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Title: Gas Puff Imaging Diagnostics of Edge Plasma Turbulence in Magnetic Fusion Devices
Contributors: Zweben, S.J.
Terry, J.L.
Stotler, D.P.
Maqueda, R.J.
U. S. Department of Energy contract number DE-AC02-09CH11466
Keywords: Gas puff imaging
Issue Date: Apr-2017
Publisher: Princeton Plasma Physics Laboratory, Princeton University
Related Publication: Review of Scientific Instruments, vol. 88, P. 041101 (April 2017)
Abstract: Gas puff imaging (GPI) is a diagnostic of plasma turbulence which uses a puff of neutral gas at the plasma edge to increase the local visible light emission for improved space-time resolution of plasma fluctuations. This paper reviews gas puff imaging diagnostics of edge plasma turbulence in magnetic fusion research, with a focus on the instrumentation, diagnostic cross-checks, and interpretation issues. The gas puff imaging hardware, optics, and detectors are described for about 10 GPI systems implemented over the past ~15 years. Comparison of GPI results with other edge turbulence diagnostic results are described and many common features are observed. Several issues in the interpretation of GPI measurements are discussed, and potential improvements in hardware and modeling are suggested.
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