beam-losses

Paper	Title	Other Keywords	Page
MOA2IS03	Towards the Description of Long Term Self Consistent Effects in Space Charge Induced Resonance Trapping	simulation, space-charge, resonance, emittance	65
	G. Franchetti, I. Hofmann GSI, Darmstadt S. Machida CCLRC/RAL/ASTeC, Chilton, Didcot, Oxon
	In recent studies the effect of the space charge induced trapping has been shown relevant for long term storage of bunches. There the mechanism of emittance growth and beam loss have been studied for frozen bunch particle distribution. However, when beam loss or halo density are large enough, this approximation have to be reconsidered. We present here a first study on the effect of self consistency in frozen models as intermediate step towards fully 2.5 and 3D simulations.
	Slides
TUPPP05	A Space Charge Algorithm for the Bunches of Elliptical Cross Section with Arbitrary Beam Size and Particle Distribution	space-charge, linac, controls, antiproton	106
	A. Orzhekhovskaya, G. Franchetti GSI, Darmstadt
	Algorithms of analytical and semi-analytical calculation of the electric field for the bunches of variable elliptical cross section are proposed. An arbitrary space charge distribution is fitted on the interval of consideration by the polynom of optimal order. In the case of an axisymmetric 3D ellipsoidal bunch or an arbitrary 2D elliptic cross section of the bunch the analytic solution is derived. For the bunch of variable elliptical cross section proposed method is developed to a numerical method using longitudinal grid. Tests of the field computation show high accuracy of the calculations and good agreement of the algorithms with the general theory. The methods are applied to the space charge modeling for the GSI project "Facility for Antiproton and Ion Research at Darmstadt" (FAIR), where particle loss must be calculated during long term storage, and to the code benchmarking in frame of the project "High Intensity Pulsed Proton Injector" (HIPPI).