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Lazarian Turbulent Reconnection 2020
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Executive Summary
This document explores how magnetic fields in space break and reconnect when the environment is turbulent, a process that happens much faster than previously thought. It explains that this 'turbulent reconnection' is a key factor in how stars form and how cosmic rays are accelerated across the universe.
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ST_CODE: ON2020
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DOC-LAZARIAN
Process Date
2020-01-06
Integrity Hash
SHA256-LAZARIANTURB...
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COMPLETE
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INVESTIGATIVE ANALYSIS
Summary
This document explores how magnetic fields in space break and reconnect when the environment is turbulent, a process that happens much faster than previously thought. It explains that this 'turbulent reconnection' is a key factor in how stars form and how cosmic rays are accelerated across the universe.
Origin
The paper was authored by a team of researchers from the University of Wisconsin-Madison, Johns Hopkins University, Universidade de São Paulo, and Los Alamos National Laboratory. It was likely sourced from the arXiv preprint server (arXiv:2001.00868v1).
Purpose
The authors conducted this research to address a fundamental conflict in astrophysics: traditional theories suggest magnetic fields should be 'frozen' into plasma, yet observations show they frequently reconnect and release energy rapidly. The paper aims to prove that 3D turbulence is the primary mechanism that triggers fast magnetic reconnection.
Why It Matters
" This research is highly relevant to advanced energy and propulsion studies, specifically Field-Reversed Configuration (FRC) and fusion research, where magnetic reconnection and plasma stability are critical. The presence of Los Alamos National Laboratory as a contributing institution and the 'SecretMilitaryTechnology.com' watermarks suggest the content is being monitored for its applications in high-energy density physics and potential defense-related aerospace programs. "
Key Claims
- › The paper was authored by Alex Lazarian, Gregory L. Eyink, Amir Jafari, Grzegorz Kowal, Hui Li, Siyao Xu, and Ethan T. Vishniac.
- › Hui Li is affiliated with the Los Alamos National Laboratory in Los Alamos, New Mexico.
- › The document states that the Lazarian & Vishniac 1999 paper first proposed that 3D turbulence makes magnetic reconnection fast.
- › The document cites the arXiv identifier arXiv:2001.00868v1, dated 3 January 2020.
- › The research identifies the Department of Astronomy at the University of Wisconsin as the primary affiliation for lead author Alex Lazarian.
Contribution to the Field
It provides a rigorous theoretical and numerical framework demonstrating that in 3D environments, magnetic reconnection becomes independent of plasma resistivity due to self-induced turbulence, effectively overturning the 'flux-freezing' textbook concept for large-scale astrophysical systems.
External Primary Sources (3)
Verified external sources that corroborate the claims in this document.
patent
US Patent 9,947,420 B2 — Magnetic field plasma confinement for compact fusion power
conference 2019
Recent Achievements in the C-2W Field-Reversed Configuration Experiment — APS DPP19
TAE Technologies
paper 2019-06-05
Formation of hot, stable, long-lived field-reversed configuration plasmas on the C-2W device — Nuclear Fusion
