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RIS citation export for MOP13: Influence of Transverse Motion on Longitudinal Space Charge in the CERN PS

AU  - Laut, A.J.
AU  - Lasheen, A.
ED  - Gianfelice, Eliana
ED  - Nagaitsev, Sergei
ED  - Kim, Dong Eon
ED  - Marx, Michaela
ED  - Schaa, Volker R. W.
TI  - Influence of Transverse Motion on Longitudinal Space Charge in the CERN PS
J2  - Proc. of HB2021, Batavia, IL, USA, 04-08 October 2021
CY  - Batavia, IL, USA
T2  - ICFA ABDW on High-Intensity and High-Brightness Hadron Beams
T3  - 64
LA  - english
AB  - 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.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 83
EP  - 88
KW  - space-charge
KW  - synchrotron
KW  - emittance
KW  - impedance
KW  - optics
DA  - 2022/04
PY  - 2022
SN  - 2673-5571
SN  - 978-3-95450-225-7
DO  - doi:10.18429/JACoW-HB2021-MOP13
UR  - https://jacow.org/hb2021/papers/mop13.pdf
ER  -