Heterodyne measurements of electron cyclotron emission from Alcator A and absolute submillimeter receiver calibration

Journal Article · Tue Dec 01 00:00:00 EST 1981 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.328418· OSTI ID:5938903

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

Electron cyclotron emission (ECE) from thermal plasmas in the Alcator A tokamak for harmonics from 2nd through 5th and up to the 7th harmonic for nonthermal plasmas have been observed in the frequency range of 400--800 GHz using a sensitive, low-noise submillimeter heterodyne receiver. The sensitivity of the receiver (approx.10/sup -20/ W Hz/sup -1/) allowed for the measurement of 4th and 5th harmonic ECE from thermal plasmas with T/sub e/roughly-equal800 eV. The receiver was absolutely calibrated and its field of view was experimentally determined. A careful analysis has been made to relate the receiver calibration to the plasma-emitting volume, taking into account radiation coherence time, wall reflections, polarization scrambling, window losses, and aperture restrictions.

• Research Organization: Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
• OSTI ID: 5938903
• Journal Information: J. Appl. Phys.; (United States), Vol. 52:12
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALCATOR DEVICE
ELECTRON CYCLOTRON-RESONANCE
HETERODYNE RECEIVERS
CALIBRATION
CYCLOTRON RADIATION
GHZ RANGE
HARMONICS
PLASMA
SENSITIVITY
TOKAMAK DEVICES
BREMSSTRAHLUNG
CLOSED PLASMA DEVICES
CYCLOTRON RESONANCE
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY RANGE
MICROWAVE EQUIPMENT
OSCILLATIONS
RADIATIONS
RADIO EQUIPMENT
RESONANCE
THERMONUCLEAR DEVICES
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production