Speaker
V. A. Skalyga
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P4.4018.pdf
High current gasdynamic electron cyclotron resonance ion sources with
gyrotron plasma heating
V.A. Skalyga, S.V. Golubev, I.V. Izotov, R.L. Lapin, S.V. Razin, R.A. Shaposhnikov,
A.F. Bokhanov, M.Yu. Kazakov
Federal Research Center Institute of Applied Physics of the Russian Academy of Sciences,
Nizhny Novgorod, Russian Federation
Fundamental research of a powerful millimeter wave gyrotron radiation interaction with an
electron cyclotron resonance (ECR) discharge plasma confined in an open magnetic trap
carried out at the Institute of Applied Physics of Russian Academy of Sciences (IAP RAS) have
resulted in development of a new type of ECR ion sources – a gasdynamic ECR ion source. The
key feature of the source is the high plasma density up to 1014 cm-3 combined with almost 100%
ionization degree and electron mean energy in the range from tens to hundreds electronvolts.
Such combination of the plasma parameters leads to a so-called quasi-gasdynamic confinement
regime and allows production of very intense beams of protons either multicharged ions for
different applications.
At SMIS 37 experimental facility equipped with 37,5 or 75 GHz / 100 kW gyrotrons in a pulsed
operation a possibility of ion beams formation with current up to 500 mA, current density at the
level of 600 – 700 mA/cm2 in combination with low emittance (normalized RMS emittance
below 0.1 π·mm·mrad) was demonstrated.
The next step in the research is a transition to continuous wave (CW) operation. For this
purpose, preliminary studies of plasma parameters were performed using a CW source with 24
GHz/5 kW gyrotron heating. To continue development of the CW gasdynamic ion source a new
experimental facility is under construction at the IAP RAS. Future source will utilize 28 and
37,5 GHz gyrotron radiation for plasma heating. Overview of the obtained results and the
status of the new source development will be presented.
According to estimations, ion source output parameters would be enough for development on
its basis of a D-D neutron generator with neutron flux density about 1010 – 1011 s-1cm-2. It is
assumed that such neutron source could be perspective as a comparably compact device for
boron neutron capture therapy studies.
Presented work is being supported in frame of realization of Federal targeted program R&D in
Priority Fields of the S&T Complex of Russia (2014-2020) contract #14.604.21.0195 (unique
identification number RFMEFI60417X0195).
