서브메뉴
검색
Understanding the Thermal Conductance of Thin Film Structures for Improved Sensitivity and Refrigeration of Superconducting Microwave Polarimeters
Understanding the Thermal Conductance of Thin Film Structures for Improved Sensitivity and Refrigeration of Superconducting Microwave Polarimeters
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153042
- ISBN
- 9798346876663
- DDC
- 523
- 서명/저자
- Understanding the Thermal Conductance of Thin Film Structures for Improved Sensitivity and Refrigeration of Superconducting Microwave Polarimeters
- 발행사항
- [Sl] : University of Colorado at Boulder, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 191 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
- 주기사항
- Advisor: Halverson, Nils.
- 학위논문주기
- Thesis (Ph.D.)--University of Colorado at Boulder, 2024.
- 초록/해제
- 요약The recent advent of low temperature detectors has enabled incredibly precise measurements of the sub-millimeter sky that have revolutionized our understanding of the origin, structure, and formation history of our Universe. One such detector technology is the transition edge sensor (TES) bolometer, a photon-noise-limited detector that takes advantage of the sharp change in resistance with temperature of a superconducting thin film biased into its phase transition. The sensitivity of TES bolometers increases with lower bath temperatures and lower thermal conductance to the bath temperature.My PhD work has aimed to push TES sensitivity limits further on two fronts. First, I have studied and measured the thermal conductance of the membrane and microstrip wiring thin films that constitute the TES legs. I have found that in our case of very thin membranes, the thermal conductance of the often-neglected microstrip significantly dominates that of the membrane. Second, I have contributed to the development of integrating normal metal-insulator-superconductor junction refrigerators onto TES bolometers to cool the local TES bath temperature from 300 mK to below 150 mK. These devices have demonstrated TES cooling from 300 mK to 187 mK.
- 일반주제명
- Astrophysics
- 일반주제명
- Physics
- 일반주제명
- Astronomy
- 일반주제명
- Applied physics
- 일반주제명
- Condensed matter physics
- 키워드
- Sensitivity
- 키워드
- Refrigeration
- 기타저자
- University of Colorado at Boulder Astrophysical and Planetary Sciences
- 기본자료저록
- Dissertations Abstracts International. 86-06B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017164762
■00520250211153042
■006m o d
■007cr#unu||||||||
■020 ▼a9798346876663
■035 ▼a(MiAaPQ)AAI31639362
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a523
■1001 ▼aHarke-Hosemann, A. H.
■24510▼aUnderstanding the Thermal Conductance of Thin Film Structures for Improved Sensitivity and Refrigeration of Superconducting Microwave Polarimeters
■260 ▼a[Sl]▼bUniversity of Colorado at Boulder▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a191 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-06, Section: B.
■500 ▼aAdvisor: Halverson, Nils.
■5021 ▼aThesis (Ph.D.)--University of Colorado at Boulder, 2024.
■520 ▼aThe recent advent of low temperature detectors has enabled incredibly precise measurements of the sub-millimeter sky that have revolutionized our understanding of the origin, structure, and formation history of our Universe. One such detector technology is the transition edge sensor (TES) bolometer, a photon-noise-limited detector that takes advantage of the sharp change in resistance with temperature of a superconducting thin film biased into its phase transition. The sensitivity of TES bolometers increases with lower bath temperatures and lower thermal conductance to the bath temperature.My PhD work has aimed to push TES sensitivity limits further on two fronts. First, I have studied and measured the thermal conductance of the membrane and microstrip wiring thin films that constitute the TES legs. I have found that in our case of very thin membranes, the thermal conductance of the often-neglected microstrip significantly dominates that of the membrane. Second, I have contributed to the development of integrating normal metal-insulator-superconductor junction refrigerators onto TES bolometers to cool the local TES bath temperature from 300 mK to below 150 mK. These devices have demonstrated TES cooling from 300 mK to 187 mK.
■590 ▼aSchool code: 0051.
■650 4▼aAstrophysics
■650 4▼aPhysics
■650 4▼aAstronomy
■650 4▼aApplied physics
■650 4▼aCondensed matter physics
■653 ▼aThermal conductance
■653 ▼aTransition edge sensor
■653 ▼aThin film structures
■653 ▼aSensitivity
■653 ▼aRefrigeration
■690 ▼a0596
■690 ▼a0605
■690 ▼a0606
■690 ▼a0215
■690 ▼a0611
■71020▼aUniversity of Colorado at Boulder▼bAstrophysical and Planetary Sciences.
■7730 ▼tDissertations Abstracts International▼g86-06B.
■790 ▼a0051
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164762▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
