Short-Scale Turbulent Fluctuations Driven by the Electron-Temperature Gradient in the National Spherical Torus Experiment

Journal Article · Fri Aug 15 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.075001· OSTI ID:21134138

Mazzucato, E; Smith, D R; Bell, R E; Kaye, S M; Hosea, J C; LeBlanc, B P; Wilson, J R ^[1]; Ryan, P M ^[2]; Domier, C W; Luhmann, Jr, N C ^[3]; Yuh, H ^[4]; Lee, W; Park, H ^[5]

---

1. Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (United States)
2. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
3. University of California at Davis, Davis, California 95616 (United States)
4. Nova Photonics Inc., Princeton, New Jersey 08540 (United States)
5. Department of Physics, POSTECH, Pohang 790-784 (Korea, Republic of)

Measurements with coherent scattering of electromagnetic waves in plasmas of the National Spherical Torus Experiment indicate the existence of turbulent fluctuations in the range of wave numbers k{sub perpendicular}{rho}{sub e}=0.1-0.4, corresponding to a turbulence scale length nearly equal to the collisionless skin depth. Experimental observations and agreement with numerical results from a linear gyrokinetic stability code support the conjecture that the observed turbulence is driven by the electron-temperature gradient.

• OSTI ID: 21134138
• Journal Information: Physical Review Letters, Vol. 101, Issue 7; Other Information: DOI: 10.1103/PhysRevLett.101.075001; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COHERENT SCATTERING
ELECTROMAGNETIC RADIATION
ELECTRON TEMPERATURE
FLUCTUATIONS
PLASMA
PLASMA WAVES
SPHERICAL CONFIGURATION
TEMPERATURE GRADIENTS
TURBULENCE