H. Gota et al.
Full Transcript
Transcript
Page 1 of 50
Page 1
TurbulentReconnection
3D Turbulent Reconnection: Theory, Tests &
Astrophysical Implications
AlexLazarian,1,a) GregoryL.Eyink,2,3 AmirJafari,3 GrzegorzKowal,4 HuiLi,5
SiyaoXu,1 andEthanT.Vishniac3
1)DepartmentofAstronomy,UniversityofWisconsin,475NorthCharterStreet,Madison,WI53706,
USA
2)DepartmentofAppliedMathematics&Statistics,TheJohnsHopkinsUniversity,Baltimore,
MD21218,USA
3)DepartmentofPhysics&Astronomy,JohnsHopkinsUniversity,3400N.CharlesStreet,
Baltimore,MD21218,USA
4)Escola de Artes, Cieˆncias e Humanidades, Universidade de Sa˜o Paulo,
Av. Arlindo Be´ttio, 1000 - Vila Guaraciaba, Sa˜o Paulo - SP, CEP: 03828-000,
Brazil
5)LosAlamosNationalLaboratory,LosAlamos,NM87545,USA
(Dated:6January2020)
Magnetic reconnection, topological change in magnetic fields, is a fundamental process
in magnetized plasmas. It is associated with energy release in regions of magnetic field
annihilation,butthisisonlyonefacetofthisprocess. Astrophysicalfluidflowsnormally
have very large Reynolds numbers and are expected to be turbulent, in agreement with
observations. In strong turbulence magnetic field lines constantly reconnect everywhere
andonallscales,thusmakingmagneticreconnectionanintrinsicpartoftheturbulentcas-
cade. We note in particular that this is inconsistent with the usual practice of regarding
magneticfieldlinesaspersistentdynamicalelements. Anumberoftheoretical,numerical,
andobservationalstudiesstartingwiththeLazarian&Vishniac1999paperproposedthat
3Dturbulencemakesmagneticreconnectionfastandthatmagneticreconnectionandtur-
bulenceareintrinsicallyconnected. Inparticular,wediscussthedramaticviolationofthe
textbookconceptofmagneticflux-freezinginthepresenceofturbulence. Wedemonstrate
thatinthepresenceofturbulencetheplasmaeffectsaresubdominanttoturbulenceasfar
as the magnetic reconnection is concerned. The latter fact justifies an MHD-like treat-
mentofmagneticreconnectiononallscalesmuchlargerthantherelevantplasmascales.
We discuss numerical and observational evidence supporting the turbulent reconnection
model. In particular, we demonstrate that the tearing reconnection is suppressed in 3D
and, unlikethe2Dsettings, 3Dreconnectioninducesturbulencethatmakesmagneticre-
connection independent of resistivity. We show that turbulent reconnection dramatically
affectskeyastrophysicalprocesses,e.g. starformation,turbulentdynamo,accelerationof
cosmicrays. Weprovidecriticismoftheconceptof“reconnection-mediatedturbulence”
andexplainwhyturbulentreconnectionisverydifferentfromenhancedturbulentresistiv-
ityandhyper-resistivity,andwhythelatterhavefatalconceptualflaws.
PACSnumbers: ValidPACSappearhere
Keywords: Suggestedkeywords
I. PROBLEMOFMAGNETICRECONNECTIONINASTROPHYSICS
Magnetic fields are ubiquitous in astrophysical systems and critically affect the dynamics and
propertiesofmagnetizedplasmasoveranextendedrangeofscales. Thesescalesaretypicallymuch
largerthananyrelevantplasmascales,e.g.,theioninertiallength. ThemagneticfieldoftheEarth’s
magnetosphere, thecase-studyofmanyinsitumeasurements, isanexceptionintheastrophysical
context in terms of the involved scales. In what follows, we will discuss magnetic fields at much
largerscales.
a)Electronicmail:[email protected]
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Frequently Asked Questions
What is this document? ▾
This document explores how magnetic fields in space break and reconnect when the environment is turbulent, a process that happens much faster than previously thought. It explains that this 'turbulent reconnection' is a key factor in how stars form and how cosmic rays are accelerated across the unive...
Where does this document come from? ▾
The paper was authored by a team of researchers from the University of Wisconsin-Madison, Johns Hopkins University, Universidade de São Paulo, and Los Alamos National Laboratory. It was likely sourced from the arXiv preprint server (arXiv:2001.00868v1).
What is the research purpose of this document? ▾
The authors conducted this research to address a fundamental conflict in astrophysics: traditional theories suggest magnetic fields should be 'frozen' into plasma, yet observations show they frequently reconnect and release energy rapidly. The paper aims to prove that 3D turbulence is the primary mechanism that triggers fast magnetic reconnection.