A high etendue spectrometer suitable for core charge eXchange recombination spectroscopy on ITER

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 1mm(2)sr to comply with the measurement requirements [S. Tugarinov et al., Rev. Sci. Instrum. 74, 2075 (2003...

Full description

Saved in:
Bibliographic Details
Published in:Review of scientific instruments 2012-10, Vol.83 (10), p.10D515-10D515
Main Authors: Jaspers, R J E, Scheffer, M, Kappatou, A, van der Valk, N C J, Durkut, M, Snijders, B, Marchuk, O, Biel, W, Pokol, G I, Erdei, G, Zoletnik, S, Dunai, D
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Ashes
BEAMS
Beams (radiation)
CALIBRATION
CHARGE EXCHANGE
DISPERSIONS
DOPPLER EFFECT
EFFICIENCY
EMISSION
FEASIBILITY STUDIES
HELIUM
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ITER TOKAMAK
MAGNETOHYDRODYNAMICS
PLASMA DIAGNOSTICS
RECOMBINATION
RESOLUTION
SPECTROMETERS
SPECTROSCOPY
Wavelengths
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 1mm(2)sr to comply with the measurement requirements [S. Tugarinov et al., Rev. Sci. Instrum. 74, 2075 (2003)]. 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.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4732058