Abstract
Experimental data for generating intense beams of multiply charged heavy gas ions are reported. The beams are extracted from the dense plasma of an ECR discharge with quasi-gasdynamic confinement provided by the powerful microwave radiation of a gyrotron in a magnetic trap. The axisymmetric magnetic trap makes it possible to extract uniform (in transverse coordinates) plasma fluxes from it, and the use of a multiple-aperture extraction system makes it possible to increase the beam current by more than an order of magnitude compared with the ECP sources currently available. Multiply charged nitrogen ion beams with a current of 150 mA and a normalized emittance of 0.9π mm mrad are obtained.
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