Toroidal inhomogeneity of plasma density fluctuations during ECR plasma heating in the L-2M stellarator
Journal Article
·
· Plasma Physics Reports
- Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)
Correlation between short-wavelength (k{sub ⊥} ≈ 20–30 cm{sup –1}) and long-wavelength (k{sub ⊥} ≈ 1–2 cm{sup –1}) plasma density fluctuations in two poloidal cross sections of the stellarator chamber separated by 1/14 or 5/14 of the torus perimeter was studied using collective scattering of radiation of two 75-GHz gyrotrons and radiation of a 37-GHz Doppler reflectometer at an ECR heating power density of 1.6–3.2 MW/m{sup 3}. It is found that excitation of turbulent fluctuations is bursty in character and that fluctuations excited in different L-2M cross sections are uncorrelated. It is shown that the energy of turbulent fluctuations is modulated by a low frequency of 5–20 kHz. An idea is put forward that anomalous transport is toroidally inhomogeneous.
- OSTI ID:
- 22760282
- Journal Information:
- Plasma Physics Reports, Journal Name: Plasma Physics Reports Journal Issue: 11 Vol. 43; ISSN PPHREM; ISSN 1063-780X
- Country of Publication:
- United States
- Language:
- English
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