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An Assessment of the Startup Target Quality of Local Helicity Injection Initiated Plasmas via Ohmic Current Drive Sustainment on the Pegasus Spherical Tokamak
An Assessment of the Startup Target Quality of Local Helicity Injection Initiated Plasmas ...
An Assessment of the Startup Target Quality of Local Helicity Injection Initiated Plasmas via Ohmic Current Drive Sustainment on the Pegasus Spherical Tokamak

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211153128
ISBN  
9798346873792
DDC  
530
저자명  
Pierren, Christopher M. B.
서명/저자  
An Assessment of the Startup Target Quality of Local Helicity Injection Initiated Plasmas via Ohmic Current Drive Sustainment on the Pegasus Spherical Tokamak
발행사항  
[Sl] : The University of Wisconsin - Madison, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
241 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
주기사항  
Advisor: Diem, Stephanie J.
학위논문주기  
Thesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
초록/해제  
요약Future nuclear fusion energy systems based on the spherical tokamak magnetic confinement concept would greatly benefit from solenoid-free startup. Viable solenoid-free startup targets must have readily conservable poloidal flux, low impurities, kinetic profiles that are compatible with the sustainment technique, and attractive MHD properties. A promising solenoid-free startup technique is local helicity injection (LHI), which was further refined on the Pegasus spherical tokamak. This work utilized the coupling and sustainment of LHI initiated plasmas with Ohmic current drive to assess startup plasma viability. Assessment included characterizing how the LHI plasmas evolve across the handoff to Ohmic current drive and comparisons with OH-only plasmas. LHI plasmas were found to readily meet the conditions for viability, producing plasmas with readily conservable flux, sufficiently low impurities, and attractive MHD properties. Furthermore, it was found that LHI plasmas appear compatible with auxiliary heating input power, as simultaneous LHI and OH current drive was able to mitigate losses of kinetic energy suffered at the time of handoff when the techniques were applied alone. These results bode well for the technique's continued development.
일반주제명  
Plasma physics
일반주제명  
Electromagnetics
일반주제명  
Applied physics
일반주제명  
Nuclear physics
키워드  
Fusion
키워드  
Helicity
키워드  
Local helicity injection
키워드  
Plasma
키워드  
Tokamak
기타저자  
The University of Wisconsin - Madison Nuclear Engineering & Engineering Physics
기본자료저록  
Dissertations Abstracts International. 86-06B.
전자적 위치 및 접속  
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MARC

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■035    ▼a(MiAaPQ)AAI31767208
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a530
■1001  ▼aPierren,  Christopher  M.  B.
■24513▼aAn  Assessment  of  the  Startup  Target  Quality  of  Local  Helicity  Injection  Initiated  Plasmas  via  Ohmic  Current  Drive  Sustainment  on  the  Pegasus  Spherical  Tokamak
■260    ▼a[Sl]▼bThe  University  of  Wisconsin  -  Madison▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a241  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-06,  Section:  B.
■500    ▼aAdvisor:  Diem,  Stephanie  J.
■5021  ▼aThesis  (Ph.D.)--The  University  of  Wisconsin  -  Madison,  2024.
■520    ▼aFuture  nuclear  fusion  energy  systems  based  on  the  spherical  tokamak  magnetic  confinement  concept  would  greatly  benefit  from  solenoid-free  startup.  Viable  solenoid-free  startup  targets  must  have  readily  conservable  poloidal  flux,  low  impurities,  kinetic  profiles  that  are  compatible  with  the  sustainment  technique,  and  attractive  MHD  properties.  A  promising  solenoid-free  startup  technique  is  local  helicity  injection  (LHI),  which  was  further  refined  on  the  Pegasus  spherical  tokamak.  This  work  utilized  the  coupling  and  sustainment  of  LHI  initiated  plasmas  with  Ohmic  current  drive  to  assess  startup  plasma  viability.  Assessment  included  characterizing  how  the  LHI  plasmas  evolve  across  the  handoff  to  Ohmic  current  drive  and  comparisons  with  OH-only  plasmas.  LHI  plasmas  were  found  to  readily  meet  the  conditions  for  viability,  producing  plasmas  with  readily  conservable  flux,  sufficiently  low  impurities,  and  attractive  MHD  properties.  Furthermore,  it  was  found  that  LHI  plasmas  appear  compatible  with  auxiliary  heating  input  power,  as  simultaneous  LHI  and  OH  current  drive  was  able  to  mitigate  losses  of  kinetic  energy  suffered  at  the  time  of  handoff  when  the  techniques  were  applied  alone.  These  results  bode  well  for  the  technique's  continued  development.
■590    ▼aSchool  code:  0262.
■650  4▼aPlasma  physics
■650  4▼aElectromagnetics
■650  4▼aApplied  physics
■650  4▼aNuclear  physics
■653    ▼aFusion
■653    ▼aHelicity
■653    ▼aLocal  helicity  injection
■653    ▼aPlasma
■653    ▼aTokamak
■690    ▼a0759
■690    ▼a0756
■690    ▼a0215
■690    ▼a0607
■71020▼aThe  University  of  Wisconsin  -  Madison▼bNuclear  Engineering  &  Engineering  Physics.
■7730  ▼tDissertations  Abstracts  International▼g86-06B.
■790    ▼a0262
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17165143▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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