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Spectral Multiplexing on the HSX Thomson Scattering Diagnostic
Spectral Multiplexing on the HSX Thomson Scattering Diagnostic
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151458
- ISBN
- 9798382591759
- DDC
- 530
- 저자명
- Goodman, Wayne.
- 서명/저자
- Spectral Multiplexing on the HSX Thomson Scattering Diagnostic
- 발행사항
- [Sl] : The University of Wisconsin - Madison, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 161 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
- 주기사항
- Advisor: Geiger, Benedikt.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
- 초록/해제
- 요약Thomson scattering is a fundamental diagnostic tool in high-temperature plasma experiments, providing crucial measurements of electron temperature and density profiles. The operation of Thomson scattering diagnostics involves the propagation of an intense radiation beam through an ionized plasma, with the scattered light from free electrons within the plasma being analyzed. The spectral content of this scattered light contains information on the temperature and density of the plasma under observation. In this work, sources of error are derived and deconstructed for a Thomson scattering system, focusing on three key factors that influence measurement uncertainty: the number of primary photoelectrons generated per pulse, the uncertainty arising from the non-ideal nature of the physical detection apparatus, and the analysis routine's ability to converge on a correct solution.Meticulous examination of these error terms has led to a significant redesign of the Thomson Scattering system at the Helically Symmetric eXperiment (HSX). This redesign, aimed at reducing noise susceptibility while increasing system bandwidth and gain, has involved electronic upgrades and the development of a new signal analysis routine. Results from testing are promising, showing that the redesigned detection electronics and analysis routine have significantly decreased measurement errors compared to the previous diagnostic setup. This work goes beyond systematic improvements, focusing on enhancing the quality and content of measured data without increasing the required number of spectral channels, leading to the development of a novel spectral analysis technique, Thomson Scattering Spectral Multiplexing (TSSM). In a standard Thomson scattering diagnostic, scattered light is divided into wide spectral bands by a filter polychromator equipped with three to eight single bandpass filters. TSSM leverages advanced filters with multiple spectral bands to efficiently utilize Thomson scattered spectra. The results of implementing two TSSM filter sets on the HSX Thomson scattering diagnostic show a reduction in measurement uncertainty and an increased range of electron temperature measurements compared to a filter set with an equivalent number of spectral channels. As a result of this work, the Thomson scattering diagnostic on HSX is now performing at a previously thought unachievable level.
- 일반주제명
- Plasma physics
- 일반주제명
- Electrical engineering
- 일반주제명
- Computer engineering
- 키워드
- Polychromator
- 기타저자
- The University of Wisconsin - Madison Electrical and Computer Engineering
- 기본자료저록
- Dissertations Abstracts International. 85-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211151458
■006m o d
■007cr#unu||||||||
■020 ▼a9798382591759
■035 ▼a(MiAaPQ)AAI31297463
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aGoodman, Wayne.
■24510▼aSpectral Multiplexing on the HSX Thomson Scattering Diagnostic
■260 ▼a[Sl]▼bThe University of Wisconsin - Madison▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a161 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-11, Section: B.
■500 ▼aAdvisor: Geiger, Benedikt.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
■520 ▼aThomson scattering is a fundamental diagnostic tool in high-temperature plasma experiments, providing crucial measurements of electron temperature and density profiles. The operation of Thomson scattering diagnostics involves the propagation of an intense radiation beam through an ionized plasma, with the scattered light from free electrons within the plasma being analyzed. The spectral content of this scattered light contains information on the temperature and density of the plasma under observation. In this work, sources of error are derived and deconstructed for a Thomson scattering system, focusing on three key factors that influence measurement uncertainty: the number of primary photoelectrons generated per pulse, the uncertainty arising from the non-ideal nature of the physical detection apparatus, and the analysis routine's ability to converge on a correct solution.Meticulous examination of these error terms has led to a significant redesign of the Thomson Scattering system at the Helically Symmetric eXperiment (HSX). This redesign, aimed at reducing noise susceptibility while increasing system bandwidth and gain, has involved electronic upgrades and the development of a new signal analysis routine. Results from testing are promising, showing that the redesigned detection electronics and analysis routine have significantly decreased measurement errors compared to the previous diagnostic setup. This work goes beyond systematic improvements, focusing on enhancing the quality and content of measured data without increasing the required number of spectral channels, leading to the development of a novel spectral analysis technique, Thomson Scattering Spectral Multiplexing (TSSM). In a standard Thomson scattering diagnostic, scattered light is divided into wide spectral bands by a filter polychromator equipped with three to eight single bandpass filters. TSSM leverages advanced filters with multiple spectral bands to efficiently utilize Thomson scattered spectra. The results of implementing two TSSM filter sets on the HSX Thomson scattering diagnostic show a reduction in measurement uncertainty and an increased range of electron temperature measurements compared to a filter set with an equivalent number of spectral channels. As a result of this work, the Thomson scattering diagnostic on HSX is now performing at a previously thought unachievable level.
■590 ▼aSchool code: 0262.
■650 4▼aPlasma physics
■650 4▼aElectrical engineering
■650 4▼aComputer engineering
■653 ▼aPlasma diagnostics
■653 ▼aPolychromator
■653 ▼aThomson scattering
■653 ▼aHelically Symmetric eXperiment
■690 ▼a0759
■690 ▼a0544
■690 ▼a0464
■71020▼aThe University of Wisconsin - Madison▼bElectrical and Computer Engineering.
■7730 ▼tDissertations Abstracts International▼g85-11B.
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161889▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


