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Ultrafast spectroscopy diagnostic to measure localized ion temperature and toroidal velocity fluctuations
Date
2010-10-01
Author
Uzun Kaymak, İlker Ümit
McKee, G. R.
Schoenbeck, N.
Smith, D.
Winz, G.
Yan, Z.
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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A dual-channel high-efficiency, high-throughput custom spectroscopic system has been designed and implemented at DIII-D to measure localized ion thermal fluctuations associated with drift wave turbulence. A large-area prism-coupled transmission grating and high-throughput collection optics are employed to observe C VI emission centered near lambda = 529 nm. The diagnostic achieves 0.25 nm resolution over a 2.0 nm spectral band via eight discrete spectral channels. A turbulence-relevant time resolution of 1 mu s is achieved using cooled high-speed avalanche photodiodes and ultralow-noise preamplifiers. The system sensitivity is designed to provide measurements of normalized ion temperature fluctuations on the order of delta T-i/T-i <= 1%. (C) 2010 American Institute of Physics. [doi:10.1063/1.3479114]
Subject Keywords
Instrumentation
URI
https://hdl.handle.net/11511/37992
Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
DOI
https://doi.org/10.1063/1.3479114
Collections
Department of Physics, Article
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İ. Ü. Uzun Kaymak, G. R. McKee, N. Schoenbeck, D. Smith, G. Winz, and Z. Yan, “Ultrafast spectroscopy diagnostic to measure localized ion temperature and toroidal velocity fluctuations,”
REVIEW OF SCIENTIFIC INSTRUMENTS
, pp. 0–0, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37992.