PAC09 - List of Authors (Souza, E.G.)

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Souza, E.G.

Paper	Title	Page
FR5PFP054	Relaxation of Intense Inhomogeneous Mismatched Charged Beams	4428
	F.B. Rizzato, A. Endler, R.P. Nunes, R. Pakter, E.G. Souza IF-UFRGS, Porto Alegre
	Funding: CNPq, Brazil; AFOSR FA9550-06-1-0345, USA In this work we analyze the dynamics of mismatched inhomogeneous beams of charged particles. Initial inhomogeneities lead to propagating density waves across the beam core, and the presence of density waves eventually results in density build up and particle scattering. Particle scattering off waves in the beam core and the presence of resonances due to envelope mismatches ultimately generate a halo of particles with concomitant emittance growth. Emittance growth directly indicates when the beam relaxes to its final stationary state, and the purpose of the present paper is to describe halo and emittance in terms of test particles moving under the action of the mismatched inhomogeneous beam. To this end we develop an average Lagrangian approach for the beam where both density and envelope mismatches are incorporated. Test particle results compare well with full simulations.

Paper

Title

Page

FR5PFP054

Relaxation of Intense Inhomogeneous Mismatched Charged Beams

4428

F.B. Rizzato, A. Endler, R.P. Nunes, R. Pakter, E.G. Souza
IF-UFRGS, Porto Alegre

Funding: CNPq, Brazil; AFOSR FA9550-06-1-0345, USA

In this work we analyze the dynamics of mismatched inhomogeneous beams of charged particles. Initial inhomogeneities lead to propagating density waves across the beam core, and the presence of density waves eventually results in density build up and particle scattering. Particle scattering off waves in the beam core and the presence of resonances due to envelope mismatches ultimately generate a halo of particles with concomitant emittance growth. Emittance growth directly indicates when the beam relaxes to its final stationary state, and the purpose of the present paper is to describe halo and emittance in terms of test particles moving under the action of the mismatched inhomogeneous beam. To this end we develop an average Lagrangian approach for the beam where both density and envelope mismatches are incorporated. Test particle results compare well with full simulations.