Speaker
Dr
Sergey Polosatkin
(Budker Institute of Nuclear Physics, Novosibirsk State University, Novosibirsk State Technical University)
Description
Helicons (circularly-polarized electromagnetic waves) propagate in a plasma with density exceeded cut-off for its frequency, and provide effective energy delivery to plasma. Accordingly, helicon discharge is one of the most suitable way for production of high-density low-temperature plasma. Helicon plasma sources, operating in the MHz frequency range and respectively low magnetic fields (0.01-0.1 T), capable to create plasma with density up to 10$^{14}$ cm$^{-3}$. At the same time, next generation of linear plasma facilities for both for PMI studies and fusion applications requires production of plasma with density above this limit. Theoretical studies predict that such increasing of density can be achieved by application of powerful microwave sources of GHz range frequency. The aim of the presented experiments is experimental verification of theoretical predictions and search of conditions for effective delivery of electromagnetic power to plasma towards development of stationary source of dense plasma for linear facilities.
Interaction of 2.45 GHz electromagnetic radiation with low-temperature plasma column, confined in a strong magnetic field, was studied on the GOL-3 facility. Plasma was created by external source (arc plasma gun) placed on the edge of the facility. Microwave power is transferred from moderate power (1.4 kW) magnetron source to o-ring antenna, separated from plasma column by quartz tube. Coupling of antenna with plasma (reflected-to-direct wave ratio) and spatial structure of the wave are measured for various plasma densities and magnetic fields in the facility. The results of experiments supports theoretical prediction of effective coupling of GHz-range electromagnetic waves with plasma.
Primary author
Dr
Sergey Polosatkin
(Budker Institute of Nuclear Physics, Novosibirsk State University, Novosibirsk State Technical University)
Co-authors
Prof.
Aleksandr Burdakov
(Budker Institute of Nuclear Physics, Novosibirsk State University, Novosibirsk State Technical University)
Mr
Anatoly Murasev
(Budker Institute of Nuclear Physics)
Mr
Evgeny Sidorov
(Budker Institute of Nuclear Physics)
Prof.
Igor Kotelnikov
(Budker Institute of Nuclear Physics, Novosibirsk State University)
Dr
Ivan Ivanov
(Budker Institute of Nuclear Physics, Novosibirsk State University)
Mr
Mikhail Minaylo
(Novosibirsk State University)
Dr
Peter Kalinin
(Budker Institute of Nuclear Physics, Novosibirsk State University)
Mr
Vladimir Batkin
(Budker Institute of Nuclear Physics)
Dr
Vladimir Burmasov
(Budker Institute of Nuclear Physics, Novosibirsk State University)
Dr
Vladimir Postupaev
(Budker Institute of Nuclear Physics, Novosibirsk State University)
Mr
konstantin mekler
(Budker Institute of Nuclear Physics)
