| Paper | Title | Page |
|---|---|---|
TUPSA021 |
Dynamics of Intense Proton Beams in an RFQ for Different Initial Beam Distributions | |
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| Mitigation of beam halos and emittance growth that arise as a consequence of strong nonlinear space charge forces in high intensity proton linacs is a challenging task. Here we present a systematic study of the role of non-linear space-charge forces on the beam dynamics through a Radio Frequency Quadrupole (RFQ), using a fully 3-D particle-in-cell code TRACEWIN, with different initial beam distributions (Gaussian, Parabolic, Conical, 4-D water-bag and Annular) that carry different degrees of space-charge non-linearity but with equivalent rms beam parameters. Single particle dynamics was studied in order to trace the mechanism of halo formation and beam loss. We find that the lesser the degree of the space-charge non-linearity the better the beam performance, and from this point of view annular beams are best. | ||
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