Study of plasma parameters in a continuous ECR discharge sustained by 24 GHz/5 kW gyrotron radiation in a quasi-gasdynamic mode

Recent investigations of gasdynamic ECR plasma [1] resulted in development of pulsed high current ion sources capable to deliver ion beams with 100– 500 mA current and normalized RMS emittance below 0.1 pi·mm·mrad [2] thanks to heating with mmwaveband gyrotron radiation. While the pulsed operation of gasdynamic ion sources was studied in details [1, 2], CW operation of such devices is not well investigated. SMIS 24 experimental facility was installed at the IAP RAS. At SMIS 24 the plasma is heated by 24 GHz radiation of CW gyrotron and confined in a simple mirror trap similar to SMIS 37 facility [1, 2], which was used for pulsed experiments. Detailed studies of CW gasdynamic ECR plasma parameters and ion beam extraction are presented in this work.