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

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

2 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

3 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.

4 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.

5 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)?

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

7 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.

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

9 Monte-Carlo simulation with FLM

10 His passport expires

11 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

12 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)

13 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)

14

15 Probing particle acceleration using heavy ion spectra C. Cohen

16 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)


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