Energetic Particle Acceleration at CME-driven Shocks

ROSES ID: NRA-02-OSS-01      Selection Year: 2003      

Program Element: Independent Investigation: LWS

Principal Investigator: David Lario

Affiliation(s): Applied Physics Laboratory

Project Member(s):
Smith, Charles W COI University of Delaware
Ho, George C COI JHU/APL
Decker, Robert Blair COI JHU/APL
Desai, Mihir Collaborator University of Maryland College Park

Summary:

We propose a three year program to analyze the energetic particle signatures produced by interplanetary shocks driven by coronal mass ejections (CMEs) at their arrival at 1 AU. We will use data from the magnetometers and solar wind experiments on board the Advanced Composition Explorer (ACE) and the Interplanetary Monitoring Platform (IMP-8) to determine the physical characteristics of such shocks (i.e., strength, normal vector orientation, Mach Number, magnetic compression ratio, and speed). In order to determine the effects that shocks have on energetic particle population, we will use energetic particle data from the Charged Particle Measurements Experiment (CPME) and Energetic Particle Experiment (EPE) on board IMP-8, the Energetic Proton Alpha Monitor (EPAM) and Ultra Low Energy Isotope Spectrometer (ULEIS) on board ACE, and the Energetic Particle Sensor (EPS) on board the Geostationary Operational Environmental Satellites (GOES). The large angular coverage and high-time resolution of ACE/EPAM will allow us to study the anisotropy flow of energetic ions in both the upstream and downstream regions of the shocks. The high-time resolution of the magnetometer on ACE will allow us to determine the level and frequencies of hydromagnetic wave turbulence associated with the shocks or generated by the energetic particles. The high sensitivity of ACE/ULEIS will allow us to determine the elemental abundances of the energetic particle enhancements observed in association with the shocks. We will correlate shock characteristics with the energetic particle effects. We will perform detail analyses of the most intense events and distinguish those events consistent with predictions of the current shock acceleration theories and those events in which additional mechanisms play important roles, such as trapping of particles around the shock, and/or contribution of additional sources of particles. We will also use an existing simulation model to understand the effects that the shock structure, the upstream medium and seed particle population have on the formation of ESP events. We will determine (1) the acceleration mechanisms working at the CME-driven shocks; (2) the seed particle population of the ESP events; (3) the energy gained by this seed particle population; (4) the effects of magnetic structures formed in the upstream and downstream regions of the shocks; and (5) the origin, characteristics, and effects of the hydromagnetic wave turbulence associated with the shocks.

Publications:

Performance Year	Reference	Investigation Type	Actions
1	Lario, David   JHU/APL -  Energetic Particle Acceleration ...	not set
1	Lario D.; Ho G. C.; Decker R. B.; Roelof E. C.; Desai M. I.;...	Data Analysis
1	Ho G. C.; Lario D.; Decker R. B.; Roelof E. C.; Desai M.; Sm...	Data Analysis
2	Lario D.; Decker R. B.; Roelof E. C.; Reisenfeld D. B.; Sand...	Data Analysis
2	Lario D.; Hu Q.; Ho G. C.; Decker R. B.; Roelof E. C.; Smith...	Data Analysis
2	Ho G. C.; Lario D.; Decker R. B.; Desai M. I.; Hu Q.; Kasper...	Data Analysis
3	Lario D.; Decker R. B.; Ho G. C.; Hu Q.; Smith C. W.; Desai ...	Data Analysis
3	Neugebauer M.; Giacalone J.; Chollet E.; Lario D.; (2006). V...	Data Analysis
3	Zank G. P.; Li G.; Florinski V.; Hu Q.; Lario D.; Smith C. W...	Data Model Comparison
4	Lario D.; Aran A.; Agueda N.; Sanahuja B.; (2007). Radial de...	Data Model Comparison
4	Ho G. C.; Lario D.; Decker R. B.; Smith C. W.; Hu Q.; (2008)...	Data Analysis
4	Lario D.; Decker R. B.; Malandraki O. E.; Lanzerotti L. J.; ...	Data Analysis
4	Agueda N.; Vainio R.; Lario D.; Sanahuja B.; (2008). Injecti...	Data Model Comparison

Presentations:

Performance Year	Reference	Actions
1	Lario, D.; Decker, R. B.; Malandraki, O. E.; Lanzero...
1	Agueda, Neus; Vainio, Rami; Lario, David; Sanahuja, B...

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