Speaker
Description
GISMO, a CW high-current quasi-gasdynamic ECR ion
source, is under development at the IAP RAS. The
quasi-gasdynamic confinement regime, featuring high
plasma density (up to 10^14 cm^-3) and moderate
electron temperature (~100 eV), allowed to extract
pulsed beams of H+ and D+ ions with current of 450
mA and RMS emittance <0.07 pi mm mrad*. It has
been already demonstrated that major benefits of
quasi-gasdynamic confinement, previously tested in
pulsed mode, are scalable to the CW operational
mode. In first experiments at GISMO facility, the ion
beams were extracted in pulsed mode from the CW
plasma of ECR discharge due to technical limitations
of cooling circuits. Proton beams with current up to
70 mA were achieved at extraction voltage of 40 kV.
A new unique extraction system especially effective
for the formation of high current density ion beams
was developed and tested. Latest results of beam
current, emittance and charge state distribution
measurements are presented. Another possible
application of a quasi-gasdynamic plasma might be
the intense source of vacuum ultraviolet radiation
(VUV). Results of VUV measurements performed at
GISMO facility are also presented.