A feasibility study for the use of core charge exchange recombination spectroscopy on ITER has shown that accurate measurements on the helium ash require a spectrometer with a high etendue of 1mm2sr to comply with the measurement requirements [S. Tugarinov et al., Rev. Sci. Instrum. 74, 2075 (2003)] https://doi.org/10.1063/1.1537443. To this purpose such an instrument has been developed consisting of three separate wavelength channels (to measure simultaneously He/Be, C/Ne, and H/D/T together with the Doppler shifted direct emission of the diagnostic neutral beam, the beam emission (BES) signal), combining high dispersion (0.02 nm/pixel), sufficient resolution (0.2 nm), high efficiency (55%), and extended wavelength range (14 nm) at high etendue. The combined measurement of the BES along the same sightline within a third wavelength range provides the possibility for in situ calibration of the charge eXchange recombination spectroscopy signals. In addition, the option is included to use the same instrument for measurements of the fast fluctuations of the beam emission intensity up to 2 MHz, with the aim to study MHD activity.
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October 2012
Research Article|
July 16 2012
A high etendue spectrometer suitable for core charge eXchange recombination spectroscopy on ITERa)
R. J. E. Jaspers;
1Science and Technology of Nuclear Fusion,
Eindhoven University of Technology
, Eindhoven, The Netherlands
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M. Scheffer;
M. Scheffer
1Science and Technology of Nuclear Fusion,
Eindhoven University of Technology
, Eindhoven, The Netherlands
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A. Kappatou;
A. Kappatou
2FOM Institute DIFFER – Dutch Institute for Fundamental Energy Research,
Association EURATOM-FOM
, Nieuwegein, The Netherlands
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N. C. J. van der Valk;
N. C. J. van der Valk
3
TNO Science & Industry
, P.O. Box 155, 2600 AD Delft, The Netherlands
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M. Durkut;
M. Durkut
3
TNO Science & Industry
, P.O. Box 155, 2600 AD Delft, The Netherlands
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B. Snijders;
B. Snijders
3
TNO Science & Industry
, P.O. Box 155, 2600 AD Delft, The Netherlands
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O. Marchuk;
O. Marchuk
4
Institut für Energie und Klimaforschung-IEK-4 Forschungszentrum
, Jülich GmbH, 52425 Jülich, Germany
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W. Biel;
W. Biel
4
Institut für Energie und Klimaforschung-IEK-4 Forschungszentrum
, Jülich GmbH, 52425 Jülich, Germany
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G. I. Pokol;
G. I. Pokol
5Institute of Nuclear Techniques,
Budapest University of Technology and Economics
, EURATOM Association, P. O. Box 91, H-1521 Budapest, Hungary
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G. Erdei;
G. Erdei
6Department of Atomic Physics,
Budapest University of Technology and Economics
, EURATOM Association, P. O. Box 91, H-1521 Budapest, Hungary
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S. Zoletnik;
S. Zoletnik
7WIGNER RCP, RMKI,
EURATOM Association
, P. O. Box 91, H-1521 Budapest, Hungary
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D. Dunai
D. Dunai
7WIGNER RCP, RMKI,
EURATOM Association
, P. O. Box 91, H-1521 Budapest, Hungary
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b)
Author to whom correspondence should be addressed. Electronic mail: r.j.e.jaspers@tue.nl. URL: http://www.phys.tue.nl/fusion/.
a)
Contributed paper, published as part of the Proceedings of the 19th Topical Conference on High-Temperature Plasma Diagnostics, Monterey, California, May 2012.
Rev. Sci. Instrum. 83, 10D515 (2012)
Article history
Received:
May 06 2012
Accepted:
June 06 2012
Citation
R. J. E. Jaspers, M. Scheffer, A. Kappatou, N. C. J. van der Valk, M. Durkut, B. Snijders, O. Marchuk, W. Biel, G. I. Pokol, G. Erdei, S. Zoletnik, D. Dunai; A high etendue spectrometer suitable for core charge eXchange recombination spectroscopy on ITER. Rev. Sci. Instrum. 1 October 2012; 83 (10): 10D515. https://doi.org/10.1063/1.4732058
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