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He3 and/or electron rich events

SHINE 2007. He3 and/or electron rich events. Question:. What is the underlying acceleration mechanism in impulsive SEP events now that observations show electron He3 and Ultra heavy ions are greatly enhanced in these events?. Answer:

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He3 and/or electron rich events

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  1. SHINE 2007 He3 and/or electron rich events Question: What is the underlying acceleration mechanism in impulsive SEP events now that observations show electron He3 and Ultra heavy ions are greatly enhanced in these events? Answer: We still do not know, but a full-day session next year may help.

  2. G. Mason:Recent Progress in Understanding 3He-rich SEP Events V. Petrosian: Electron and ion acceleration in solar flares by turbulence I. Roth: Energization of Coronal Rare Elements - direct association to impulsive electrons? L.H. Wang: Timing studies of electrons and its implication on He3 and electron rich event H. Cane THE SOLAR ENERGETIC PARTICLE EVENT ZOO

  3. From observations: • Enhancement of He3/He4 ~10^4. • different spectrum of He3 • Heavy ions and UH enhancement. • Source of acceleration • Timing constraint. no single model addresses electrons, 3He, heavy nuclei & UH nuclei

  4. Electron flux B Oblique Emic waves k B 3He, Fe, X, Kr I. Roth Oblique EM Cyclotron wave Vahe Petrosian Stochastic acceleration Both can explain selective acceleration of 3He, work for ions to some extends. stochastic acceleration accelerate electrons simultaneous with ions. Oblique EMIC waves are stimulated by electron beams shooting down.

  5. Impulsive SEP events Type III burst high-energy electrons Acceleration low-energy electrons low-energy ions (3He-rich) t Propagation and timing study Dialogue from participants: Ilan: more data is needed to better understand these impulsive SEP events. Allan: No. It is not data what we need, but theory!

  6. New classification of SEP events: (H. Cane) SEP events are complex. The major determining factors are the amount of magnetic energy, the topology of the magnetic field surrounding the flare/CME, and the magnetic connection of the observer.

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