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(EXP1/13) First Results on Dense Plasma Confinement at the Multimirror Open Trap GOL-3-II

V. S. Koidan¹⁾, A. V. Arzhannikov¹⁾, V. T. Astrelin¹⁾, A. V. Burdakov¹⁾, I. A. Ivanov¹⁾, S. A. Kuznetsov¹⁾, K. I. Mekler¹⁾, S. A. Novozhilov¹⁾, S. V. Polosatkin¹⁾, V. V. Postupesv¹⁾, A. F. Rovenskikh¹⁾, A. V. Savchkov¹⁾, S. L. Sinitsky
 
¹⁾ Budker Institute of Nuclear Physics, Novosibirsk, Russia

Abstract.  First results of experiments on plasma confinement in multimirror open trap GOL-3-II are presented. This facility is an open trap with total length of 17 m intended for confinement of a relatively dense ( 10¹⁵ - 10¹⁷cm^{- 3}) plasma in axially-symmetrical magnetic system. The plasma heating is provided by a high-power electron beam (1 MeV, 30 kA, 8 ms, 200 kJ). New phase of the experiments is aimed to confinement of high-$\beta$ thermalized plasma. Two essential modifications of the facility have been done. First, plasma column was separated by vacuum sections from the beam accelerator and exit beam receiver. Second, the magnetic field on part of the solenoid was reconfigured into multimirror system with H_max/H_min $\sim$ 1.5 and 22 cm cell length. Results of the experiments at modified configuration of the device indicate that the confinement time of the plasma with n_e $\sim$ (0, 5÷5) ^. 10¹⁵cm^{- 3} and T_e $\sim$ 1 keV increases more than order of magnitude.

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