Online Cold-Plasma Seminars
A forum for discussions and knowledge-sharing, with the objective of advancing cold-plasma science in magnetospheric physics.
- February 21st, Jeremy Dargent (virtual)
Impact of cold ions on magnetic reconnection: reconnection rate and energy budget analysis
Recorded Talk
Abstract - March 20th, Noora Partamies (virtual)
Pulsating aurora structure and evolution - April 17th, Lauren Blum (virtual)
Global plasmaspheric dynamics and the role of cold plasma in radiation belt loss
Recorded Talk
Abstract - May 15th, Eric Donovan (in person)
Boundaries and Structures in the Diffuse Aurora
Recorded Talk
Abstract - June 19th, Oleksiy Agapitov (in person)
The Effects of the Cold Plasma for Wave-particle Interactions in the Outer Radiation Belt - July 17th, Phil Erickson
Statistical Views of Cold Plasma in the Ionosphere from GNSS TEC
Recorded Talk
Abstract - August 21st, Roger Varney (in person)
Sources of Structured Ion Outflow - September 18th, Kareem Sorathia (virtual)
- April 19th, Scott Thaller
Relationship of the statistical Total Density, Electric Field, ExB flow, and Low Energy Ion Pressures on global and meso scales in the inner magnetosphere as observed by the Van Allen Probes
Recorded Talk
Abstract - May 17th, David Malaspina
Plasma Imaging, Local measurement, and Tomographic experiment (PILOT), a Mission Concept Enabling Transformational Multi-scale Observations of Cold Plasma Dynamics in Earth's Magnetosphere
Recorded Talk
Abstract - June 21st, Yuri Shprits
Ultra-relativistic Electrons in the Van Allen Radiation Belts (online talk only)
Recorded Talk
Abstract - July 19th, Louis Richard
Fast Ion Isotropization by Current Sheet Scattering in Magnetic Reconnection Jets
Recorded Talk
Abstract - August 16th, Michael G. Henderson
Coupling Between Intense Meso-Scale Auroral Streamer Structures, the Concurrent Generation of Giant Undulations and STEVE Emissions, and Intermixing of Cold and Hot Plasma Populations in the Dusk to Pre-Midnight Plasmapause Region
Recorded Talk
Abstract - September 21st, Allison Jaynes
The role of cold plasma in diffuse-like auroral precipitation and M-I coupling
Recorded Talk
Abstract - October 18th, Dave Hartley
Observations and Modeling of Cold Plasma Density, and How it Impacts Wave Dynamics and Measurements
Recorded Talk
Abstract - November 8th, Alex Glocer
Studying the Origin of Near-Earth Plasma
(Talk not recorded)
- January 5, Brian Walsh
Cold Magnetospheric Plasma and Dayside Coupling
Recorded Talk
Passcode:!f7iD3Q@ - January 19, Jean-Francois Ripoll
The electron plasma density measured by the Van Allen Probes - February 2, Jing Liao, Space Science Center at New Hampshire University
Access of Ionospheric Ions to the Plasma Sheet
Recorded Talk
Passcode:.b@T8Fze - February 16, Viviane Pierrard
The dynamics of the plasmasphere and its links to the radiation belts
(Seminar not recorded) - March 2, Richard Denton
Measuring the Total Density in the Magnetosphere
Recorded Talk
Passcode: gM4*=7Me - March 16, Naritoshi Kitamura
On the relationship between energy input to the ionosphere and the ion outflow flux under different solar zenith angles
Recorded Talk
Passcode: &jL7H&rf - April 20, John Lyon
Multifluid Simulations of the Magnetosphere
Recorded Talk
Passcode: &17trk2^ - May 4, Jacob Bortnik
The effects of cold plasma density on wave-particle interactions
Recorded Talk
Passcode: 5^PKJP.% - May 18, Justin H. Lee
On the need for more frequent cold ion measurements: Perspectives from investigating EMIC waves
No Recorded talk
June 1, Ying Zou
Geospace Plume and Its Impact on Dayside Magnetopause Reconnection Rate
Recorded Talk
Passcode: C1MYwqw& - June 15, Jörg-Micha Jahn
When life gives you lemons: How to squeeze Van Allen Probes in situ particle observations beyond what you might have thought possible to learn about cold ions and global plasmasphere dynamics.
Recorded Talk
Passcode: 5E*&NJk= - July 6, Dennis Gallagher
Is Plasmasphere Erosion More Than One Thing?
