Magnetosphere Seminars

Below is a schedule of the informal LASP Friends of the Magnetosphere (FOM) Seminars for the Spring 2017 semester. LASP holds a series of informal seminars focused on space physics and plasma research relating to the magnetospheres of Earth and other planets. The intended audience is space and planetary physics researchers in the Boulder area, although in most instances any interested persons are welcome to attend. For more information or if you have questions, please contact allison.jaynes at lasp.colorado.edu.

View the Address and Directions page for detailed directions to any of the LASP locations.

6/15 – Special Summer FOM – New Population of Radiation Belt Particles Observed by Van Allen Probes


Current Schedule:


Current Schedule (expanded):

Jun 15, 2017 – New Population of Radiation Belt Particles Observed by Van Allen Probes

Speaker:   Yuri Shprits (Helmholtz Centre Potsdam)
Date & Time:   Jun 15, 2017 ,  4:00 PM Location: LASP Space Science Building, room N100 (1st floor)
Abstract:  

Recent research provided significant improvements in our understanding of the acceleration mechanisms in the radiation belts. Loss processes are still poorly understood. In this study, we analyze the trapped radiation data from the Van Allen Probes missions and compare observations with modeling. We demonstrate that various loss mechanisms are operational at various energies. Observations and… Read more »

May 18, 2017 – Plasma transport out of the Io torus

Speaker:   Prof. Vytenis Vasyliunas (Max Planck)
Date & Time:   May 18, 2017 ,  4:00 PM Location: LASP Space Science Building, room N248 (2nd floor)
Abstract:  

The Io torus is the primary source of plasma for the magnetosphere of Jupiter, and a number of unanswered or only partially answered questions remain about processes by which the material supplied at a quasi-steady rate from the moon Io is transported outward and ultimately removed from the Jovian system, without removing the magnetic flux… Read more »

May 16, 2017 – The Solar Wind Interaction with Lunar Magnetic Anomalies: A Kinetic Perspective from Simulation

Speaker:   Jan Deca (LASP)
Date & Time:   May 16, 2017 ,  4:00 PM Location: LASP Space Science Building, room N100 (1st floor)
Abstract:  

Plasmas are inherently multi-scale, with typical phenomena spanning over many orders of magnitude in both time and space. To computationally overcome this challenge, implicit (particle-in-cell) algorithms, such as the electromagnetic iPic3D code, have been developed, incorporating the kinetic behavior of plasma without losing track of the global evolution of the system. Next to magnetic reconnection-related… Read more »

May 2, 2017 – “Cause-and-effect relationships between currents and fields, Part II: Currents in condensed matter and collisionless plasmas”

Speaker:   Juan G. Roederer (Geophysical Institute, University of Alaska Fairbanks)
Date & Time:   May 2, 2017 ,  4:00 PM Location: LASP Space Science Building, room N100 (1st floor)
Abstract:  

During Part I we discussed the cause-and-effect relationship for current (and charge) distributions in vacuum. These were given (through some external intervention), and, except for the role of the displacement current ε0 ∂E/∂t, we showed that there is no doubt of which determines which. We ended the presentation with a non-conventional derivation of the retarded… Read more »

Apr 25, 2017 – “Juno: First Passes over Jupiter’s Poles”

Speaker:   Fran Bagenal (LASP)
Date & Time:   Apr 25, 2017 ,  4:00 PM Location: LASP Space Science Building, room N100 (1st floor)
Abstract:  

With 4 successful passes over Jupiter’s poles we now have a sense of the similarities and differences between Earth and Jupiter. I will show you the latest data (Juno, Hubble, Hisaki, Nancy) and discuss what we hope to see over the coming months.

Apr 18, 2017 – “Transition from global to local control of dayside reconnection from ionospheric-sourced mass loading”

Speaker:   Binzheng Zhang (UCAR)
Date & Time:   Apr 18, 2017 ,  4:00 PM Location: LASP Space Science Building, room N100 (1st floor)
Abstract:  

We have conducted a series of controlled numerical simulations to investigate the response of dayside reconnection to idealized, ionosphere-sourced mass loading processes to determine whether they affect the integrated dayside reconnection rate. Our simulation results show that the coupled solar wind-magnetosphere (SW-M) system may exhibit both local and global control behaviors depending on the amount of mass… Read more »

Mar 14 – “Cause-and-effect relationships between currents and fields in vacuum and plasmas”

Speaker:   Juan G. Roederer (Geophysical Institute, University of Alaska Fairbanks)
Date & Time:   Mar 14, 2017 ,  4:00 PM Location: LASP Space Science Building, room N100 (1st floor)
Abstract:  

Electromagnetism is about 200 years old (Ørsted’s discovery); electrodynamics is a bit younger, ~150 years (Maxwell’s equations). Yet, when it comes to understanding (and teaching) cause-and-effect relationships, there are still some issues of confusion or outright misunderstanding. This is particularly true in plasma physics. I will address some questions, such as: Does Maxwell’s displacement current… Read more »

Feb 21, 2017 – “Magneto-sensitivity”

Speaker:   Maria Usanova (LASP)
Date & Time:   Feb 21, 2017 ,  4:00 PM Location: LASP Space Science Building, room N100 (1st floor)
Abstract:  

A wide variety of living organisms (bacteria, algae, insects, fish, amphibians, and mammals) have the ability to perceive magnetic fields and use the Earth’s magnetic field for navigation and homing. For example, homing pigeons can cover several hundred miles and return home from a location they have never seen before. However, magnetic storms can disrupt… Read more »

Feb 7, 2017 – “Anthropogenic Space Weather”

Speaker:   Daniel Baker (LASP)
Date & Time:   Feb 7, 2017 ,  4:00 PM Location: LASP Space Science Building, room N100 (1st floor)
Abstract:  

Anthropogenic effects on the space environment started in the late 19th century and reached their peak in the 1960s when high-altitude nuclear explosions were carried out by the USA and the Soviet Union. These explosions created artificial radiation belts near Earth that resulted in major damage to several satellites. Another, unexpected, impact of the high-altitude… Read more »

Jan 31, 2017 – “Imaging the Top of the Solar Corona: The Final Frontier in Heliophysics”

Speaker:   Craig DeForest (SwRI)
Date & Time:   Jan 31, 2017 ,  4:00 PM Location: LASP Space Science Building, room N100 (1st floor)
Abstract:  

The heliosphere is divided into distinct sections by clearly definable borders. We know the least about the final transition from the dynamics of the expanding corona, to the solar wind itself. This occurs some 20-40 million km from the Sun itself. The region is difficult to access with in situ probes and/or to view with current… Read more »