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RIS citation export for THPO009: Evaluation of 60pC Beam Performance at cERL Injector for ERL Based EUV-FEL

AU  - Hotei, T.
AU  - Kato, R.
AU  - Miyajima, T.
ED  - Schaa, Volker RW
ED  - Pei, Guoxi
ED  - Chin, Yong Ho
ED  - Fu, Shinian
ED  - Zhao, Ning
TI  - Evaluation of 60pC Beam Performance at cERL Injector for ERL Based EUV-FEL
J2  - Proc. of LINAC2018, Beijing, China, 16-21 September 2018
CY  - Beijing, China
T2  - Linear Accelerator Conference
T3  - 29
LA  - english
AB  - In order to compensate for the emittance which is increased by space charge in the low energy region, it is important to transport the beam as designed. Until now, we did not consider couplers in injector superdonducting cavities in optics design. But in this study, to improve optics matching and emittance compensation conditions for space charge dominated beam in cERL at KEK, we introduced a new 3D cavity model. We first investigated the influence of the couplers on electromagnetic field distribution. As a result, it was found that an asymmetric focusing force is generated by the influence of the couplers. It also became clear that the influence of the coupler kick on the optics significantly devastated the emittance compensation condition from the calculating including space charge. Furthermore, it was found that by optimizing the optics in consideration of the coupler kick, it is possible to improve the beam control accuracy and reduce the emittance in beam commissioning.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 699
EP  - 701
KW  - emittance
KW  - cavity
KW  - optics
KW  - electromagnetic-fields
KW  - space-charge
DA  - 2019/01
PY  - 2019
SN  - 2226-0366
SN  - 978-3-95450-194-6
DO  - DOI: 10.18429/JACoW-LINAC2018-THPO009
UR  - http://jacow.org/linac2018/papers/thpo009.pdf
ER  -