Conceptual design of new polychromator on Thomson scattering system to measure Z{sub eff}

Journal Article · Mon Oct 15 00:00:00 EDT 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4733737· OSTI ID:22093937

Lee, Jongha; Oh, Seungtae; Wi, Hanmin; Oh, Youngkook ^[1]; Yamada, I.; Narihara, K.; Kawahata, K. ^[2]; Jeon, Jongsu ^[3]

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1. National Fusion Research Institute, 169-148 Gwahangno, Yuseunggu, Daejeon (Korea, Republic of)
2. National Institute of Fusion Science, 322-6 Oroshi-cho, Toki 509-5292 (Japan)
3. YoonSeul Co. Ltd., 326-55 Sangseodong, Daeduckgu, Daejeon (Korea, Republic of)

To measure the Z{sub eff} with electron temperature (T{sub e}) and electron density (n{sub e}) profiles at the same time and the same position in the KSTAR tokamak, we design a new polychromator for Thomson scattering system that has additional function. The additional function is measuring bremsstrahlung intensity to calculate Z{sub eff} independent of Thomson signals. For this new polychromator, we design and fabricate a collimation lens set, and interference filter that has center wavelength of 523 nm and 2 nm FWHM. Finally, we change the lenses, detector diodes, and add the bremsstrahlung filter on the KSTAR edge Thomson scattering polychromator. Then this new polychromator was tested by Tungsten light and monochromator.

• OSTI ID: 22093937
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 10; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BREMSSTRAHLUNG
CONFINEMENT
DESIGN
ELECTRON DENSITY
ELECTRON TEMPERATURE
INTERFERENCE
ION TEMPERATURE
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
THOMSON SCATTERING
TOKAMAK DEVICES
WAVELENGTHS