초록

-본 보고서는 총괄보고서임
-제1세부는 KSTAR 톰슨산란장치 성능 개선을 위해 전자 계측장비 및 데이터 분석 알고리즘 개선 연구 진행
-제2세부는 같은 목적을 달성하기 위해 레이저 다중 왕복 방법 및 광학계 개선 연구 진행

( 출처 : 보고서 요약서 3p )

Abstract ▼

Purpose & Contents
The current KSTAR Thomson Scattering(TS) system is not capable of providing accurate or reliable electron information. Our collaborative research will provide high quality electron density/temperature by improving techniques of inducing, collecting and utilizing Thomson scatter

Purpose & Contents
The current KSTAR Thomson Scattering(TS) system is not capable of providing accurate or reliable electron information. Our collaborative research will provide high quality electron density/temperature by improving techniques of inducing, collecting and utilizing Thomson scattered lights with innovative new schemes such as:
■ Improve performance of collection device and digitizer for better signal processing(1^st group)
■ Add in-situ alignment system to suppress photon losses (1^st group)
■ Develop amplified laser pulses with a new multi-pass scheme to increase S/N (2^nd group)
■ Improve the collection efficiency between collection optics and the fiber bundle(2^nd group)
■ Develop signal synchronizing technique for better signal processing to improve S/N(collaboration)

Results
■ Noise sources of the KSTAR TS system and their levels are quantitatively determined
■ Effective photon counts detected by the KSTAR TS system are estimated
■ Forward model of the KSTAR TS system is developed
■ The laser system of the KSTAR TS system is changed
○ New algorithm to fit the laser pulse shape is developed with the low-pass filter type integration to accommodate the modified laser pulse shape
○ Algorithm to determine electron density and temperature is developed, especially the algorithm to infer the system constant required for electron density measurements
■ GUI development has begun
■ Required polychromator specification is determined based on the forward model of the KSTAR TS system
○ Obtained polychromator hardware system
○ The new idea of In-situ horizontal alignment system is incorporated into the new polychromator design
■ In-situ vertical alignment system is commissioned
■ Reliable data server system is constructed to save all the TS data measured by the fast sampling digitizer
■ Currently six spatial positions are measured by the fast sampling digitizer
■ Developed and tested the TS optical system using multi-pass scheme with faraday rotator
■ Developed a way to measure two near spatial positions using the multi-pass scheme without faraday rotator
■ Verified to show over 90% noise reduction is possible using the multi-pass scheme
■ Expect to remove the stray light from the KSTAR TS system
■ Increased photon collection efficiency using the CPC, thereby expect to improve the SNR.
■ A multi-pass optical resonator system which can be used for TS measurements in the VEST is designed, fabricated, and tested.

Expected Contribution
■ The developed algorithm can be used for KSTAR TS data analysis
■ Integrated data analysis routine for TS system, interferometer and Li-BES can be used for KSTAR to obtain electron density and temperature
■ Our algorithm can be used to develop a spectrometer based TS system in the future
■ Our newly proposed scheme can provide much higher S/N for TS measurements than the conventional TS measurement scheme.
■ The proposed system can be commercialized and can give a significant impact on the related industries.

( 출처 : SUMMARY 5p )

목차 Contents

• 표지 ... 1
• 제 출 문 ... 2
• 보고서 요약서 ... 3
• 요약문 ... 4
• SUMMARY ... 5
• 목차 ... 6
• 1. 연구 개발 과제의 개요 ... 7
• 1-1. 연구 개발 목적 ... 7
• 1-2. 연구 개발의 필요성 ... 7
• 1-3. 연구 개발 범위 ... 8
• 2. 국내외 기술 개발 현황 ... 10
• 3. 연구 수행 내용 및 결과 ... 12
• 4. 목표 달성도 및 관련 분야 기여도 ... 12
• 5. 연구 결과의 활용 계획 ... 18
• 6. 연구 과정에서 수집한 해외 과학 기술 정보 ... 19
• 7. 연구 개발 결과의 보안 등급 ... 19
• 8. 국가과학기술종합정보시스템에 등록한 연구 시설·장비 현황 ... 20
• 9. 연구 개발 과제 수행에 따른 연구실 등의 안전 조치 이행 실적 ... 20
• 10. 연구 개발 과제의 대표적 연구 실적 ... 20
• 11. 기타 사항 ... 21
• 12. 참고 문헌 ... 21
• 끝페이지 ... 22