| Title |
Influence of Transverse Motion on Longitudinal Space Charge in the CERN PS |
| Authors |
- A.J. Laut, A. Lasheen
CERN, Geneva 23, Switzerland
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| Abstract |
Particles in an intense bunch experience longitudinal self-fields due to space~charge. This effect, conveniently described by geometric factors dependent on a particle’s transverse position, beam size, and beam pipe aperture, is usually incorporated into longitudinal particle tracking on a per-turn basis. The influence of transverse betatron motion on longitudinal space~charge forces is, however, usually neglected in pure longitudinal tracking codes. A dedicated tracking code was developed to characterize the CERN PS such that an effective geometric factor of a given particle could be derived from its transverse emittance, betatron phase~advance, and momentum~spread. The effective geometry factor is then estimated per particle by interpolation without the need for full transverse tracking and incorporated into the longitudinal tracker BLonD. The paper evaluates this effect under conditions representative of the PS, where space~charge is dominant at low energy and progressively becomes negligible along the acceleration ramp. The synchrotron frequency distribution is modified and the filamentation rate is moreover increased, which could suggest a stabilizing space~charge phenomenon.
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| Paper |
download MOP13.PDF [1.433 MB / 6 pages] |
| Poster |
download MOP13_POSTER.PDF [1.826 MB] |
| Cite |
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※ EndNote |
| Conference |
HB2021 |
| Series |
ICFA ABDW on High-Intensity and High-Brightness Hadron Beams (64th) |
| Location |
Batavia, IL, USA |
| Date |
04-08 October 2021 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Eliana Gianfelice (FNAL, Batavia, IL, USA); Sergei Nagaitsev (FNAL, Batavia, IL, USA); Dong Eon Kim (PAL, Pohang, South Korea); Michaela Marx (DESY, Hamburg, Germany); Volker R. W. Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-225-7 |
| Online ISSN |
2673-5571 |
| Received |
16 October 2021 |
| Revised |
22 October 2021 |
| Accepted |
12 December 2021 |
| Issue Date |
11 April 2022 |
| DOI |
doi:10.18429/JACoW-HB2021-MOP13 |
| Pages |
83-88 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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