Plasma system of the GOL-3T facility
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Plasma System of the GOL-3T Facility A. V. Arzhannikova, b, A. V. Burdakova, c, V. S. Burmasova, b, I. A. Ivanova, b, S. A. Kuznetsovb, K. N. Kuklina, K. I. Meklera, S. V. Polosatkina, b, V. V. Postupaeva, b, A. F. Rovenskikha, S. L. Sinitskya, b, and V. F. Sklyarova, b a
Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 11, Novosibirsk, 630090 Russia b Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090 Russia c Novosibirsk State Technical University, pr. Karla Marksa 20, Novosibirsk, 630073 Russia e-mail: [email protected] Received May 14, 2015
Abstract—The plasma system and diagnostics of the new facility GOL-3T are described. This facility is the final result of the first stage in the deep upgrade of the GOL-3 multiple-mirror system, which has operated at the Budker Institute of Nuclear Physics since 1988. The upgrade project supposes creation of two new independent facilities at the site of GOL-3. The GOL-3T facility is intended to study the physics of beam– plasma interaction and generation of subterahertz electromagnetic radiation during the collective relaxation of a high-power relativistic electron beam with a duration of 5–10 μs. Studies on the physics of multiple-mirror plasma confinement in axisymmetric magnetic systems will be continued in a new range of experiment parameters at the second facility, named GOL-NB. DOI: 10.1134/S1063780X1511001X
1. INTRODUCTION Studies of the processes of collective relaxation of an electron beam in plasma occupy an important place in plasma physics. These processes determine the properties and behavior of plasma in such widelyspaced fields as the dynamics of star atmospheres and heating of thermonuclear targets in the scheme of fast ignition. The parameters of laboratory experiments on this subject vary in a very wide range—from stationary low-current electron beams injected into rarefied gasdischarge plasma to high-power pulsed megampere relativistic electron beams (REBs). The GOL-3 facility, which has operated at the Budker Institute of Nuclear Physics (Novosibirsk) since 1988, is one of the largest facilities intended to study the physics of beam–plasma interaction. The main scientific problem at which the GOL-3 facility was aimed was to find conditions for the fast collective heating of plasma confined in a multiplemirror system. The GOL-3 project was based on the existing concepts of beam–plasma interaction physics that were formulated using results of several smallscale REB experiments with beam durations of 30– 100 ns and total energy contents on the order of 1 kJ. When constructing the GOL-3 facility, it was decided to preserve the specific parameters of the electron beam and plasma, but significantly (by two orders of magnitude) increase the duration and energy of the beam. The design parameters of the first stage of the
GOL-3 facility were as follows [1]: the plasma density of 1021 m–3, the plasma column length of 7 m, the plasma diameter of 8 cm, the guiding solenoid
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