Fast scanning heterodyne receiver for the measurement of the time evolution of the electron temperature profile on the Tokamak Fusion Test Reactor

G. Taylor; P. C. Efthimion; M. McCarthy; E. Fredd; M. A. Goldman; D. Kaufman

doi:10.1063/1.1138045

Fast scanning heterodyne receiver for the measurement of the time evolution of the electron temperature profile on the Tokamak Fusion Test Reactor

G. Taylor, P. C. Efthimion, M. McCarthy, E. Fredd, M. A. Goldman, D. Kaufman

Plasma Physics Lab

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Two fast scanning heterodyne receivers, swept between 75-110 and 110-170 GHz in 2 ms every 4 ms, were developed to measure the electron cyclotron emission on the horizontal midplane of the Tokamak Fusion Test Reactor (TFTR) plasma. An absolute, in situ calibration technique enables the determination of the profile of the plasma electron temperature from the fundamental ordinary mode and second harmonic extraordinary mode cyclotron emission intensity, with an accuracy of better than 10%. Temperature measurements made with the scanning receivers agree well with data from laser TV Thomson scattering and x-ray pulse-height analysis measurements. The time evolution of the temperature profile during temperature sawteeth fluctuations is well documented when the period of the fluctuation (30-100 ms) is much longer than the instrument sweep repetition time.

Original language	English (US)
Pages (from-to)	928-930
Number of pages	3
Journal	Review of Scientific Instruments
Volume	56
Issue number	5
DOIs	https://doi.org/10.1063/1.1138045
State	Published - 1985

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/1.1138045

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title = "Fast scanning heterodyne receiver for the measurement of the time evolution of the electron temperature profile on the Tokamak Fusion Test Reactor",

abstract = "Two fast scanning heterodyne receivers, swept between 75-110 and 110-170 GHz in 2 ms every 4 ms, were developed to measure the electron cyclotron emission on the horizontal midplane of the Tokamak Fusion Test Reactor (TFTR) plasma. An absolute, in situ calibration technique enables the determination of the profile of the plasma electron temperature from the fundamental ordinary mode and second harmonic extraordinary mode cyclotron emission intensity, with an accuracy of better than 10\%. Temperature measurements made with the scanning receivers agree well with data from laser TV Thomson scattering and x-ray pulse-height analysis measurements. The time evolution of the temperature profile during temperature sawteeth fluctuations is well documented when the period of the fluctuation (30-100 ms) is much longer than the instrument sweep repetition time.",

author = "G. Taylor and Efthimion, \{P. C.\} and M. McCarthy and E. Fredd and Goldman, \{M. A.\} and D. Kaufman",

year = "1985",

doi = "10.1063/1.1138045",

language = "English (US)",

volume = "56",

pages = "928--930",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Fast scanning heterodyne receiver for the measurement of the time evolution of the electron temperature profile on the Tokamak Fusion Test Reactor

AU - Taylor, G.

AU - Efthimion, P. C.

AU - McCarthy, M.

AU - Fredd, E.

AU - Goldman, M. A.

AU - Kaufman, D.

PY - 1985

Y1 - 1985

N2 - Two fast scanning heterodyne receivers, swept between 75-110 and 110-170 GHz in 2 ms every 4 ms, were developed to measure the electron cyclotron emission on the horizontal midplane of the Tokamak Fusion Test Reactor (TFTR) plasma. An absolute, in situ calibration technique enables the determination of the profile of the plasma electron temperature from the fundamental ordinary mode and second harmonic extraordinary mode cyclotron emission intensity, with an accuracy of better than 10%. Temperature measurements made with the scanning receivers agree well with data from laser TV Thomson scattering and x-ray pulse-height analysis measurements. The time evolution of the temperature profile during temperature sawteeth fluctuations is well documented when the period of the fluctuation (30-100 ms) is much longer than the instrument sweep repetition time.

AB - Two fast scanning heterodyne receivers, swept between 75-110 and 110-170 GHz in 2 ms every 4 ms, were developed to measure the electron cyclotron emission on the horizontal midplane of the Tokamak Fusion Test Reactor (TFTR) plasma. An absolute, in situ calibration technique enables the determination of the profile of the plasma electron temperature from the fundamental ordinary mode and second harmonic extraordinary mode cyclotron emission intensity, with an accuracy of better than 10%. Temperature measurements made with the scanning receivers agree well with data from laser TV Thomson scattering and x-ray pulse-height analysis measurements. The time evolution of the temperature profile during temperature sawteeth fluctuations is well documented when the period of the fluctuation (30-100 ms) is much longer than the instrument sweep repetition time.

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JF - Review of Scientific Instruments

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Fast scanning heterodyne receiver for the measurement of the time evolution of the electron temperature profile on the Tokamak Fusion Test Reactor

Abstract

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