Study of the Surface and Performance of Single-Cell Nb Cavities After Vertical EP Using Ninja Cathodes

Chouhan, Vijay; Carbonnier, Pol; Éozénou, Fabien; Furuta, Fumio; Gasser, Yves; Ge, Mingqi; Gruber, Terri; Hayano, Hitoshi; Ida, Yoshiaki; Ishimi, Kiyotaka; Kato, Shigeki; Kaufman, John; Maurice, Luc; Monjushiro, Hideaki; Nii, Keisuke; Saeki, Takayuki; Sawabe, Motoaki; Sears, James; Servouin, Christophe; Yamaguchi, Takanori

doi:10.18429/JACoW-LINAC2016-MOPLR037

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RIS citation export for MOPLR037: Study of the Surface and Performance of Single-Cell Nb Cavities After Vertical EP Using Ninja Cathodes

TY - CONF
AU - Chouhan, V.
AU - Carbonnier, P.
AU - Furuta, F.
AU - Gasser, Y.
AU - Ge, M.
AU - Gruber, T.
AU - Hayano, H.
AU - Ida, Y.I.
AU - Ishimi, K.
AU - Kato, S.
AU - Kaufman, J.J.
AU - Maurice, L.
AU - Monjushiro, H.
AU - Nii, K.N.
AU - Saeki, T.
AU - Sawabe, M.
AU - Sears, J.
AU - Servouin, C.
AU - Yamaguchi, T.Y.
AU - Éozénou, F.
ED - Yamazaki, Yoshishige
ED - Facco, Alberto
ED - McCausey, Amy
ED - Schaa, Volker RW
TI - Study of the Surface and Performance of Single-Cell Nb Cavities After Vertical EP Using Ninja Cathodes
J2 - Proc. of LINAC2016, East Lansing, MI, USA, 25-30 September 2016
C1 - East Lansing, MI, USA
T2 - Linear Accelerator Conference
T3 - 28
LA - english
AB - A 1.3 GHz single-cell niobium (Nb) coupon cavity was vertically electropolished (VEPed) with three different Ninja cathodes which were specially designed for VEP of 1.3 GHz superconducting RF elliptical (ILC/Tesla type) cavities. The cathodes were fabricated to have different surface areas and different distances between cathode surface and the equator. The Ninja cathode prepared with an enhanced cathode surface area was covered with a meshed shield to avoid bubble attack on the surface of the cavity cell. It has been turned out that the anode-cathode distance and the cathode area affect surface morphology of the equator. A smooth equator surface was obtained in the cases in which the cathode surface was geometrically close to the equator or instead the cathode surface area was sufficiently larger. Two 1.3 GHz ILC/Tesla type single-cell cavities VEPed with the Ninja cathodes and using optimized conditions showed good performance in vertical tests.
PB - JACoW
CP - Geneva, Switzerland
SP - 217
EP - 219
KW - cathode
KW - cavity
KW - experiment
KW - polarization
KW - niobium
DA - 2017/05
PY - 2017
SN - 978-3-95450-169-4
DO - 10.18429/JACoW-LINAC2016-MOPLR037
UR - http://jacow.org/linac2016/papers/moplr037.pdf
ER -