[IGPP Everyone] SEMINAR SERIES FALL 2019 BEGINS : October 4th, 2019!

[MARCO VELLI]

SPACE PHYSICS SEMINAR

DEPARTMENT OF EARTH, PLANETARY, AND SPACE SCIENCES

DEPARTMENT OF ATMOSPHERIC AND OCEANIC SCIENCES

UNIVERSITY OF CALIFORNIA, LOS ANGELES


*Propagation of Alfven Waves in a Two Ion Species Plasma*


Jeffrey Robertson, UCLA


Understanding the behavior of plasma waves in mixed-species plasmas is
important for explaining many observations seen in both space and
laboratory plasmas. The addition of a second ion species in a magnetized
plasma introduces new behavior in the propagation of waves in the ion
cyclotron region, such as the ion-ion hybrid cutoff frequency for parallel
propagating shear Alfven waves [1]. Previous experiments on the Large
Plasma Device (LAPD) have demonstrated the existence of a propagation gap
for shear waves between the ion cyclotron frequencies of the two ion
species [2], while more recent work has expanded the range of plasma
conditions in which this was observed. Additionally, the ion-ion hybrid
cutoff is documented for various mix ratios in order to determine its
viability as a diagnostic for the ratio of ion densities. `


Friday, October 4th, 2019


Room 6704 Geology


3:30 - 5:00 PM


In Charge

M. Velli.
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