ECR ION SOURCE PLASMA RELATED RESEARCH AND DEVELOPMENT AT JYFL

A device for the plasma potential measurement [1] has been developed at JYFL (University of Jyväskylä, Department of Physics). The device can be used to obtain information about the temperature of ions, plasma potential and the structure of the plasma potential of ECR ion sources. Initially the main focus of the research will be to find information about the temperature of the ions. In this article we will present the results of these measurements. A new plasma chamber for our 6.4 GHz ECRIS will be constructed in order to study the idea of modified multi-pole structure (MMPS) [2]. With this structure a very high local multi-polar magnetic field can be achieved. With the aid of the new chamber the magnetic field at the magnetic pole can be increased continuously from 0.4 T to 0.9 T. At the same time the plasma volume and the azimuthal component of multipolar field remains unaltered