Ion--Bernstein-wave heating and improved confinement in the Alcator C tokamak

Journal Article · Mon Jan 25 04:00:00 EST 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.60.298· OSTI ID:5639264

Moody, J D; Porkolab, M; Fiore, C L; McDermott, F S; Takase, Y; Terry, J; Wolfe, S M

Plasma heating by directly launched ion Bernstein waves is investigated in the Alcator C tokamak at densities n-bar/sub e/approx. >1 x 10/sup 20/ m/sup -3/. For injected rf powers P/sub rf/approx. <180 kW, bulk ion-temperature increases of ..delta..T/sub i/approx. <380 eV, as well as improvements in global particle and central impurity confinement times by a factor of 2--3, are observed. In certain regimes, the energy confinement time improves relative to the initial Ohmic value. At higher densities (n-bar/sub e/approx. >2 x 10/sup 20/ m/sup -3/), the heating ceases to be efficient.

• Research Organization: Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
• OSTI ID: 5639264
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 60:4; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
&amp; Production
ALCATOR DEVICE
BERNSTEIN MODE
CLOSED PLASMA DEVICES
CONFINEMENT
EFFICIENCY
IMPURITIES
ION WAVES
OSCILLATION MODES
PLASMA CONFINEMENT
PLASMA WAVES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES