Speaker
Dr
Peter Bagryansky
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Description
Worldwide activity of studies of plasma confinement in magnetic mirror traps decreased dramatically in the late 80's of the last century. The reason is that the mirror concept is thought to have three unattractive characteristics. The magnets are complex, the plasma is plagued with micro-instabilities and the electron temperature would never approach required keV levels. Researches on the Gas Dynamic Trap (GDT) device at the Budker Institute of Nuclear Physics demonstrated the possibility to overcome these three deficiencies. Stable high energy density plasma can be confined with simple circular magnets [1,2], micro-instabilities can be tamed [3], and electron temperatures reaching a keV have been measured [4,5]. These three accomplishments provide a basis to reconsider the mirror concept as a neutron source for materials development, nuclear fuel production, and fusion energy production. Furthermore, these three achievements allowed to go to the next level of tasks, aimed at support of the next generation of research facilities, as well as fusion reactors based on mirror traps. List of the most important next-level problems includes optimization of heating modes using neutral beam injection and auxiliary ECR heating and a detailed study of physical processes in the divertors (regions with an expanding magnetic field behind the magnetic mirrors), limiting longitudinal energy losses.
The proposed report includes a brief overview of researches on the stabilization of MHD instabilities, study of micro-instabilities, and demonstration a tangible increase of the electron temperature with application of auxiliary ECR heating. According to Thomson scattering data, the electron temperature exceeds 0.9 keV thus demonstrating more than threefold increase as compared with modes, where only neutral beams were applied [4,5]. Part of the report is focused on the study a number of physical processes in the divertor, which determine the longitudinal energy transport.
References
1) Beklemishev, A.D. Bagryansky, P.A. Chaschin, M.S. and Soldatkina, E.I., Fusion Sci. Technol. 57, 351 (2010).
2) Simonen, T.C. Anikeev, A.V. Bagryansky, P.A. et al., J. Fusion Energ. 29, 558 (2010)
3) Zaytsev, K.V. Anikeev, A.V. Bagryansky, P.A., et al., Physica Scripta Vol. 2014 Number T161, 014004 (2014).
4) P.A. Bagryansky, A.G. Shalashov, E.D. Gospodchikov, et al., Physical Review Letters, 114, 205001 (2015).
5) P.A. Bagryansky, A.V.Anikeev, G.G.Denisov, et al., Nuclear Fusion, 55 (2015) 053009
Primary author
Dr
Peter Bagryansky
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Co-authors
Dr
Alexander Dunaevsky
(Tri Alpha Energy Inc., Foothill Ranch CA, USA)
Dr
Alexander Shalashov
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Dr
Alexandr Ivanov
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mr
Alexandr Solomakhin
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Dr
Andrey Anikeev
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mr
Andrey Lizunov
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mr
Dmitriy Yakovlev
(Novosibirsk State University, Novosibirsk, Russia)
Dr
Egor Gospodchikov
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mrs
Elena Soldatkina
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mr
Evgeniy Pinzhenin
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mr
Konstantin Zaytsev
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mrs
Mariya Korzhavina
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mr
Mikhail Anikeev
(Novosibirsk State University, Novosibirsk, Russia)
Ms
Olga Korobeynikova
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Dr
Peter Yushmanov
(Tri Alpha Energy Inc., Foothill Ranch CA, USA)
Mr
Sergej Murakhtin
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mr
Vadim Prikhodko
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mr
Valeriy Savkin
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mr
Vladimir Maximov
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
Mr
Yuriy Kovalenko
(Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia)
