Space charge lens for focusing negative-ion beams
نویسندگان
چکیده
منابع مشابه
Space Charge Lens for Focusing Heavy Ion Beams
Space charge lenses use a confined electron cloud for the focusing of ion beams. Due to the electric space charge field, the focusing is independent of the particle mass. For this reason the application of space charge lenses especially in the field of heavy ion beams is advantageous. Moreover, the trapped non neutral plasma cloud compensates the space charge forces of the ion beam. The focusin...
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A promising approach for LEBT systems are Gabor Plasma Lenses using a stable space charge cloud [1]. The confinement of the electrons by external fields leads to focusing of ion beams at drastically reduced magnetic and electric field strength compared to conventional ion optics. Therefore in former experiments the fundamental properties of the electron cloud so called nonneutral plasma were st...
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It has been empirically observed in both experiments and particle-in-cell simulations that space-charge-dominated beams suffer strong growth in statistical phasespace area (degraded quality) and particle losses in alternating gradient quadrupole transport channels when the undepressed phase advance σ0 increases beyond about 85 per lattice period. Although this criterion has been used extensivel...
متن کاملLongitudinal Effects and Focusing in Space-charge Dominated Beams
Title of Thesis: LONGITUDINAL EFFECTS AND FOCUSING IN SPACE-CHARGE DOMINATED BEAMS Degree candidate: John Richardson Harris Degree and year: Master of Science, 2002 Thesis directed by: Professor Patrick G. O'Shea Department of Electrical and Computer Engineering The purpose of this thesis is to investigate longitudinal effects in space-charge dominated beams, and to begin design of a longitudin...
متن کاملModeling Space Charge in Beams for Heavy-Ion Fusion
A new analytic model is presented which accurately estimates the radially averaged axial component of the space&age field of an axisymmetric heavy-ion beam in a cylindrical beam pipe. The model recovers details of the field near the beam ends that are overlooked by simpler models, and the results compare well to exact solutions of Poisson’s equation. Field values are shown for several simple be...
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ژورنال
عنوان ژورنال: Plasma Physics Reports
سال: 2001
ISSN: 1063-780X,1562-6938
DOI: 10.1134/1.1364553