Observation of a Spontaneous Particle-Transport Barrier in the HL-2A Tokamak

Journal Article · Fri May 28 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.215001· OSTI ID:21410702

Xiao, W W; Ding, X T; Yao, L H; Feng, B B; Song, X M; Zhou, Y; Liu, Z T; Yuan, B S; Sun, H J; Ji, X Q; Gao, Y D; Li, Y G; Yan, L W; Yang, Q W; Liu, Yi; Dong, J Q; Duan, X R; Liu, Yong; Pan, C H ^[1]; Zou, X L ^[2]

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1. Southwestern Institute of Physics, P.O. Box 432, Chengdu (China)
2. CEA, IRFM, F-13108 Saint-Paul-lez-Durance (France)

Using the profile analysis, the density perturbation transport analysis, and the Doppler reflectometry measurement, for the first time a spontaneous and steady-state particle-transport barrier has been evidenced in the Ohmic plasmas in the HL-2A tokamak with no externally applied momentum or particle input except the gas puffing. A threshold in density has been found for the observation of the barrier. The particle diffusivity is well-like, and the convection is found to be inward outside the well and outward inside the well. The formation of the barrier coincides with the transition between the trapped electron mode and the ion temperature gradient driven mode.

• OSTI ID: 21410702
• Journal Information: Physical Review Letters, Vol. 104, Issue 21; Other Information: DOI: 10.1103/PhysRevLett.104.215001; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CONVECTION
DENSITY
DISTURBANCES
HL-2A TOKAMAK
ION TEMPERATURE
NEUTRAL-PARTICLE TRANSPORT
PERTURBATION THEORY
PLASMA
STEADY-STATE CONDITIONS
TEMPERATURE GRADIENTS
TRAPPED ELECTRONS
CLOSED PLASMA DEVICES
ELECTRONS
ELEMENTARY PARTICLES
ENERGY TRANSFER
FERMIONS
HEAT TRANSFER
LEPTONS
MASS TRANSFER
PHYSICAL PROPERTIES
RADIATION TRANSPORT
THERMONUCLEAR DEVICES
TOKAMAK DEVICES