Class Central is learner-supported. When you buy through links on our site, we may earn an affiliate commission.

YouTube

Magnetic Reconnection - Plasmoid Instability in an Experimentally Accessible Regime by Pallavi Bhat

International Centre for Theoretical Sciences via YouTube

Overview

Explore magnetic reconnection and plasmoid instability in an hour-long lecture by Pallavi Bhat from the International Centre for Theoretical Sciences. Delve into the fundamental plasma physics phenomenon relevant to laboratory, space, and astrophysical systems. Learn about the Sweet-Parker model, tearing mode instability, and the semi-collisional regime. Examine theoretical predictions and numerical simulations using a reduced gyrokinetic model. Discover how plasmoid instability arises at lower, experimentally accessible Lundquist numbers. Gain insights into the reconnection phase diagram, simulation setups, and validation of the semi-collisional regime. Investigate current sheet scaling, wavenumber scaling, and the potential for observing plasmoids in experiments at low Lundquist numbers. Conclude with a summary of findings and future research directions in this critical area of plasma physics.

Syllabus

Magnetic reconnection: plasmid instability in an experimentally accessible regime
Outline
Introduction to magnetic reconnection - Sweet-Parker model 1956
Plasmid Instability
Plasmid Instability - multiple X-line reconnection
Tearing mode instability : spontaneous reconnection
Tearing mode theory
Tearing mode instability : nonlinear regime
Reconnection phase diagram
Reconnection phase diagram zoomed in
Semi-collisional regime
Plasmid instability scalings in semi-collisional regime
Plasmid instability in semi-collisional regime
Simulation Setup
Sequence of events in the simulation
Simulation : S = 2997, L/p3=76.7 Run G
Validation of semi-collisional regime
Do current sheets scale as Sweet-Parker?
Wavenumber scaling
Plasmids seen in experiments at low S?
Summary and future plans

Taught by

International Centre for Theoretical Sciences

Reviews

Start your review of Magnetic Reconnection - Plasmoid Instability in an Experimentally Accessible Regime by Pallavi Bhat

Never Stop Learning.

Get personalized course recommendations, track subjects and courses with reminders, and more.

Someone learning on their laptop while sitting on the floor.