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

Abstract

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.

Authors:
; ; ;
Publication Date:
Research Org.:
Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
OSTI Identifier:
5938903
Resource Type:
Journal Article
Journal Name:
J. Appl. Phys.; (United States)
Additional Journal Information:
Journal Volume: 52:12
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Woskoboinikow, P, Praddaude, H C, Falconer, I S, and Mulligan, W J. Heterodyne measurements of electron cyclotron emission from Alcator A and absolute submillimeter receiver calibration. United States: N. p., 1981. Web. doi:10.1063/1.328418.
Woskoboinikow, P, Praddaude, H C, Falconer, I S, & Mulligan, W J. Heterodyne measurements of electron cyclotron emission from Alcator A and absolute submillimeter receiver calibration. United States. https://doi.org/10.1063/1.328418
Woskoboinikow, P, Praddaude, H C, Falconer, I S, and Mulligan, W J. 1981. "Heterodyne measurements of electron cyclotron emission from Alcator A and absolute submillimeter receiver calibration". United States. https://doi.org/10.1063/1.328418.
@article{osti_5938903,
title = {Heterodyne measurements of electron cyclotron emission from Alcator A and absolute submillimeter receiver calibration},
author = {Woskoboinikow, P and Praddaude, H C and Falconer, I S and Mulligan, W J},
abstractNote = {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.},
doi = {10.1063/1.328418},
url = {https://www.osti.gov/biblio/5938903}, journal = {J. Appl. Phys.; (United States)},
number = ,
volume = 52:12,
place = {United States},
year = {Tue Dec 01 00:00:00 EST 1981},
month = {Tue Dec 01 00:00:00 EST 1981}
}