Particle-beam diagnostics during plasma compression in the Tuman 2A tokamak

Journal Article · Thu Nov 01 04:00:00 EST 1979 · Sov. J. Plasma Phys. (Engl. Transl.); (United States)

OSTI ID:5453733

Afrosimov, V V; Berezovskii, E L; Kislyakov, A I; Khudoleev, A V; Shchemelinin, S G

The behavior of the ion temperature and density distributions during plasma compression by the toroidal magnetic field in the Tuman 2A tokamak has been studied by a multichannel particle-beam diagnostic method. Analysis of the density measurements via a numerical solution of the diffusion equation shows that the compression is accompanied by an improvement of the plasma confinement which is better than that predicted theoretically. The study of the ion temperature reveals that the ion temperature reached during the compression is different from that expected on the basis of betatron heating of the particles during the compression. A new explanation is offered for the observed ion heating. This new explanation incorporates the ion cooling during diffusion which occurs when there is a radial electric field in the plasma. It is shown that when there is such a field the ion heating is a function of the change in the plasma density during the compression.

• Research Organization: A. F. Ioffe Physicotechnical Institute, Academy of Sciences of the USSR, Leningrad
• OSTI ID: 5453733
• Journal Information: Sov. J. Plasma Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Plasma Phys. (Engl. Transl.); (United States) Vol. 5:6; ISSN SJPPD
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ADIABATIC COMPRESSION HEATING
BEAM DYNAMICS
BETATRON OSCILLATIONS
CLOSED PLASMA DEVICES
DIFFUSION
ELECTRIC HEATING
ENERGY BALANCE
HEATING
JOULE HEATING
OSCILLATIONS
PLASMA HEATING
RESISTANCE HEATING
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TUMAN DEVICES