Electron density profile measurements from hydrogen line intensity ratio method in Versatile Experimental Spherical Torus

Journal Article · Tue Nov 15 00:00:00 EST 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4960535· OSTI ID:22596408

Kim, YooSung; Shi, Yue-Jiang; Yang, Jeong-hun; Kim, SeongCheol; Kim, Young-Gi; Dang, Jeong-Jeung; Yang, Seongmoo; Jo, Jungmin; Chung, Kyoung-Jae ^[1]; Oh, Soo-Ghee ^[2]; Hwang, Y. S. ^[1]

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1. Department of Nuclear Engineering, Seoul National University, Seoul 151-744 (Korea, Republic of)
2. Division of Energy Systems Research, Ajou University, Suwon 442-749 (Korea, Republic of)

Electron density profiles of versatile experiment spherical torus plasmas are measured by using a hydrogen line intensity ratio method. A fast-frame visible camera with appropriate bandpass filters is used to detect images of Balmer line intensities. The unique optical system makes it possible to take images of H{sub α} and H{sub β} radiation simultaneously, with only one camera. The frame rate is 1000 fps and the spatial resolution of the system is about 0.5 cm. One-dimensional local emissivity profiles have been obtained from the toroidal line of sight with viewing dumps. An initial result for the electron density profile is presented and is in reasonable agreement with values measured by a triple Langmuir probe.

• OSTI ID: 22596408
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 11; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BALMER LINES
CAMERAS
ELECTRON DENSITY
EMISSIVITY
FILTERS
HYDROGEN
IMAGES
LANGMUIR PROBE
ONE-DIMENSIONAL CALCULATIONS
OPTICAL SYSTEMS
PLASMA
SOCIO-ECONOMIC FACTORS
SPATIAL RESOLUTION
SPHERICAL CONFIGURATION