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Zhang BY, Inagaki S, Shi ZB, Zhong WL, Zou XL, Jiang M, Yang ZC, Shi PW, Chen CY, Xiao GL, Feng BB, Song XM. Experimental study of perturbative particle transport in the HL-2A tokamak. Heliyon 2020; 6:e04633. [PMID: 32984569 DOI: 10.1016/j.heliyon.2020.e04633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 11/16/2019] [Accepted: 08/03/2020] [Indexed: 11/22/2022] Open
Abstract
Perturbative particle transport experiment has been performed in the HL-2A tokamak by using supersonic molecular beam injection (SMBI) as an external particle source. The spatiotemporal evolution of edge density perturbation is traced and the particle source and the flux-gradient relation are obtained experimentally. The flux-gradient relation is found to be far from the diffusive model and three different transport processes are revealed, including pinch-dominant process, diffusion-pinch process and intermittent decays.
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Li YG, Li Y, Zhou Y, Wang HX, Yi J, Cheng J, Yao K, Yu LM, Chen W, Deng ZC, Shi ZB, Liu Y, Yang QW. High-sensitivity far-forward collective scattering diagnostic on HL-2A tokamak. Rev Sci Instrum 2019; 90:053502. [PMID: 31153266 DOI: 10.1063/1.5082377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
The multichannel formic acid (HCOOH, λ = 432.5 µm) laser interferometer and Faraday-effect polarimeter on HL-2A tokamak have been developed to measure the far-forward collective scattering from electron density fluctuations. The far-forward collective scattering system provides eight channels of line-integrated electron density fluctuations, covering the wave-number range: k⊥ < 1.6 cm-1. With the new diagnostic, the density fluctuations caused by plasma energetic particles and turbulence have been routinely observed in HL-2A experiments.
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Affiliation(s)
- Y G Li
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - Y Li
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - Y Zhou
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - H X Wang
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - J Yi
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - J Cheng
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - K Yao
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - L M Yu
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - W Chen
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - Z C Deng
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - Z B Shi
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - Yi Liu
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - Q W Yang
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
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