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TY - CONF
AU - Huang, T.M.
AU - Dai, J.P.
AU - Ge, R.
AU - Li, S.P.
AU - Li, Z.Q.
AU - Lin, H.Y.
AU - Ma, Q.
AU - Pan, W.M.
AU - Sha, P.
AU - Sun, Y.
AU - Wang, G.W.
ED - Schaa, Volker RW
ED - Arduini, Gianluigi
ED - Pranke, Juliana
ED - Seidel, Mike
ED - Lindroos, Mats
TI - The Window Replacement and Q Recovery of BEPCII Storage Ring SCC
J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14–19 May, 2017
C1 - Copenhagen, Denmark
T2 - International Particle Accelerator Conference
T3 - 8
LA - english
AB - The storage ring RF system for the upgrade of the Beijing Electron Positron Collider (BEPCII) adopted two 500 MHz superconducting cavities: west for the positron ring (BPR); east for the electron ring (BER). The excessive heating of the west window was observed in Nov.2013, and not cured thoroughly*. After two years operation, the window cracked suddenly on Nov.18th, 2015. The replacement of the window was subsequently implemented in tunnel. However, the quality factor (Q) of the cavity decayed a lot after the window replacement. 90 degrees Celsius N2 gas baking of the outer surface of the cavity was carried out in situ and the Q recovered in a short time. This paper will present the process of the window replacement and the cavity Q recovery in detail.
PB - JACoW
CP - Geneva, Switzerland
SP - 1046
EP - 1048
KW - cavity
KW - vacuum
KW - operation
KW - positron
KW - radiation
DA - 2017/05
PY - 2017
SN - 978-3-95450-182-3
DO - 10.18429/JACoW-IPAC2017-MOPVA078
UR - http://jacow.org/ipac2017/papers/mopva078.pdf
ER -