Field structure and electron life times in the MEFISTO electron cyclotron resonance ion source

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:266

Article

Bodendorfer, M.^1,2  Altwegg, K.¹  Shea, H.²  Wurz, P.¹ 

[1] Univ Bern, Inst Phys Space Res & Planetary Sci, CH-3012 Bern, Switzerland

[2] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

关键词: ECR ion source;    ECR;    simulation;    electron;    magnetic field;    confinement;    trajectories;    electron trajectories;    permanent magnet;    hexapole;    space charge;    beam;    ion beam;    anisotropic;    isotropic;    distribution;   

DOI  :  10.1016/j.nimb.2008.01.038

来源: Elsevier

【 摘 要 】

The complex magnetic field of the permanent magnet electron cyclotron resonance (ECR) ion source MEFISTO located at the University of Berne has been numerically simulated. For the first time the magnetized volume qualified for electron cyclotron resonance at 2.45 GHz and 87.5 mT has been analyzed in highly detailed 3D simulations with unprecedented resolution. New results were obtained from the numerical simulation of 25,211 electron trajectories. The evident characteristic ion sputtering trident of hexapole confined ECR ion sources has been identified with the field and electron trajectory distribution. Furthermore, unexpected long electron trajectory lifetimes were found. (c) 2008 Elsevier B.V. All rights reserved.

【 授权许可】

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