Longitudinal halo in beam bunches with self-consistent 6-D distributions

Details Longitudinal halo in beam bunches with self-consistent 6-D distributions Longitudinal halo in beam bunches with self-consistent 6-D distributions

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aipc..448..245g&link_type=abstract

Workshop on space charge physics in high intensity hadron rings. AIP Conference Proceedings, Volume 448, pp. 245-253 (1998).

Physics

Electrostatic, Collective, And Linear Accelerators, Beam Dynamics, Collective Effects And Instabilities, Beam Handling, Beam Transport

Scientific paper

We have explored the formation of longitudinal and transverse halos in 3-D axisymmetric beam bunches by starting with a self-consistent 6-D phase space distribution. Stationary distributions allow us to study the halo development mechanism without being obscured by beam redistribution and its effect on halo formation. The beam is then mismatched longitudinally and/or transversely, and we explore the rate, intensity and spatial extent of the halos which form, as a function of the beam charge and the mismatches. We find that the longitudinal halo forms first because the longitudinal tune depression is more severe than the transverse one for elongated bunches and conclude that it plays a major role in halo formation.

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