Multicharged ion source based on the tornado closed magnetic confinement system

It is proposed to use the Tornado closed magnetic confinement system with m icrowave plasma beating for creating a pulsed source of multicharged ions. The plasma losses in closed confinement systems are determined by the diffu sion across the magnetic field, which substantially increases the plasma li fetime as compared to mirror confinement systems. A plasma heating scenario with the successive switching-on of two oscillators is proposed: an oscill ator operating at a frequency of 2.45 GHz produces the initial plasma, whic h is then heated at a frequency of 15 or 53 GHz. It is shown that it is pos sible to achieve the distribution of ions over char-e states with a maximum at Ar16+ at a plasma density of 2 x 10(13) cm(-3). The extracted ion cut-r ent in this case can attain 1 A. (C) 2001 MAIK "Nauka/Interperiodica".