Measurements of Electron Thermal Transport due to Electron Temperature Gradient Modes in a Basic Experiment

Journal Article · Fri Oct 07 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.107.155001· OSTI ID:21612155

Sokolov, V; Sen, A K ^[1]

---

1. Plasma Research Laboratory, Columbia University, New York, New York 10027 (United States)

Production and identification of electron temperature gradient modes have already been reported [X. Wei, V. Sokolov, and A. K. Sen, Phys. Plasmas 17, 042108 (2010)]. Now a measurement of electron thermal conductivity via a unique high frequency triple probe yielded a value of {chi}{sub perpendiculare} ranging between 2 and 10 m{sup 2}/s, which is of the order of a several gyrobohm diffusion coefficient. This experimental result appears to agree with a value of nonlocal thermal conductivity obtained from a rough theoretical estimation and not inconsistent with gyrokinetic simulation results for tokamaks. The first experimental scaling of the thermal conductivity versus the amplitude of the electron temperature gradient fluctuation is also obtained. It is approximately linear, indicating a strong turbulence signature.

• OSTI ID: 21612155
• Journal Information: Physical Review Letters, Vol. 107, Issue 15; Other Information: DOI: 10.1103/PhysRevLett.107.155001; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED-PARTICLE TRANSPORT
ELECTRON TEMPERATURE
ELECTRONS
FLUCTUATIONS
PLASMA
SIMULATION
TEMPERATURE GRADIENTS
THERMAL CONDUCTIVITY
TOKAMAK DEVICES
TURBULENCE
CLOSED PLASMA DEVICES
ELEMENTARY PARTICLES
FERMIONS
LEPTONS
PHYSICAL PROPERTIES
RADIATION TRANSPORT
THERMODYNAMIC PROPERTIES
THERMONUCLEAR DEVICES
VARIATIONS