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A Study of Magnetized Plasma Turbulence in the Nonrelativistic and Relativistic Regimes
A Study of Magnetized Plasma Turbulence in the Nonrelativistic and Relativistic Regimes
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151427
- ISBN
- 9798382580050
- DDC
- 530
- 서명/저자
- A Study of Magnetized Plasma Turbulence in the Nonrelativistic and Relativistic Regimes
- 발행사항
- [Sl] : The University of Wisconsin - Madison, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 167 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
- 주기사항
- Advisor: Boldyrev, Stanislav.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
- 초록/해제
- 요약Turbulence is ubiquitous in space and astrophysical plasmas and is believed to play an important role in particle heating and nonthermal acceleration. These plasmas are commonly threaded by an external magnetic field imposed by the object they surround (e.g., planet, star), making magnetized plasma turbulence a problem of significant interest. In this thesis, we use numerical simulations to study two relatively unexplored regimes of magnetized plasma turbulence, viz., the sub-electron inertial scale in nonrelativistic low electron beta plasmas and both the magnetohydrodynamic and kinetic scales in relativistically hot plasmas. Phenomenology is used to model the energy distribution of turbulent fluctuations and particles.In the nonrelativistic regime studied, energy dissipation is seen to be strongly intermittent, concentrating on electron-scale current sheets. A few of these current sheets exhibit signatures of electron-only reconnection.The particle energy probability density function in the relativistic regime displays a nonthermal tail of ultrarelativistic particles that goes from power-law-like to log-normal as the guide field is increased. We propose that this can be understood in terms of the acceleration mechanism that dominates in each case. Also noteworthy is the observed intermittency in the spatial distribution of ultrarelativistic particles.
- 일반주제명
- Plasma physics
- 일반주제명
- Astrophysics
- 일반주제명
- Theoretical physics
- 키워드
- Planet
- 기타저자
- The University of Wisconsin - Madison Physics
- 기본자료저록
- Dissertations Abstracts International. 85-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211151427
■006m o d
■007cr#unu||||||||
■020 ▼a9798382580050
■035 ▼a(MiAaPQ)AAI31294867
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aVega, Cristian S.
■24512▼aA Study of Magnetized Plasma Turbulence in the Nonrelativistic and Relativistic Regimes
■260 ▼a[Sl]▼bThe University of Wisconsin - Madison▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a167 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-11, Section: B.
■500 ▼aAdvisor: Boldyrev, Stanislav.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
■520 ▼aTurbulence is ubiquitous in space and astrophysical plasmas and is believed to play an important role in particle heating and nonthermal acceleration. These plasmas are commonly threaded by an external magnetic field imposed by the object they surround (e.g., planet, star), making magnetized plasma turbulence a problem of significant interest. In this thesis, we use numerical simulations to study two relatively unexplored regimes of magnetized plasma turbulence, viz., the sub-electron inertial scale in nonrelativistic low electron beta plasmas and both the magnetohydrodynamic and kinetic scales in relativistically hot plasmas. Phenomenology is used to model the energy distribution of turbulent fluctuations and particles.In the nonrelativistic regime studied, energy dissipation is seen to be strongly intermittent, concentrating on electron-scale current sheets. A few of these current sheets exhibit signatures of electron-only reconnection.The particle energy probability density function in the relativistic regime displays a nonthermal tail of ultrarelativistic particles that goes from power-law-like to log-normal as the guide field is increased. We propose that this can be understood in terms of the acceleration mechanism that dominates in each case. Also noteworthy is the observed intermittency in the spatial distribution of ultrarelativistic particles.
■590 ▼aSchool code: 0262.
■650 4▼aPlasma physics
■650 4▼aAstrophysics
■650 4▼aTheoretical physics
■653 ▼aHigh-energy astrophysics
■653 ▼aMagnetic reconnection
■653 ▼aMagnetized plasma turbulence
■653 ▼aRelativistic plasmas
■653 ▼aPlanet
■690 ▼a0759
■690 ▼a0596
■690 ▼a0753
■71020▼aThe University of Wisconsin - Madison▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g85-11B.
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161661▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
