1 / 16

Matt Hill Gang Li

SHINE 2007. Session summary for. Shock geometry & upstream and downstream phenomena. 1-day session: Tuesday morning Tuesday afternoon. Matt Hill Gang Li. G. Gloeckler: Ubiquitous v -5 spectra throughout Heliosphere.

lena
Download Presentation

Matt Hill Gang Li

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


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

  2. G. Gloeckler: Ubiquitous v-5 spectra throughout Heliosphere 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 M. Lee: SEP Events, ESP Events and Shock Acceleration: Theory and Observations 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

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

  5. I(k)? • 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?

  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. 20th 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 EruptionsAuthor(s): Joel Allred (Drexel University), Peter MacNeice (Drexel University), Spiro Antiochos (Naval Research Lab) Title: The Evolution of Heavy Ion Spectra at Interplanetary Shock PassagesAuthor(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 shocksAuthor(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 CISMAuthor(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 PLASTICAuthor(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 ShocksAuthor(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 STEREOAuthor(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 ACEAuthor(s): D. Lario (JHU/APL), R.B. Decker (JHU/APL)

  14. Probing particle acceleration using heavy ion spectra C. Cohen

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

More Related