A spectral method for halo particle definition in intense mismatched beams
An advanced spectral analysis of a mismatched charged particle beam propagating through a periodic focusing transport lattice is utilized in particle-in-cell (PIC) simulations. It is found that the betatron frequency distribution function of a mismatched space-charge-dominated beam has a bump-on-tai...
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| Veröffentlicht in: | Physics of plasmas 2011-04, Vol.18 (4), p.043109-043109-9 |
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| container_end_page | 043109-9 |
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| container_issue | 4 |
| container_start_page | 043109 |
| container_title | Physics of plasmas |
| container_volume | 18 |
| creator | Dorf, Mikhail A. Davidson, Ronald C. Startsev, Edward A. |
| description | An advanced spectral analysis of a mismatched charged particle beam propagating through a periodic focusing transport lattice is utilized in particle-in-cell (PIC) simulations. It is found that the betatron frequency distribution function of a mismatched space-charge-dominated beam has a bump-on-tail structure attributed to the beam halo particles. Based on this observation, a new spectral method for halo particle definition is proposed that provides the opportunity to carry out a quantitative analysis of halo particle production by a beam mismatch. In addition, it is shown that the spectral analysis of the mismatch relaxation process provides important insights into the emittance growth attributed to the halo formation and the core relaxation processes. Finally, the spectral method is applied to the problem of space-charge transport limits. |
| doi_str_mv | 10.1063/1.3574665 |
| format | Article |
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It is found that the betatron frequency distribution function of a mismatched space-charge-dominated beam has a bump-on-tail structure attributed to the beam halo particles. Based on this observation, a new spectral method for halo particle definition is proposed that provides the opportunity to carry out a quantitative analysis of halo particle production by a beam mismatch. In addition, it is shown that the spectral analysis of the mismatch relaxation process provides important insights into the emittance growth attributed to the halo formation and the core relaxation processes. 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| ispartof | Physics of plasmas, 2011-04, Vol.18 (4), p.043109-043109-9 |
| issn | 1070-664X 1089-7674 |
| language | eng |
| recordid | cdi_osti_scitechconnect_21537663 |
| source | AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection |
| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY BEAMS CHARGED-PARTICLE TRANSPORT DISTRIBUTION FUNCTIONS FOCUSING FUNCTIONS PARTICLE ACCELERATORS PARTICLE BEAMS PARTICLE PRODUCTION RADIATION TRANSPORT SPACE CHARGE |
| title | A spectral method for halo particle definition in intense mismatched beams |
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