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RIS citation export for WEPRB094: Measurements of the Electrical Axes of the CeC PoP RF Cavities

AU  - Petrushina, I.
AU  - Jing, Y.C.
AU  - Litvinenko, V.
AU  - Ma, J.
AU  - Pinayev, I.
AU  - Shih, K.
AU  - Wang, G.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Measurements of the Electrical Axes of the CeC PoP RF Cavities
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - It is common knowledge that every mode in an SRF cavity has a so-called electrical axis, and only in an ideal cavity would this axis align exactly with the geometrical axis of the device. The misalignment of the electrical axis creates an additional undesirable transverse kick to the beam, which has to be corrected to achieve the designed beam parameters. In this paper we present the two methods which have been used in order to determine the electrical axes in the RF cavities of the Coherent electron Cooling (CeC) Proof of Principle (PoP) accelerator. The electron accelerator for the CeC PoP consists of the three main RF components: the 113 MHz SRF gun, the two normal-conducting 500 MHz bunching cavities, and the 704 MHz SRF 5-cell elliptical cavity. We discuss, in detail, the specifics of the measurement for each cavity and provide the corresponding results. In addition, we describe the influence of the field asymmetry in the 500 MHz bunchers on the beam dynamics, which was observed experimentally and confirmed by simulations.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3031
EP  - 3034
KW  - cavity
KW  - cathode
KW  - gun
KW  - electron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPRB094
UR  - http://jacow.org/ipac2019/papers/weprb094.pdf
ER  -