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@ARTICLE{Jaspers:45676,
author = {Jaspers, R. and Elzendoorn, B. S. Q. and Donne, A. J. H.
and Soetens, T.},
title = {{S}pectra polarimetry of the motional stark effect at
{TEXTOR}-94},
journal = {Review of scientific instruments},
volume = {72},
issn = {0034-6748},
address = {[S.l.]},
publisher = {American Institute of Physics},
reportid = {PreJuSER-45676},
pages = {1018 - 1022},
year = {2001},
note = {Record converted from VDB: 12.11.2012},
abstract = {The Balmer-alpha light emitted by neutral particles
injected into tokamaks is polarized with respect to the
Lorentz electric field experienced by these atoms: E-l = nu
xB, known as the motional Stark effect (MSE). On TEXTOR-94 a
new MSE system is under development which exploits the full
spectral information, along with its polarization. The
advantages of exploiting the full spectral information are
obvious: beam velocity, observation volume, absolute value
of B, the plasma radial electric field and the beam density
can in principle all be extracted from the measurement,
whereas the polarization can be detected as several lines
simultaneously. The TEXTOR-94 MSE system consists of 30
radial channel, of which the full Balmer-alpha spectrum is
measured at two orthogonal angles. This is accomplished by
inserting a Glan-Laser prism in the optical path. All the
optics is located inside the vessel to improve the radial
resolution and minimize changes in polarization due to
optical elements. Fibers transfer the light by a vacuum
feedthrough towards a spectrometer. It is shown that the
measured spectra can be adequately fitted. The accuracy for
determining the safety factor q is estimated to be
$10\%-15\%$ and for the radial electric field to be 30 kV/m.
(C) 2001 American Institute of Physics.},
keywords = {J (WoSType)},
cin = {IPP},
ddc = {530},
cid = {I:(DE-Juel1)VDB181},
pnm = {TEC-FOM},
pid = {G:(DE-Juel1)FUEK201},
shelfmark = {Instruments $\&$ Instrumentation / Physics, Applied},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000166141600165},
doi = {10.1063/1.1319611},
url = {https://juser.fz-juelich.de/record/45676},
}