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Active Optics on the Vera C. Rubin Observatory
Active Optics on the Vera C. Rubin Observatory
Active Optics on the Vera C. Rubin Observatory

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105608
ISBN  
9798265426857
DDC  
522.1
저자명  
Homar, Guillem Megias.
서명/저자  
Active Optics on the Vera C. Rubin Observatory
발행사항  
[Sl] : Stanford University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
208 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Kahn, Steven;Pavone, Marco.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2025.
초록/해제  
요약The Vera C. Rubin Observatory, which achieved first light on April 15, 2025, is set to revolutionize astronomy through the 10-year Legacy Survey of Space and Time (LSST), producing an unprecedented volume of observational data. Its Simonyi Survey Telescope, a wide-field optical system, relies on active optics to dynamically correct aberrations and maintain exceptional image quality. This dissertation develops and implements state-of-the-art methodologies to optimize Rubin's active optics, leading to the first on-sky demonstration of its performance. The first on-sky image, relying solely on the open-loop control improvements presented here, achieved an impressive image quality of 1.7 arcsecond. As commissioning progressed, continued refinements allowed the system to consistently deliver seeing-limited imaging, with a telescope contribution reaching as low as 0.4 arcsecond at optimal conditions, even before the system was fully operational-- an achievement reached in record time. Although further improvements are still required, these results underscore the critical role of active optics in enabling LSST's scientific discoveries.Achieving this precision required addressing critical challenges, including resolving degeneracies in the high-dimensional control space, refining open-loop corrections, implementing laser tracker-based alignment, and characterizing thermal and mirror figure effects on image quality. The commissioning efforts, using both the Commissioning Camera (ComCam) and LSSTCam-- the largest digital camera ever built--, resulted in the first optical performance assessment of the Simonyi Survey Telescope, presented here as a preliminary validation of its design specifications.Additionally, this work introduces an approach for detecting Fast Optical Bursts (FOBs)-- millisecond-long transients that have been proposed as potential counterparts to Fast Radio Bursts (FRBs). This novel method leverages machine learning and a detailed understanding of the atmospheric PSF to identify these short-lived events, laying the groundwork for real-time transient detection and advancing the prospects of multi-messenger astronomy.The methodologies developed here extend beyond Rubin, providing a framework for future active optics implementations in next-generation extremely large telescopes, such as the Giant Magellan Telescope (GMT) and the Thirty Meter Telescope (TMT). These findings will serve as a key reference for understanding the operation of the active optics system and optical performance of the Rubin Observatory, maximizing the scientific return of LSST for the broader astronomical community.
일반주제명  
Telescopes
일반주제명  
Astronomy
일반주제명  
Satellites
일반주제명  
Lasers
일반주제명  
Observatories
일반주제명  
Optics
일반주제명  
Engineers
일반주제명  
Universe
일반주제명  
Aerospace engineering
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aHomar,  Guillem  Megias.
■24510▼aActive  Optics  on  the  Vera  C.  Rubin  Observatory
■260    ▼a[Sl]▼bStanford  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a208  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Kahn,  Steven;Pavone,  Marco.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2025.
■520    ▼aThe  Vera  C.  Rubin  Observatory,  which  achieved  first  light  on  April  15,  2025,  is  set  to  revolutionize  astronomy  through  the  10-year  Legacy  Survey  of  Space  and  Time  (LSST),  producing  an  unprecedented  volume  of  observational  data.  Its  Simonyi  Survey  Telescope,  a  wide-field  optical  system,  relies  on  active  optics  to  dynamically  correct  aberrations  and  maintain  exceptional  image  quality.  This  dissertation  develops  and  implements  state-of-the-art  methodologies  to  optimize  Rubin's  active  optics,  leading  to  the  first  on-sky  demonstration  of  its  performance.  The  first  on-sky  image,  relying  solely  on  the  open-loop  control  improvements  presented  here,  achieved  an  impressive  image  quality  of  1.7  arcsecond.  As  commissioning  progressed,  continued  refinements  allowed  the  system  to  consistently  deliver  seeing-limited  imaging,  with  a  telescope  contribution  reaching  as  low  as  0.4  arcsecond  at  optimal  conditions,  even  before  the  system  was  fully  operational--  an  achievement  reached  in  record  time.  Although  further  improvements  are  still  required,  these  results  underscore  the  critical  role  of  active  optics  in  enabling  LSST's  scientific  discoveries.Achieving  this  precision  required  addressing  critical  challenges,  including  resolving  degeneracies  in  the  high-dimensional  control  space,  refining  open-loop  corrections,  implementing  laser  tracker-based  alignment,  and  characterizing  thermal  and  mirror  figure  effects  on  image  quality.  The  commissioning  efforts,  using  both  the  Commissioning  Camera  (ComCam)  and  LSSTCam--  the  largest  digital  camera  ever  built--,  resulted  in  the  first  optical  performance  assessment  of  the  Simonyi  Survey  Telescope,  presented  here  as  a  preliminary  validation  of  its  design  specifications.Additionally,  this  work  introduces  an  approach  for  detecting  Fast  Optical  Bursts  (FOBs)--  millisecond-long  transients  that  have  been  proposed  as  potential  counterparts  to  Fast  Radio  Bursts  (FRBs).  This  novel  method  leverages  machine  learning  and  a  detailed  understanding  of  the  atmospheric  PSF  to  identify  these  short-lived  events,  laying  the  groundwork  for  real-time  transient  detection  and  advancing  the  prospects  of  multi-messenger  astronomy.The  methodologies  developed  here  extend  beyond  Rubin,  providing  a  framework  for  future  active  optics  implementations  in  next-generation  extremely  large  telescopes,  such  as  the  Giant  Magellan  Telescope  (GMT)  and  the  Thirty  Meter  Telescope  (TMT).  These  findings  will  serve  as  a  key  reference  for  understanding  the  operation  of  the  active  optics  system  and  optical  performance  of  the  Rubin  Observatory,  maximizing  the  scientific  return  of  LSST  for  the  broader  astronomical  community.
■590    ▼aSchool  code:  0212.
■650  4▼aTelescopes
■650  4▼aAstronomy
■650  4▼aSatellites
■650  4▼aLasers
■650  4▼aObservatories
■650  4▼aOptics
■650  4▼aEngineers
■650  4▼aUniverse
■650  4▼aAerospace  engineering
■690    ▼a0752
■690    ▼a0606
■690    ▼a0538
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360701▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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