eichhorn, Ralf; Elmore, Brendan; Furuta, Fumio; Ge, Mingqi; Grassellino, Anna; Grimm, Chuck; Hall, Daniel; He, Yun; Hoffstaetter, Georg; Holzbauer, Jeremiah; Kaufman, John; Koufalis, Peter; Liepe, Matthias; Maniscalco, James; Melnychuk, Oleksandr; O'Connell, Tim; Palczewski, Ari; Pischalnikov, Yuriy; Quigley, Peter; Reece, Charles; Romanenko, Alexander; Sabol, Daniel; Schappert, Warren; Sergatskov, Dmitri; Smith, Eric; Veshcherevich, Vadim

doi:10.18429/JACoW-SRF2015-MOPB041

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RIS citation export for MOPB041: Cryomodule Testing of Nitrogen-Doped Cavities

TY - CPAPER
AU - Gonnella, D.
AU - Clasby, B.
AU - Eichhorn, R.G.
AU - Elmore, B.
AU - Furuta, F.
AU - Ge, G.M.
AU - Grassellino, A.
AU - Grimm, C.J.
AU - Hall, D.L.
AU - He, Y.
AU - Hoffstaetter, G.H.
AU - Holzbauer, J.P.
AU - Kaufman, J.J.
AU - Koufalis, P.N.
AU - Liepe, M.
AU - Maniscalco, J.T.
AU - Melnychuk, O.S.
AU - O'Connell, T.I.
AU - Palczewski, A.D.
AU - Pischalnikov, Y.M.
AU - Quigley, P.
AU - Reece, C.E.
AU - Romanenko, A.
AU - Sabol, D.M.
AU - Schappert, W.
AU - Sergatskov, D.A.
AU - Smith, E.N.
AU - Veshcherevich, V.
TI - Cryomodule Testing of Nitrogen-Doped Cavities
J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015
AB - The Linac Coherent Light Source-II (LCLS-II) is a new FEL x-ray source that is planned to be constructed in the existing SLAC tunnel. In order to meet the required high Q0 specification of 2.7x10¹⁰ at 2 K and 16 MV/m, nitrogen-doping has been proposed as a preparation method for the SRF cavities in the linac. In order to test the feasibility of these goals, four nitrogen-doped cavities have been tested at Cornell in the Horizontal Test Cryomodule (HTC) in five separate tests. The first three tests consisted of cavities assembled in the HTC with high Q input coupler. The fourth test used the same cavity as the third but with the prototype high power LCLS-II coupler installed. Finally, the fifth test used a high power LCLS-II coupler, cavity tuner, and HOM antennas. Here we report on the results from these tests along with a systematic analysis of change in performance due to the various steps in preparing and assembling LCLS-II cavities for cryomodule operation. These results represent one of the final steps to demonstrate readiness for full prototype cryomodule assembly for LCLS-II.
PB - JACoW
CY - Geneva, Switzerland
SP - 182
EP - 186
KW - cavity
KW - cryomodule
KW - HOM
KW - SRF
KW - linac
DA - 2015/12
PY - 2015
SN - 978-3-95450-178-6
DO - 10.18429/JACoW-SRF2015-MOPB041
UR - http://srf2015.vrws.de/papers/mopb041.pdf
ER -