Speaker
Dr
Andrey Sanin
(Budker Institute of Nuclear Physics)
Description
G. Abdrashitov, Yu. Belchenko, A. Ivanov, S. Konstantinov, A. Sanin, N. Stupishin, O. Sotnikov and I. Shikhovtsev
Budker Institute of Nuclear Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
A stable H- beam with a current $\sim$1A and energy 90 kV was routinely extracted and accelerated from the long-pulse surface-plasma source prototype, developed at BINP for N-NBI use. The H- ions are produced on the hot surface of a plasma grid, covered by cesium and illuminated by fast plasma particles from the inductively driven radio-frequency discharge. A multiaperture, three-electrode ion optical system is used for beam formation. The essential BINP source features are: 1) an active temperature control of the ion-optical system electrodes by circulation of hot thermal fluid through the channels, drilled in the electrode bodies, and 2) the directed cesium deposition to the plasma grid electrode using a long tube, connected to the plasma grid periphery. The long term effect of cesium was obtained just with the single cesium deposition. The high voltage strength of ion-optical system electrodes was improved with actively heated electrodes. The 90 keV H- beam is transported to the entrance of the high-voltage post-accelerator with the help of the low energy beam transport section
Primary author
Dr
Andrey Sanin
(Budker Institute of Nuclear Physics)
Co-authors
Prof.
Alexander Ivanov
(Budker Institute of Nuclear Physics)
Mr
Grigoriy Abdrashitov
(Budker Institute of Nuclear Physics)
Dr
Igor Shikhovtsev
(Budker Institute of Nuclear Physics)
Mr
Nikolay Stupishin
(Budker Institute of Nuclear Physics)
Mr
Oleg Sotnikov
(Budker Institute of Nuclear Physics)
Dr
Petr Deichuli
(Budker Institute of Nuclear Physics)
Mr
Sergey Konstantinov
(Budker Institute of Nuclear Physics)
Prof.
Yuri Belchenko
(Budker Institute of Nuclear Physics)
