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Toward the Next Generation of Robust Spin-Polarized Electron Sources
Toward the Next Generation of Robust Spin-Polarized Electron Sources
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104714
- ISBN
- 9798293825998
- DDC
- 530
- 서명/저자
- Toward the Next Generation of Robust Spin-Polarized Electron Sources
- 발행사항
- [Sl] : Cornell University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 165 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
- 주기사항
- Advisor: Bazarov, Ivan.
- 학위논문주기
- Thesis (Ph.D.)--Cornell University, 2025.
- 초록/해제
- 요약Negative Electron Affinity (NEA) GaAs photocathodes are widely employed for generating spin-polarized electron beams, but their extreme sensitivity to chemical poisoning significantly limits their operational lifetime. This thesis investigates strategies to enhance the longevity of spin-polarized electron sources. First, the evolution of beam polarization during photocathode degradation is characterized both experimentally and theoretically. A novel cesium iodide (CsI) surface treatment is then shown to improve lifetime performance. Additionally, GaAs photocathodes incorporating a robust antimony (Sb) layer into the NEA activation are tested under high-current conditions, where ion back-bombardment dominates degradation. Finally, spin-polarized electron emission from GaN photocathodes is measured and characterized for the first time in both hexagonal and cubic crystal orientations.
- 일반주제명
- Physics
- 일반주제명
- Particle physics
- 일반주제명
- Quantum physics
- 일반주제명
- Materials science
- 키워드
- Cesium iodide
- 기타저자
- Cornell University Physics
- 기본자료저록
- Dissertations Abstracts International. 87-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017358522
■00520260202104714
■006m o d
■007cr#unu||||||||
■020 ▼a9798293825998
■035 ▼a(MiAaPQ)AAI32119622
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aLevenson, Samuel Joseph.▼0(orcid)0000-0002-3445-2289
■24510▼aToward the Next Generation of Robust Spin-Polarized Electron Sources
■260 ▼a[Sl]▼bCornell University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a165 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: B.
■500 ▼aAdvisor: Bazarov, Ivan.
■5021 ▼aThesis (Ph.D.)--Cornell University, 2025.
■520 ▼aNegative Electron Affinity (NEA) GaAs photocathodes are widely employed for generating spin-polarized electron beams, but their extreme sensitivity to chemical poisoning significantly limits their operational lifetime. This thesis investigates strategies to enhance the longevity of spin-polarized electron sources. First, the evolution of beam polarization during photocathode degradation is characterized both experimentally and theoretically. A novel cesium iodide (CsI) surface treatment is then shown to improve lifetime performance. Additionally, GaAs photocathodes incorporating a robust antimony (Sb) layer into the NEA activation are tested under high-current conditions, where ion back-bombardment dominates degradation. Finally, spin-polarized electron emission from GaN photocathodes is measured and characterized for the first time in both hexagonal and cubic crystal orientations.
■590 ▼aSchool code: 0058.
■650 4▼aPhysics
■650 4▼aParticle physics
■650 4▼aQuantum physics
■650 4▼aMaterials science
■653 ▼aNegative Electron Affinity
■653 ▼aCesium iodide
■653 ▼aSpin-polarized electron beams
■653 ▼aBeam polarization
■653 ▼aIon back-bombardment
■690 ▼a0605
■690 ▼a0798
■690 ▼a0599
■690 ▼a0794
■71020▼aCornell University▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g87-03B.
■790 ▼a0058
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358522▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
