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Title: A method of particle transport study using supersonic molecular beam injection and microwave reflectometry on HL-2A tokamak

Abstract

A method of the particle transport study using supersonic molecular beam injection (SMBI) and microwave reflectometry is reported in this paper. Experimental results confirm that pulsed SMBI is a good perturbation source with deeper penetration and better localization than the standard gas puffing. The local density modulation is induced using the pulsed SMBI and the perturbation density is measured by the microwave reflectometry. Using Fourier transform analysis for the local density perturbation, radial profiles of the amplitude and phase of the density modulation can be obtained. The experimental results in HL-2A show that the particle injected by SMBI is located at about r/a=0.65-0.75. The position of the main particle source can be determined through three aspects: the minimum of the phase of the first harmonic of the Fourier transform of the modulated density measured by microwave reflectometry; the H{sub a} intensity profile and the local density increase ratio. The maximum of the amplitude of the first harmonic shifts often inward relative to the particle source location, which indicates clearly there is an inward particle pinch in this area. Good agreement has been found between the experimental results and the simulation using analytical transport model. The particle diffusivity D and themore » particle convection velocity V have been obtained by doing this simulation. The sensitivity in the transport coefficients of the amplitude and the phase of the density modulation has been discussed.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;  [1]; ;  [2]
  1. Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041 (China)
  2. CEA, IRFM, F-13108 Saint-Paul-lez-Durance (France)
Publication Date:
OSTI Identifier:
22053620
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 81; Journal Issue: 1; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; BEAM INJECTION; FOURIER TRANSFORMATION; HL-2A TOKAMAK; MICROWAVE RADIATION; MODULATION; MOLECULAR BEAMS; NEUTRAL-PARTICLE TRANSPORT; PARTICLE SOURCES; REFLECTION; SENSITIVITY; SIMULATION; TRANSPORT THEORY

Citation Formats

Xiao, W W, Ding, X T, Dong, J Q, Yao, L H, Liu, Z T, Gao, Y D, Feng, B B, Song, X M, Yang, Q W, Yan, L W, Liu, Yi, Duan, X R, Pan, C H, Yong, Liu, Zou, X L, and Song, S D. A method of particle transport study using supersonic molecular beam injection and microwave reflectometry on HL-2A tokamak. United States: N. p., 2010. Web. doi:10.1063/1.3274201.
Xiao, W W, Ding, X T, Dong, J Q, Yao, L H, Liu, Z T, Gao, Y D, Feng, B B, Song, X M, Yang, Q W, Yan, L W, Liu, Yi, Duan, X R, Pan, C H, Yong, Liu, Zou, X L, & Song, S D. A method of particle transport study using supersonic molecular beam injection and microwave reflectometry on HL-2A tokamak. United States. https://doi.org/10.1063/1.3274201
Xiao, W W, Ding, X T, Dong, J Q, Yao, L H, Liu, Z T, Gao, Y D, Feng, B B, Song, X M, Yang, Q W, Yan, L W, Liu, Yi, Duan, X R, Pan, C H, Yong, Liu, Zou, X L, and Song, S D. 2010. "A method of particle transport study using supersonic molecular beam injection and microwave reflectometry on HL-2A tokamak". United States. https://doi.org/10.1063/1.3274201.
@article{osti_22053620,
title = {A method of particle transport study using supersonic molecular beam injection and microwave reflectometry on HL-2A tokamak},
author = {Xiao, W W and Ding, X T and Dong, J Q and Yao, L H and Liu, Z T and Gao, Y D and Feng, B B and Song, X M and Yang, Q W and Yan, L W and Liu, Yi and Duan, X R and Pan, C H and Yong, Liu and Zou, X L and Song, S D},
abstractNote = {A method of the particle transport study using supersonic molecular beam injection (SMBI) and microwave reflectometry is reported in this paper. Experimental results confirm that pulsed SMBI is a good perturbation source with deeper penetration and better localization than the standard gas puffing. The local density modulation is induced using the pulsed SMBI and the perturbation density is measured by the microwave reflectometry. Using Fourier transform analysis for the local density perturbation, radial profiles of the amplitude and phase of the density modulation can be obtained. The experimental results in HL-2A show that the particle injected by SMBI is located at about r/a=0.65-0.75. The position of the main particle source can be determined through three aspects: the minimum of the phase of the first harmonic of the Fourier transform of the modulated density measured by microwave reflectometry; the H{sub a} intensity profile and the local density increase ratio. The maximum of the amplitude of the first harmonic shifts often inward relative to the particle source location, which indicates clearly there is an inward particle pinch in this area. Good agreement has been found between the experimental results and the simulation using analytical transport model. The particle diffusivity D and the particle convection velocity V have been obtained by doing this simulation. The sensitivity in the transport coefficients of the amplitude and the phase of the density modulation has been discussed.},
doi = {10.1063/1.3274201},
url = {https://www.osti.gov/biblio/22053620}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 1,
volume = 81,
place = {United States},
year = {Fri Jan 15 00:00:00 EST 2010},
month = {Fri Jan 15 00:00:00 EST 2010}
}