Fast wave ICRF minority heating experiments on the Alcator C tokamak

Conference · Tue Sep 01 00:00:00 EDT 1987 · AIP Conf. Proc.; (United States)

OSTI ID:6988154

Shepard, T D; Fiore, C L; McDermott, F S; Parker, R R; Porkolab, M

Ion cyclotron heating experiments using the fast magnetosonic wave were carried out in the Alcator C tokamak. Significant ion heating was observed as RF power up to 450 kW at 180 MHz for pulse lengths up to 200 ms was injected into Alcator C discharges with toroidal field B/sub T/ = 12 T. The majority ion species was deuterium and the minority was hydrogen. The density was scanned from n-bar/sub e/ = 0.5--5.5 x 10/sup 14/ cm/sup -3/ and the minority concentration was scanned from 0.5--8%. The largest deuterium temperature increase observed was ..delta..T/sub D/ = 412 eV, which occurred at n-bar/sub e/ = 1.4 x 10/sup 14/ cm/sup -3/, P/sub r//sub f/ = 300 kW, and ..delta..t/sub r//sub f/ = 175 ms. While both the central ion temperature increment and the net injected RF power decreased with density, the heating parameter n/sub e/..delta..T/sub D//P/sub r//sub f/ remained nearly independent of density. Experiments were conducted using two different antennas. One antenna launched power only from the low-field side of the plasma, while the other launched power from both low and high-field sides. No significant difference was observed in the heating efficiencies of the two antennas.

• Research Organization: Plasma Fusion Center, M.I.T. Cambridge, MA 02139
• OSTI ID: 6988154
• Report Number(s): CONF-870570-; TRN: 88-027492
• Journal Information: AIP Conf. Proc.; (United States), Vol. 159:1; Conference: 7. topical conference on applications of radio-frequency power to plasmas, Kissimmee, FL, USA, 4 May 1987
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALCATOR DEVICE
PLASMA HEATING
ANTENNAS
EFFICIENCY
ICR HEATING
MAGNETOACOUSTIC WAVES
PLASMA
DEUTERIUM
ENERGY SPECTRA
EXPERIMENTAL DATA
HYDROGEN
MHZ RANGE 100-1000
RF SYSTEMS
TEMPERATURE DISTRIBUTION
CLOSED PLASMA DEVICES
DATA
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
FREQUENCY RANGE
HEATING
HIGH-FREQUENCY HEATING
HYDROGEN ISOTOPES
HYDROMAGNETIC WAVES
INFORMATION
ISOTOPES
LIGHT NUCLEI
MHZ RANGE
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
SPECTRA
STABLE ISOTOPES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700108* - Fusion Energy- Plasma Research- Wave Phenomena
700101 - Fusion Energy- Plasma Research- Confinement
Heating
& Production