seed population for particle acceleration ... anywhere in the universe
DESCRIPTION
Seed Population for Particle Acceleration ... Anywhere in the Universe. Shock heating based on many factors: v shock : shock speed Bn : magnetic field angle to shock normal : ratio of thermal and magnetic pressure M A : Alfvenic mach number Mass to charge ratio - PowerPoint PPT PresentationTRANSCRIPT
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Seed Population for Particle Acceleration ... Anywhere in the Universe
Shock heating based on many factors:1. vshock: shock speed2. Bn: magnetic field angle to shock
normal3. : ratio of thermal and magnetic
pressure4. MA: Alfvenic mach number5. Mass to charge ratio6. Plasma waves/instabilities7. Compression ratio8. Equilibration between species: Te/Tp
Ions studied seem to vary by shockMass proportional heating in Supernova Remnant (SNR)Greater than mass proportional heating in Interplanetary shocks
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Decreasing heating with increasing beta
Heating in collisionless shocks
Higher M/Q more heating
No apparent trend with Mach
number
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Summary for heavy ion heating
• Shock heating often has a strong M/Q dependence
• Perpendicular shocks impart a larger fraction of energy to heavies
• The heating rate does not depend on Mach number, but upstream proton
• Trends can be applied to other astrophysical shocks to predict magnetic field
Would like to acknowledge ACE SWICS, MAG, SWEPAM.J. Raines for analysis support