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RIS citation export for MOPGW039: Investigation of Longitudinal Beam Dynamics With Harmonic Cavities by Using the Code Mbtrack

AU  - Yamamoto, N.
AU  - Gamelin, A.
AU  - Nagaoka, R.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Investigation of Longitudinal Beam Dynamics With Harmonic Cavities by Using the Code Mbtrack
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - In diffraction-limited light sources, the study of collective effects is essential. With harmonic cavities (HCs), the ’flat potential condition’ can be achieved, lengthening the bunch by a factor of ~5. However, the effective rf voltage seen by the beam becomes sensitive to both positions and distributions of all bunches, as the beam-induced voltage of both HCs and fundamental cavities (FCs) contribute. In addition, when there are empty buckets, the transient beam loading induces considerable variations of the rf voltage impacting the beam performance*. Here the use of analytical approaches is difficult. Then we introduced the new functions to treat the high-Q resonators driven by either or both of the beams and external generators to the code mbtrack**. Using these features, various operating conditions with arbitrary fill patterns can be studied; coupled bunch instability induced by HOMs of the cavity, Robinson instabilities and general beam dynamics with HCs. The growth rates of the instabilities described above are compared with analytical results. The ring performance with HCs in several fill patterns shall be also reported.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 178
EP  - 180
KW  - cavity
KW  - impedance
KW  - operation
KW  - synchrotron
KW  - beam-loading
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPGW039
UR  - http://jacow.org/ipac2019/papers/mopgw039.pdf
ER  -