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Multiple track Doppler-shift spectroscopy system for TFTR neutral beam injectors

Author
Kamperschroer, J. H.
Published
United States : [publisher not identified], 1986
Springfield, Va.: National Technical Information Service, [approximately 1986]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Hayes, S. L., Johnson, G. A., Kugel, H. W., Lowrance, J. L., Reale, M. A., Shah, P. A., Sichta, P., Sleaford, B. W., Williams, M. D., and Zucchino, P. M.

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Summary
A Doppler-shift spectroscopy system has been installed on the TFTR neutral beam injection system to measure species composition during both conditioning and injection pulses. Two intensified vidicon detectors and two spectrometers are utilized in a system capable of resolving data from up to twelve ion sources simultaneously. By imaging the light from six ion sources onto one detector, a cost-effective system has been achieved. Fiber optics are used to locate the diagnostic in an area remote from the hazards of the tokamak test cell allowing continuous access, and eliminating the need for radiation shielding of electronic components. Automatic hardware arming and interactive data analysis allow beam composition to be computed between tokamak shots for use in analyzing plasma heating experiments. Measurements have been made using lines of sight into both the neutralizer and the drift duct. Analysis of the data from the drift duct is both simpler and more accurate since only neutral particles are present in the beam at this location. Comparison of the data taken at these two locations reveals the presence of partially accelerated particles possessing an estimated 1/e half-angle divergence of 15/sup 0/ and accounting for up to 30% of the extracted power.
Report Numbers
DE87000665; PPPL-2381
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AC02-76CH03073
OSTI Identifier 5067479
Research organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States).
View MARC record | catkey: 47369979