Observation of blobs using gas puff imaging diagnostic on HL-2A tokamak

Jinbang YUAN; Boda YUAN; Min XU; Yi YU; Lin NIE; Rui KE; Zhanhui WANG; Shaobo GONG; Ting WU; Yifan WU; Ting LONG; Huajie WANG; Hao LIU; Wei YUE

doi:10.1088/2058-6272/ab0b29

Plasma Science and Technology > 2019 > 21(8): 84002-084002. > DOI: 10.1088/2058-6272/ab0b29

Jinbang YUAN, Boda YUAN, Min XU, Yi YU, Lin NIE, Rui KE, Zhanhui WANG, Shaobo GONG, Ting WU, Yifan WU, Ting LONG, Huajie WANG, Hao LIU, Wei YUE. Observation of blobs using gas puff imaging diagnostic on HL-2A tokamak[J]. Plasma Science and Technology, 2019, 21(8): 84002-084002. DOI: 10.1088/2058-6272/ab0b29

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Observation of blobs using gas puff imaging diagnostic on HL-2A tokamak

Jinbang YUAN¹,
Boda YUAN^1,2,
Min XU^1, ,,
Yi YU²,
Lin NIE¹,
Rui KE¹,
Zhanhui WANG¹,
Shaobo GONG^1,2,
Ting WU¹,
Yifan WU^1,2,
Ting LONG¹,
Huajie WANG¹,
Hao LIU^1,2,
Wei YUE^1,2

1 Southwestern Institute of Physics, Chengdu 610041, People’s Republic of China
2 University of Science and Technology of China, Hefei 230026, People’s Republic of China

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Corresponding author:
Min XU E-mail: minxu@swip.ac.cn
Received Date: January 06, 2019
Revised Date: February 24, 2019

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Abstract

Abstract

A gas puff imaging (GPI) diagnostic has been developed and applied to measure edge plasma turbulence on HL-2A tokamak. The principle and experimental setup of GPI are described. GPI is applied to investigate blobs in the edge and scrape-off layer (SOL). Statistical characterizations of GPI line emission intensity are calculated, including the probability density functions (PDF), skewness and kurtosis of the intensity, which are found to be consistent with measurements by Langmuir probes. Besides, the track of blob motions is recorded by time sequence of individual frames. The characteristics of original images and the relatively high-frequency (>10 kHz)/low-frequency (1-10 kHz) components images are illustrated. The observation of blob’s structures and high-speed motions proves the success and high performance of the GPI diagnostic.
- gas puff imaging,
- statistical characterization,
- blob motions

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References (24)

References

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Observation of blobs using gas puff imaging diagnostic on HL-2A tokamak