TY - JOUR
T1 - Analysis on effects of transverse electric field in an injector cavity of compact-ERL at KEK
AU - Hwang, Ji Gwang
AU - Kim, Eun San
AU - Miyajima, Tsukasa
AU - Honda, Yosuke
AU - Harada, Kentaro
AU - Shimada, Miho
AU - Takai, Ryota
AU - Kume, Tatsuya
AU - Nagahashi, Shinya
AU - Obina, Takashi
AU - Nakamura, Norio
AU - Sakanaka, Shogo
AU - Hajima, Ryoichi
AU - Nagai, Ryoji
AU - Nishimori, Nobuyuki
AU - Yamamoto, Masahiro
AU - Uchiyama, Takashi
AU - Kako, Eiji
AU - Michizono, Shinichiro
AU - Miura, Takako
N1 - Funding Information:
The authors wish to thank collaborators of compact-ERL for their efforts to construct the machine. In addition, this work was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MEST) (grant No. NRF-2010-0005128 ).
PY - 2014/7/21
Y1 - 2014/7/21
N2 - For a future synchrotron light source based on a linac, e.g. an X-ray free electron laser and an energy recovery linac (ERL), an injector is a key component to generate a high brightness electron beam. For the acceleration and transportation of the electron beam in the injector, the adjustment of beam orbit inside the cavity is important to avoid the deterioration of the beam quality due to the transverse electric field of it, which causes the transverse emittance growth. To adjust the beam orbit, an investigation of the electromagnetic center of the cavity is required in the beam operation. This paper shows a new method for measuring the electromagnetic center of the cavity, and describes an analytical model of emittance growth due to a combination of transverse electric field and orbit offset. The validation of the method was confirmed by the emittance measurement in the compact ERL (cERL) injector at KEK.
AB - For a future synchrotron light source based on a linac, e.g. an X-ray free electron laser and an energy recovery linac (ERL), an injector is a key component to generate a high brightness electron beam. For the acceleration and transportation of the electron beam in the injector, the adjustment of beam orbit inside the cavity is important to avoid the deterioration of the beam quality due to the transverse electric field of it, which causes the transverse emittance growth. To adjust the beam orbit, an investigation of the electromagnetic center of the cavity is required in the beam operation. This paper shows a new method for measuring the electromagnetic center of the cavity, and describes an analytical model of emittance growth due to a combination of transverse electric field and orbit offset. The validation of the method was confirmed by the emittance measurement in the compact ERL (cERL) injector at KEK.
KW - Beam dynamics in a superconducting cavity
KW - Emittance growth compensation
KW - Energy recovery linac
KW - High performance injector system
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U2 - 10.1016/j.nima.2014.03.045
DO - 10.1016/j.nima.2014.03.045
M3 - Article
AN - SCOPUS:84899578252
SN - 0168-9002
VL - 753
SP - 97
EP - 104
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ER -