Observation of quasi-coherent edge fluctuations in Ohmic plasmas on NSTX
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
A quasi-coherent mode with frequency f = 40 kHz is observed in Ohmic plasmas in NSTX with the gas puff imaging diagnostic (GPI). This mode is located predominantly just inside the separatrix, with a maximum fluctuation amplitude similar to that of the broadband turbulence in the same frequency range. The quasi-coherent mode has a poloidal wavelength 16 cm and a poloidal velocity 49 km/s in the electron diamagnetic direction, which are similar to the characteristics expected from a linear drift-wave like mode in the edge.
- Research Organization:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- DOE Contract Number:
- AC02-09CH11466
- OSTI ID:
- 1366985
- Resource Relation:
- Related Information: Physics of Plasmas, vol. 23, p. 044502, April 2016
- Country of Publication:
- United States
- Language:
- English
Observation of quasi-coherent edge fluctuations in Ohmic plasmas on National Spherical Torus Experiment
|
journal | April 2016 |
Observation of quasi-coherent edge fluctuations in Ohmic plasmas on National Spherical Torus Experiment
|
journal | April 2016 |
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