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KSTAR의 주 이온 온도와 토로이달 속도 측정을 위한 그리즘 광학계의 응용연구
- Author(s)
- 장유순
- Advisor
- 박지용
- Department
- 일반대학원 에너지시스템학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2017-02
- Language
- eng
- Alternative Abstract
- In 2015 KSTAR experimental campaign, the main ion spectral lines have been investigated under the framework of the development of main ion CES system. We were exposed to difficulties relating bright emission originating from plasma edge neutrals in KSTAR and handling overlapped complex spectra. We coped with the intense signals around Dα requiring extremely high dynamic range measurements by a genuine grism spectrometer system. At the exit of the spectrometer, the light is horizontally dispersed in wavelength. A vertical polarizing filter on the exit focal plane blocks the portion of the rest Dα spectrum. This blocked spectrum image, then, was focused onto the plane of CCD via a relay lens. Modulation of the neutral beam injection and time slice subtraction is used to eliminate the complicating features of complex spectral lines. The measured active charge-exchange signal can be fitted with two-Gaussian functions by means of a nonlinear least-squares fitting. We recognized preferentially information of shot number # 13103 in KSTAR plasma at 5.985 s such as plasma current (605 kA), plasma stored energy (186 kJ), and line averaged density (12.2ⅹ1019 m-3). From the fitted Gaussian function, the ion temperature and toroidal rotation velocity in the core plasma (r = 1,880 mm) are estimated to be 1.828 keV and 260.05 km/s.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Energy Systems > 3. Theses(Master)
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