| Title |
Beam-Loading Transients and Bunch Shape in the Operation of Passive Harmonic Cavities in the ALS-U |
| Authors |
- Z. Pan, S. De Santis, C. Steier, C. Sun, M. Venturini
LBNL, Berkeley, USA
- T. Hellert
DESY, Hamburg, Germany
- C.-X. Tang
TUB, Beijing, People's Republic of China
|
| Abstract |
The ALS-U is a major upgrade of the LBNL ALS to a diffraction limited light source. The current plan is to replace all the vacuum and magnet components while retaining the existing 500 MHz main and third-harmonic, passively operated, rf cavities, but replacement of the existing rf cavities is also being considered. A new feature, is represented by beam-loading transients associated with a beam consisting of 11 bunch trains separated by 10 ns gaps as needed to enable on-axis swap-out injection. In this paper we study these transients and the associated bunch-to-bunch phase, length, and profile variations.
|
| Paper |
download THPAK037.PDF [0.291 MB / 3 pages] |
| Export |
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| Conference |
IPAC2018, Vancouver, BC, Canada |
| Series |
International Particle Accelerator Conference (9th) |
| Proceedings |
Link to full IPAC2018 Proccedings |
| Session |
MC5 Poster Session |
| Date |
03-May-18 09:00–12:00 |
| Main Classification |
05 Beam Dynamics and EM Fields |
| Sub Classification |
D04 Beam Coupling Impedance - Theory, Simulations, Measurements, Code Developments |
| Keywords |
cavity, simulation, beam-loading, impedance, controls |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editors |
Shane Koscielniak (TRIUMF, Vancouver, BC, Canada); Todd Satogata (JLab, Newport News, VA, USA); Volker RW Schaa (GSI, Darmstadt, Germany); Jana Thomson (TRIUMF, Vancouver, BC, Canada) |
| ISBN |
978-3-95450-184-7 |
| Published |
June 2018 |
| Copyright |
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