2nd--5th electron cyclotron harmonic emission from thermal plasmas in Alcator A

Journal Article · Thu Oct 01 00:00:00 EDT 1981 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.92789· OSTI ID:6245356

Woskoboinikow, P; Praddaude, H C; Falconer, I S; Mulligan, W J

A sensitive submillimeter heterodyne receiver has been used to measure electron cyclotron emission at the 2nd through the 5th harmonics from thermal plasmas in Alcator A. A sensitive diagnostic of the electron energy distribution function is obtained from intensity ratios of the optically thin harmonics, in particular the small runaway fraction (approx.10/sup -6/) that exists even in well thermalized Alcator A plasmas. Also the 4th and 5th harmonics are a sensitive measure of impending plasma disruption due to vessel air leaks.

• Research Organization: Plasma fusion center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
• OSTI ID: 6245356
• Journal Information: Appl. Phys. Lett.; (United States), Vol. 39:7
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALCATOR DEVICE
CYCLOTRON HARMONICS
PLASMA DIAGNOSTICS
AIR
DISTRIBUTION FUNCTIONS
ELECTRON CYCLOTRON-RESONANCE
ENERGY SPECTRA
HETERODYNE RECEIVERS
LEAKS
PLASMA
SENSITIVITY
CLOSED PLASMA DEVICES
CYCLOTRON RESONANCE
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUIDS
FUNCTIONS
GASES
HARMONICS
MICROWAVE EQUIPMENT
OSCILLATIONS
RADIO EQUIPMENT
RESONANCE
SPECTRA
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics