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Focusing of laser-generated ion beams by a plasma cylinder: similarity theory and the thick lens formula | | S.Gordienko
; T.Baeva
; A.Pukhov
; PostScript
; PDF
; Other formats
; | | Date: |
8 Nov 2005 | | Subject: | Plasma Physics; Accelerator Physics | | Abstract: | It is shown that plasma-based optics can be used to guide and focus highly divergent laser-generated ion beams. A hollow cylinder is considered, which initially contains a hot electron population. Plasma streaming toward the cylinder axis maintains a focusing electrostatic field due to the positive radial pressure gradient. The cylinder works as thick lens, whose parameters are obtained from similarity theory for freely expanding plasma in cylindrical geometry. Because the lens parameters are energy dependent, the lens focuses a selected energy range of ions and works as a monochromator. Because the focusing is due to the quasineutral part of the expanding plasma, the lens parameters depend on the hot electron temperature $T_e$ only, and not their density. | | Source: | arXiv, physics/0511070 | | Services: | Forum | Review | PDF | Favorites | |
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