Published July 3, 2009 | Version v1
Journal article Metadata-only

Collisional Damping of Electron Bernstein Waves and its Mitigation by Evaporated Lithium Conditioning in Spherical-Tokamak Plasmas

Creators

  • 1. Oak Ridge National Laboratory, Oak Ridge 37831, Tennessee (United States)
  • 2. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
  • 3. EURATOM/IPP.CR Association, Institute of Plasma Physics, 18200 Prague 8 (Czech Republic)
  • 4. Columbia University, New York, New York 10027 (United States)

Description

The first experimental verification of electron Bernstein wave (EBW) collisional damping, and its mitigation by evaporated Li conditioning, in an overdense spherical-tokamak plasma has been observed in the National Spherical Torus Experiment (NSTX). Initial measurements of EBW emission, coupled from NSTX plasmas via double-mode conversion to O-mode waves, exhibited <10% transmission efficiencies. Simulations show 80% of the EBW energy is dissipated by collisions in the edge plasma. Li conditioning reduced the edge collision frequency by a factor of 3 and increased the fundamental EBW transmission to 60%.

Additional details

Identifiers

DOI
10.1103/PhysRevLett.103.015002;

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
103
Journal Issue
1
Journal Page Range
p. 015002-015002.4
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
41078221
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
BERNSTEIN MODE; ELECTRONS; EMISSION; LITHIUM; MODE CONVERSION; NSTX DEVICE; PLASMA; PLASMA WAVES; SIMULATION; SPHERICAL CONFIGURATION
Descriptors DEC
ALKALI METALS; CLOSED PLASMA DEVICES; CONFIGURATION; ELEMENTARY PARTICLES; ELEMENTS; FERMIONS; LEPTONS; METALS; OSCILLATION MODES; SPHEROMAK DEVICES; THERMONUCLEAR DEVICES; TOKAMAK DEVICES

Optional Information

Notes
(c) 2009 The American Physical Society