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RIS citation export for WEPRB081: Design Study on Higher Harmonic Cavity for ALS-U

AU  - Feng, H.Q.
AU  - Baptiste, K.M.
AU  - De Santis, S.
AU  - Huang, W.-H.
AU  - Li, D.
AU  - Liu, Z.N.
AU  - Luo, T.H.
AU  - Tang, C.-X.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Design Study on Higher Harmonic Cavity for ALS-U
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The ALS upgrade (ALS-U) to a diffraction-limited light source [1] depends on the ability to lengthen the stored bunches to limit the emittance growth and increase the beam life time. Higher harmonic cavities (HHCs), also known as Landau cavities, have been proposed to in-crease beam lifetime and Landau damping by lengthen-ing the bunch. We present an optimized 1.5 GHz normal conducting HHC design for the ALS-U with a supercon-ducting-like geometry using multi-objective genetic algorithm (MOGA) for lower R/Q. The optimization goal is to reach the required shunt impedance while maintain-ing a relatively high Q value of the cavities. To minimize the coupled bunch instabilities, higher-order mode (HOM) of the HHC as well as corresponding impedance are explored and characterized.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3011
EP  - 3013
KW  - cavity
KW  - impedance
KW  - higher-order-mode
KW  - simulation
KW  - wakefield
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPRB081
UR  - http://jacow.org/ipac2019/papers/weprb081.pdf
ER  -