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Studies for the Laser Preheating Stage of Magnetized Liner Inertial Fusion
Studies for the Laser Preheating Stage of Magnetized Liner Inertial Fusion
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152105
- ISBN
- 9798382740959
- DDC
- 539.76
- 서명/저자
- Studies for the Laser Preheating Stage of Magnetized Liner Inertial Fusion
- 발행사항
- [Sl] : University of Michigan, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 131 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
- 주기사항
- Advisor: Kuranz, Carolyn Christine;McBride, Ryan David.
- 학위논문주기
- Thesis (Ph.D.)--University of Michigan, 2024.
- 초록/해제
- 요약Magnetized Liner Inertial Fusion (MagLIF) is an approach to inertial confinement fusion being studied experimentally on the Z pulsed-power facility at Sandia National Laboratories (SNL). In MagLIF, a preheating laser enters a cylindrical target after passing through a laser entrance hole (LEH) window. The laser then heats the pressurized target fuel and sends shock waves through the fuel, towards the fuel-confining cylindrical metal shell (or "liner"). The shock waves are then transmitted into (and travel through) the liner wall. To scale MagLIF to higher fusion yield and ultimately reach ignition, the laser energy coupled to the fuel must be maximized. Additionally, the laser must not ablate target materials that could mix into and contaminate the fuel. Energy coupling and mix mitigation can be improved with a method of removing the LEH window called "Laser Gate." Presented in this dissertation is a successful proof-of-concept of the Laser Gate method for removing the LEH window. In our experimental tests, the LEH window was removed from the target and cleared from the laser path. The measured window opening time (from fast framing camera images) agrees well with estimates from a simple window opening model. Another important factor in preventing mix of target material into the fuel is the target walls. As the shock waves move through the walls, the walls first compress and then expand. There can also be material ejected from the liner that mixes into the fuel and degrades the fusion yield. An experimental campaign was conducted on the Omega EP laser facility to study this wall movement and to compare the experimental results with numerical simulations. The key takeaways from these experiments include the observation of an axial dependence of wall movement radially away from the axis, and density profiles that allude to potential mix of target material into the fuel. Overall, the experimental results help to validate and compare HYDRA simulations and predictions. This is crucial because efforts at SNL to scale MagLIF to larger yields are ongoing, and this scaling work relies heavily on simulation capabilities. The discrepancies observed between the experimental wall movement and the simulated wall movement indicate that there are areas where the models, simulations, and measurements could be improved. These and other findings are presented and discussed throughout this dissertation.
- 일반주제명
- Nuclear engineering
- 일반주제명
- Plasma physics
- 일반주제명
- Nuclear physics
- 키워드
- Radiography
- 기타저자
- University of Michigan Nuclear Engineering & Radiological Sciences
- 기본자료저록
- Dissertations Abstracts International. 85-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017162864
■00520250211152105
■006m o d
■007cr#unu||||||||
■020 ▼a9798382740959
■035 ▼a(MiAaPQ)AAI31349069
■035 ▼a(MiAaPQ)umichrackham005522
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a539.76
■1001 ▼aMiller, Stephanie M.
■24510▼aStudies for the Laser Preheating Stage of Magnetized Liner Inertial Fusion
■260 ▼a[Sl]▼bUniversity of Michigan▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a131 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-12, Section: B.
■500 ▼aAdvisor: Kuranz, Carolyn Christine;McBride, Ryan David.
■5021 ▼aThesis (Ph.D.)--University of Michigan, 2024.
■520 ▼aMagnetized Liner Inertial Fusion (MagLIF) is an approach to inertial confinement fusion being studied experimentally on the Z pulsed-power facility at Sandia National Laboratories (SNL). In MagLIF, a preheating laser enters a cylindrical target after passing through a laser entrance hole (LEH) window. The laser then heats the pressurized target fuel and sends shock waves through the fuel, towards the fuel-confining cylindrical metal shell (or "liner"). The shock waves are then transmitted into (and travel through) the liner wall. To scale MagLIF to higher fusion yield and ultimately reach ignition, the laser energy coupled to the fuel must be maximized. Additionally, the laser must not ablate target materials that could mix into and contaminate the fuel. Energy coupling and mix mitigation can be improved with a method of removing the LEH window called "Laser Gate." Presented in this dissertation is a successful proof-of-concept of the Laser Gate method for removing the LEH window. In our experimental tests, the LEH window was removed from the target and cleared from the laser path. The measured window opening time (from fast framing camera images) agrees well with estimates from a simple window opening model. Another important factor in preventing mix of target material into the fuel is the target walls. As the shock waves move through the walls, the walls first compress and then expand. There can also be material ejected from the liner that mixes into the fuel and degrades the fusion yield. An experimental campaign was conducted on the Omega EP laser facility to study this wall movement and to compare the experimental results with numerical simulations. The key takeaways from these experiments include the observation of an axial dependence of wall movement radially away from the axis, and density profiles that allude to potential mix of target material into the fuel. Overall, the experimental results help to validate and compare HYDRA simulations and predictions. This is crucial because efforts at SNL to scale MagLIF to larger yields are ongoing, and this scaling work relies heavily on simulation capabilities. The discrepancies observed between the experimental wall movement and the simulated wall movement indicate that there are areas where the models, simulations, and measurements could be improved. These and other findings are presented and discussed throughout this dissertation.
■590 ▼aSchool code: 0127.
■650 4▼aNuclear engineering
■650 4▼aPlasma physics
■650 4▼aNuclear physics
■653 ▼aInertial confinement fusion
■653 ▼aMagnetized Liner Inertial Fusion
■653 ▼aRadiography
■690 ▼a0759
■690 ▼a0552
■690 ▼a0756
■71020▼aUniversity of Michigan▼bNuclear Engineering & Radiological Sciences.
■7730 ▼tDissertations Abstracts International▼g85-12B.
■790 ▼a0127
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162864▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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