No recorded talk - July 20, Xiangning Chu
Unraveling the mystery of plasmaspheric dynamics using machine learning approach
Recorded Talk
Passcode: ?wZx7+Z0 - August 3, Cecilia Norgren
On the presence and thermalization of cold plasma in the reconnection exhaust
Recorded Talk
Passcode: es$8&U.M - August 17, Dan Welling
Global Consequences of Cold Plasma in the Magnetosphere-Ionosphere System
Recorded Talk
Passcode: S?6atLm7 - September 21, Toshi Nishimura
Multi-Scale Density Structures in the Plasmaspheric Plume
Recorded Talk
Passcode: 1^q64GDG - October 5, Rhyan Sawyer
Low Energy Ions Within the Cusp: TRICE 2 Observations
Recorded Talk
Passcode: 9V%tz6Fx - October 19, Lauren Blum
The role of cold plasma in EMIC wave structure and evolution
CANCELLED - November 2, Elena Kronberg
Circulation of ionospheric ions and their impact on the magnetospheric dynamics
Recorded Talk
Passcode: 6TDH+g62 - November 16, Wen Li
Whistler-mode Waves in the Earth’s Plasmasphere and Plumes and Their Effects on Energetic Electron Loss
- June 2, Mats André, Swedish Institute of Space Physics
Cold Ionospheric Ions in the Magnetosphere: Where They Are and What They Do
(Seminar not recorded) - June 16, Rick Chappell, Vanderbilt University
Ionospheric Ions as a Driver of the Dynamics of Substorms and Storms
Recorded Talk
Passcode: BHn4?SHH - July 7, Jerry Goldstein, Southwest Research Institute
Ions of the Plasmasphere, Trough, and Cloak
(Seminar not recorded) - July 21, Maria Usanova, University of Colorado Boulder
EMIC wave observations on the Van Allen Probes: recent results
(Seminar not recorded) - August 4, Densheng Han, Tongji University
Dayside diffuse Aurora and the cold-plasma structuring
Recorded Talk
Passcode: @S=^To0@ - August 18, Mike Hartinger, Space Science Institute
Relationship between ULF wave power and plasma density: THEMIS observations and numerical simulations
Recorded Talk
Passcode: =4mmG9LK - September 22, Joe Huba, Syntek Technologies
High Resolution Ionosphere/Plasmasphere/Thermosphere Modeling Studies: Plasmasphere Ducts/Irregularities
Recorded Talk
Passcode: D5.?R92& - October 6, Sergio Toledo-Redondo, University of Murcia, Spain
Impacts of ionospheric-originating ions on magnetic reconnection at the magnetopause and magnetotail
Recorded Talk
Passcode: U2pr.L41 - October 20, Jonathan Krall, Naval Research Laboratory
Ring-current heating of the ionosphere/plasmasphere and related H+ and O+ outflows
Recorded Talk
Passcode: @0+PH#u9 - November 3, Raluca Ilie, University of Illinois Urbana Champaign
How the outflowing ionospheric N+ is altering the near-Earth cold plasma dynamics
(Seminar not recorded) - November 17, Natalia Buzulukova, NASA Goddard Space Flight Center
Warm plasma population in the inner magnetosphere: what we know and do not know so far
Recorded Talk
Passcode: *?0@Nk99 - December 1, Naomi Maruyama, University of Colorado Boulder
Physical modeling of journey of cold plasma populations in geospace
(Seminar not recorded)
Each seminar in the series takes place at
12:00 – 13:00 PM Eastern Daylight Time (4-5 p.m. Universal Time Coordinated, 5-7 p.m. Central European Summer time)
Motivation
The Earth’s magnetosphere comprises multiple ion and electron populations with a broad range of energies, from the sub-eV particles of the ionosphere to the relativistic particles of the radiation belts. These diverse particle populations are co-located and interact through a variety of processes, including various plasma waves.
While the warm (ring current/plasma sheet) and hot (radiation belts) populations have received a lot of attention in part because of their potential harm to space infrastructure, the cold populations (with energy less than ~100 eV) are the least studied and in some cases have been referred to as the ‘hidden populations’. This is because spacecraft are typically charged to levels that make measuring the cold plasma properties very difficult and sometimes impossible. For electrons, an additional complication is that spacecraft surfaces exposed to sunlight and bombarded by energetic particles emit secondary electrons with energies comparable to those of the cold electrons of the environment that can completely dominate the detector measurement.
However, the cold plasma has a strong impact on many phenomena that are critical to the dynamics of the near-Earth environment, both locally and globally. Examples include
- the cold plasma being the source of hot magnetospheric plasma
- solar-wind/magnetosphere coupling
- tail reconnection and substorm dynamics
- wave-particle interaction physics,
- plasmasphere/plasmasheet interactions
- structuring of the pulsating aurora.
Given the sparsity of measurements and the generally poor understanding of the cold populations, it is plausible that other impacts not yet known might exist. In all, this leaves a major gap in our understanding of the magnetosphere-ionosphere system.
