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Density Fluctuation Measurements Using FIR Interferometer on HL-2A Tokamak
- Source :
- Chinese Physics Letters. 25:2558-2561
- Publication Year :
- 2008
- Publisher :
- IOP Publishing, 2008.
-
Abstract
- Density fluctuations were first measured in the core region of HL-2A tokamak plasma using a newly developed multi-channel FIR interferometer system. In divertor ohmic discharges, we measured the radial density fluctuation levels of 5%, which increase to 10–20% during the appearance of MHD activity. Most of the power density in the density fluctuation spectrum is directly associated with m = 2 tearing modes. The fluctuation levels reduce to 1/3 and plasma confinement is improved during off-axis electron-cyclotron-resonance heating (ECRH).
Details
- ISSN :
- 17413540 and 0256307X
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- Chinese Physics Letters
- Accession number :
- edsair.doi...........ee3902a9ecdef74575344c04812ee366