Achievement of a record electron temperature for a magnetic mirror device
Abstract
We demonstrate plasma discharges with extremely high temperature of bulk electrons at the large axially symmetric magnetic mirror device GDT (Budker Institute, Novosibirsk). According to Thomson scattering measurements, the on-axis electron temperature averaged over several sequential shots is 660 50 eV with peak values exceeding 900 eV in few shots. This corresponds to at least threefold increase as compared to previous experiments both at the GDT and at other comparable machines, thus demonstrating the maximum quasi-stationary (~1 ms) electron temperature achieved in open traps. The breakthrough is made possible with application of sophisticated electron cyclotron resonance heating in addition to standard heating by neutral beams. The reported increase of the electron temperature along with previous experiments, which demonstrated high-density plasma confinement with 60%, provide a firm basis for extrapolating to fusion relevant applications of open magnetic systems.
Keywords
Cite
@article{arxiv.1411.6288,
title = {Achievement of a record electron temperature for a magnetic mirror device},
author = {P. A. Bagryansky and E. D. Gospodchikov and A. A. Lizunov and V. V. Maximov and V. V. Prikhodko and A. G. Shalashov and E. I. Soldatkina and A. L. Solomakhin and D. V. Yakovlev},
journal= {arXiv preprint arXiv:1411.6288},
year = {2015}
}
Comments
5 pages, 3 figures, submitted to Phys. Rev. Lett