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@ARTICLE{Divin:154254,
author = {Divin, Yuri and Pandya, H. K. B.},
title = {{F}easibility of {ECE} measurements using
{H}ilbert-transform spectral analysis},
journal = {Fusion science and technology},
volume = {65},
issn = {0748-1896},
address = {La Grange Park, Ill.},
publisher = {American Nuclear Society},
reportid = {FZJ-2014-03630},
pages = {399-405 3},
year = {2014},
abstract = {Electron cyclotron emission (ECE) from hot tokamak plasmas
is recognized nowadays as a very informative diagnostic of
main plasma parameters. Among several instruments developed
to measure ECE, only a Martin-Puplett interferometer
operates in a broadband frequency range of ECE from 70 to
1000 GHz. To derive the absolute radiation temperature of
the plasma, a total measurement system, including front-end
radiation collection, a transmission line, and the
interferometer, is calibrated using a hot/cold calibration
source. It takes a long time to calibrate the ECE system
because of the high values of the noise equivalent power
(NEP). A new technique, Hilbert-transform spectral analysis,
is proposed for ITER plasma ECE spectral measurements. The
operation principle, characteristics, and advantages of the
corresponding Hilbert-transform spectrum analyzer (HTSA)
based on a high-Tc Josephson detector are described. Because
of the lower NEP values of the Josephson detector, this
spectrum analyzer might demonstrate shorter calibration
times than those for the Martin-Puplett interferometer.
Because of a principal difference between Fourier and
Hilbert transforms, the HTSA might have an additional
advantage in retrieving harmonic ECE radiation from a
continuous thermal background.},
cin = {PGI-5},
ddc = {530},
cid = {I:(DE-Juel1)PGI-5-20110106},
pnm = {423 - Sensorics and bioinspired systems (POF2-423)},
pid = {G:(DE-HGF)POF2-423},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000336947200007},
url = {https://juser.fz-juelich.de/record/154254},
}