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  • Title: Operation of the CAPRICE electron cyclotron resonance ion source applying frequency tuning and double frequency heating.
    Author: Maimone F, Tinschert K, Celona L, Lang R, Mäder J, Rossbach J, Spädtke P.
    Journal: Rev Sci Instrum; 2012 Feb; 83(2):02A304. PubMed ID: 22380151.
    Abstract:
    The properties of the electromagnetic waves heating the electrons of the ECR ion sources (ECRIS) plasma affect the features of the extracted ion beams such as the emittance, the shape, and the current, in particular for higher charge states. The electron heating methods such as the frequency tuning effect and the double frequency heating are widely used for enhancing the performances of ECRIS or even for the routine operation during the beam production. In order to better investigate these effects the CAPRICE ECRIS has been operated using these techniques. The ion beam properties for highly charged ions have been measured with beam diagnostic tools. The reason of the observed variations of this performance can be related to the different electromagnetic field patterns, which are changing inside the plasma chamber when the frequency is varying.
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