High-density plasma production with potential confinement in the GAMMA 10 tandem mirror

Ichimura, M Cho, T Hirata, M Hojo, H Ishii, K Itakura, A Katanuma, I Kohagura, J Nakashima, Y Saito, T Tamano, T Tanaka, S Tatematsu, Y Yatsu, K Yoshikawa, M

M. Ichimura et al., High-density plasma production with potential confinement in the GAMMA 10 tandem mirror, PHYS PLASMA, 8(5), 2001, pp. 2066-2070

18

INGLESE

Article

Physics

PHYSICS OF PLASMAS

1070-664X → ACNP

8

5

2001

2

2066 - 2070

ISI

1070-664X(200105)8:5<2066:HPPWPC>2.0.ZU;2-S

The improvement of potential confinement was attained in the GAMMA 10 tande m mirror [Phys. Rev. Lett. 55, 939 (1985); Proceedings of the 13th Internat ional Conference on Plasma Physics and Controlled Nuclear Fusion Research, Washington, 1990 (International Atomic Energy Agency, Vienna, 1991), Vol. 2 , p. 539] by axisymmetrization of heating systems for the plasma production , heating, and potential formation. A significant increase of the density a nd diamagnetism by the potential confinement was observed. In the previous experiment, it was difficult to increase the central cell density higher th an 2.7x10(18) m(-3). One of the possible mechanisms is the density clamping due to the eigenmode formation of the ion-cyclotron-range of frequency (IC RF) waves in the axial direction. With high harmonic ICRF waves (RF3), the experiments to overcome this problem have been performed. In preliminary ex periments with RF3 and NBI the maximum density of 4x10(18) m(-3) was attain ed. (C) 2001 American Institute of Physics.