Effect of Deuterium Gas Puff On The Edge Plasma In NSTX

Technical Report · Thu Feb 20 04:00:00 EST 2014

DOI:https://doi.org/10.2172/1129011· OSTI ID:1129011

Zweben, S. J. ^[1]; Stotler, D. P. ^[1]; Bell, R. E. ^[1]; Davis, W. M. ^[1]; Kaye, S. M. ^[1]; Meier, E. T. ^[2]; Munsat, T. ^[3]; LeBlanc, B. P. ^[1]; Maqueda, R. J. ^[4]; Ren, Y. ^[1]; Sechrest, Y. ^[1]; Smith, D. R. ^[5]; Soukhanovskii, V. ^[2]

---

1. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
2. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
3. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); University of Colorado, Boulder, CO (United States)
4. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); X Science LLC, Princeton NJ (United States)
5. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); University of Wisconsin, Madison WI (United States)

This paper describes a detailed examination of the effects of a relatively small pulsed deuterium gas puff on the edge plasma and edge turbulence in NSTX. This gas puff caused little or no change in the line-averaged plasma density or total stored energy, or in the edge density and electron temperature up to the time of the peak of the gas puff. The radial profile of the Dα light emission and the edge turbulence within this gas puff did not vary significantly over its rise and fall, implying that these gas puffs did not significantly perturb the local edge plasma or edge turbulence. These measurements are compared with modeling by DEGAS 2, UEDGE, and with simplified estimates for the expected effects of this gas puff.

• Research Organization: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• OSTI ID: 1129011
• Report Number(s): PPPL--4999
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Diagnostics
Tokamaks
Turbulence