HB2021 - List of Authors (Laut, A.J.)

Paper	Title	Page
MOP13	Influence of Transverse Motion on Longitudinal Space Charge in the CERN PS	83
	A.J. Laut, A. Lasheen CERN, Geneva 23, Switzerland
	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.
	Poster MOP13 [1.826 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-HB2021-MOP13
About •	Received ※ 16 October 2021 — Revised ※ 22 October 2021 — Accepted ※ 12 December 2021 — Issued ※ 11 April 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Influence of Transverse Motion on Longitudinal Space Charge in the CERN PS

83

A.J. Laut, A. Lasheen
CERN, Geneva 23, Switzerland

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.

Poster MOP13 [1.826 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-HB2021-MOP13

About •

Received ※ 16 October 2021 — Revised ※ 22 October 2021 — Accepted ※ 12 December 2021 — Issued ※ 11 April 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)