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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
Studies for the Laser Preheating Stage of Magnetized Liner Inertial Fusion

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211152105
ISBN  
9798382740959
DDC  
539.76
저자명  
Miller, Stephanie M.
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  
Inertial confinement fusion
키워드  
Magnetized Liner Inertial Fusion
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

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■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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