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"Friends of the Magnetosphere" Seminars

Below is a schedule of the informal LASP Friends of the Magnetosphere(FOM) Seminars for the Spring 2013 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 Rob.Wilson at lasp.colorado.edu

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


Full Schedule

January 10, 2013 – “Cluster observations of energy conversion in plasma sheet vortex flows”

Speaker:   Maria Hamrin (Umeå University, Sweden)
Date:   January 10, 2013
Time:   1:00 PM (note the time change)
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

none provided

February 12, 2013 – “The cusp and polar magnetosphere at Saturn from Cassini”

Speaker:   Chris Arridge (MSSL, UK)
Date:   February 12, 2013
Time:   4:00 PM
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

High latitude orbits from Cassini have presented the first opportunity to fully explore the polar magnetosphere of a giant planet. In this talk we describe some of the findings from ongoing studies of the polar magnetosphere of Saturn. We will focus on case studies of passages through the cusp region and statistical work on high […]

February 26, 2013 – “Utilizing ParaView for Visualization and Data Analysis Tasks in the Heliophysics Community”

Speaker:   Joshua Murphy (LASP)
Date:   February 26, 2013
Time:   4:00 PM
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

For the past year, the CISM Knowledge Transfer group has been designing and implementing LFM and Enlil data readers for the ParaView visualization system. With the goal of providing a standardized visualization and data analysis platform for CISM scientists, we have been optimizing our code to allow for fast and effective time-based 3D data visualization […]

March 12, 2013 – “Energetic radiation belt electron precipitation showing ULF modulation”

Speaker:   Thiago Brito (Dartmouth)
Date:   March 12, 2013
Time:   4:00 PM
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

The energization and loss processes for energetic radiation belt electrons are not yet well understood. Ultra Low Frequency (ULF) waves have been correlated with both enhancement in outer zone radiation belt electron flux and modulation of precipitation loss to the atmosphere. This study considers the effects of ULF waves in the Pc-4 to Pc-5 period […]

April 2, 2013 – “Information Theory and Multivariate Analysis in Space Physics”

Speaker:   E. Joshua Rigler (USGS)
Date:   March 2, 2013
Time:   4:00 PM
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

Information theory is, primarily, concerned with quantifying the uncertainty of sets of related random variables. This uncertainty is usually described by a probability density distribution, the Gaussian distribution being one of the most familiar and widely used, due to its simple parametric form. In this talk, I review “classical” multivariate Gaussian probability density distributions, then […]

April 16, 2013 – “A Rocket-Borne Investigation of Auroral Electrodynamics within the Current Closure Ionosphere”

Speaker:   Stephen R. Kaeppler (University of Iowa)
Date:   April 16, 2013
Time:   4:00 PM
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

The Auroral Current and Electrodynamics Structure (ACES) mission consisted of two sounding rockets launched nearly simultaneously from Poker Flat Research Range, AK on January 29, 2009 into a dynamic multiple-arc aurora. The ACES rocket mission, in conjunction with the PFISR Radar, was designed to observe the three-dimensional current system of a stable auroral arc system. […]

April 17, 2013 – “Electromagnetic Ion Cyclotron (EMIC) Waves: Theory and Observations”

Speaker:   Maria Usanova (University of Alberta)
Date:   April 17, 2013
Time:   10:00 AM
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

Electromagnetic Ion Cyclotron (EMIC) waves are believed to play an important role in the dynamics of energetic particles (both electrons and ions) trapped by the Earth’s magnetic field causing them to precipitate into the ionosphere via resonant interaction. In order to incorporate EMIC-related loss processes into global magnetospheric models one needs to know solar wind […]

April 23, 2013 – “Magnetohydrodynamic turbulence in interplanetary space plasma”

Speaker:   Raffaele Marino (UCAR)
Date:   April 23, 2013
Time:   4:00 PM
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

The whole heliosphere is permeated by the solar wind (SW), a supersonic plasma flow of solar origin which continuously expands into space. During its expansion, the SW develops a strong turbulent character, which evolves towards a state that resembles the well known hydrodynamic turbulence described by Kolmogorov. Because of a strong carried magnetic field, low-frequency […]

April 30, 2013 – “Estimating magnetic field power spectrum and the magnetic diffusion coefficients using CRRES magnetometer data”

Speaker:   Ashar Ali (LASP)
Date:   April 30, 2013
Time:   4:00 PM
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

Radial diffusion has been established as one of the acceleration mechanisms responsible for populating and depleting the Van Allen radiation belts with high energy charged particles. Random perturbations in the fields energize particles over ULF time scales by conserving the first and second adiabatic invariants of a particle while violating the third adiabatic invariant which […]

May 07, 2013 – “The Relativistic Electron-Proton Telescope (REPT) Instruments On Board the Van Allen Probes Mission: Characterization of Earth’s Radiation Belt High-Energy Particle Populations”

Speaker:   Dan Baker (LASP)
Date:   May 07, 2013
Time:   4:00 PM
Location:   Note: different room: LASP Space Science Building, room W120. Map
Abstract:  

Particle acceleration and loss in the megaelectron Volt (MeV) energy range (and above) is the least understood aspect of radiation belt science. In order to measure cleanly both the energetic electron and energetic proton components, there has long been a need for a carefully designed detector system. The Relativistic Electron-Proton Telescope (REPT) on board the […]

May 14, 2013 – “Thermospheric Density Response to Sheath-Enhanced Geospace Storms”

Speaker:   Delores Knipp (CU)
Date:   May 14, 2013
Time:   4:00 PM
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

I will discuss the likely solar wind and magnetospheic drivers for a group of storms with uncharacteristically low thermosphere density response given the level of energy input suggested by standard magnetic indices. The characteristics of these anomalous storms are: 1) multi-hour, pre-storm solar wind density enhancement accompanied by neutral to northward interplanetary magnetic field (IMF) […]

May 21, 2013 – “The Effects of Extreme Density Asymmetry on Magnetopause Reconnection Exhausts at High Latitudes”

Speaker:   Frederick Wilder (LASP)
Date:   May 21, 2013
Time:   4:00 PM
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

When the interplanetary magnetic field (IMF) is northward, reconnection between the IMF and geomagnetic field occurs at high latitudes, poleward of the cusp. In this region, there is a large flow-shear and density asymmetry across the magnetopause current sheet. We present observations from one magnetopause crossing by two of the Cluster spacecraft on 27 December […]

May 28, 2013 – “High Amplitude Whistler Waves and Spacecraft Potential Fluctuations on the Van Allen Probes”

Speaker:   David Malaspina (LASP)
Date:   May 28, 2013
Time:   4:00 PM
Location:   LASP Space Science Building, room N248 upstairs. Map
Abstract:  

Whistler-mode chorus are electromagnetic waves generated outside the plasmapause boundary when plasma sheet electrons are injected into Earth’s inner magnetosphere, creating temperature-anisotropic electron distributions unstable to wave growth. Wave-particle interactions then lead to acceleration and/or precipitation of radiation belt electrons. While low amplitude chorus (< 10 mV/m) may interact quasi-linearly, recently observed high amplitude chorus […]

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