Matt Hill Gang Li SHINE 2007 Session summary for Shock geometry & upstream and downstream phenomena 1-day session: Tuesday morning Tuesday afternoon.

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Presentation transcript:

Matt Hill Gang Li SHINE 2007 Session summary for Shock geometry & upstream and downstream phenomena 1-day session: Tuesday morning Tuesday afternoon

M. Lee: SEP Events, ESP Events and Shock Acceleration: Theory and Observations C. W. Smith: Upstream (downstream) wave phenomena at a CME-driven shock C. Cohen: Energetic particle spectra at interplanetary shocks R.Kalenbach: Upstream wave spectrum and its temporal evolution in gradual SEP events J. Giacalone: Reconciling Observed Spectra in SEP events with Diffusive Shock Acceleration: The Role of Large-Scale Turbulence Errol Summerlin: The Acceleration of Solar Wind and Pick-up Ions at Interplanetary Shocks G. Gloeckler: Ubiquitous v -5 spectra throughout Heliosphere

compressive turbulence divide population to (thermal) core and tail. the tail population will see an ensemble of rarefactions and compressions. the core ties to one density bump locally.

Cohen et al 2005 Heavy ion spectra shows a “shifting symmetry” Ng, Reames, and Tylka (2003) Break energy is ordered by (Q/A)  with  tightly related to upstream wave spectrum.

Temporal (spatial) superposition Ion escape by magnetic mirroring Presence of ambient energetic particles Sensitive role of proton-excited waves Exponential energy rollover Compression ratios; downstream evolution? I(k)?

Two days before the SHINE meeting, Chuck Smith sent an to Mihir Desai with the following content: “ Eureka, Eureka! I finally found out. ” Question: What did Chuck really found out?

different events seen by same s/c are different, same event seen by different s/c are same. particles accelerated at a shock will sample a variety of density jumps, not just a of local one => the compression ratio should be an average quantity.

Upstream power spectrum for the Jan. 20 th 2005 event Stochastic acceleration downstream CME shocks

Monte-Carlo simulation with FLM

His passport expires

Session focus: Identify and understand shock acceleration in large SEP events key question: is 1st order Fermi acceleration the major player for particle acceleration in large SEP events? Topics: upstream and downstream wave observations (or their absence) is large SEP events. morphology of particle spectra in large SEP events and its Q/A dependence. recent theoretical progresses in theoretical and modeling efforts of particle acceleration at interplanetary shocks. how shock acceleration depends on shock geometry

Title: MHD Simulations of Helmet Streamer Eruptions Author(s): Joel Allred (Drexel University), Peter MacNeice (Drexel University), Spiro Antiochos (Naval Research Lab) Title: The Evolution of Heavy Ion Spectra at Interplanetary Shock Passages Author(s): C.M.S.Cohen and R.A. Mewaldt (Caltech), G.M. Mason and G.C. Ho (JHU/APL), J.C. Kasper and J.D. Richardson (MIT), M.A. Lee (UNH) Title: Event-based CME-driven shock simulations: SEP abundances and low-beta shocks Author(s): D. Krauss-Varban, Y. Li, and J. G. Luhmann; Space Sciences Laboratory, University of California, Berkeley Title: MHD Simulation Outputs for SEP Event Modeling- an example from CISM Author(s): J.G. Luhmann, S. Ledvina, D. Krauss-Varban (SSL, UC Berkeley), D. Odstrcil (CIRES, U. of Colorado and NOAA/SEC), P. Riley (SAIC)

Title: First Results for He+ and He2+ From STEREO PLASTIC Author(s): H. Kucharek(1), M. Popecki(1), A. Galvin(1), B. Klecker(2), E. Moebius(1), C.F. Farrugia(1), L.M. Kistler(1), P. Bochsler(3), R. Karrer(3), A. Opitz(3), and K. Simunac(1). Title: Acceleration of Helium at Interplanetary Shocks Author(s): H. Kucharek (1), E. Moebius (1), F. Allegrini (2), M. I. Desai (2), B. Klecker (3), M.A. Popecki (1), A. B. Galvin (1), and P. Bochsler(4); Title: Multipoint Studies of Interplanetary Shocks with STEREO Author(s): C T Russell(1), L Jian(1), J G Luhmann(2),A Szabo(3), M Acuna(3),X Blanco-Cano(4); (1) UCLA;(2)UCB;(3)GSFC;(4)UNAM Title: Influence of large-scale interplanetary structures on energetic particle propagation: The September 2004 event at Ulysses and ACE Author(s): D. Lario (JHU/APL), R.B. Decker (JHU/APL)

Probing particle acceleration using heavy ion spectra C. Cohen

role of waves role of geometry seed population and injection compositional characteristics acceleration at a perp. shock, time scales Theory and Modeling: (M. Lee and J. Giacalone)