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Finding Order in ESP Events?

C.M.S. Cohen R.A. Mewaldt, G.M. Mason, J.C. Kasper, I.G. Richardson, M.A. Lee, G.C. Ho. Finding Order in ESP Events?. Introduction. Spring 2008 AGU Meeting: ESP spectral properties Selected events from Richardson list No CIRs, No SEP injections, Valid parameters 30 shocks

nicholas-schneider
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Finding Order in ESP Events?

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  1. C.M.S. Cohen R.A. Mewaldt, G.M. Mason, J.C. Kasper, I.G. Richardson, M.A. Lee, G.C. Ho Finding Order in ESP Events?

  2. LWS Team Meeting Introduction • Spring 2008 AGU Meeting: ESP spectral properties • Selected events from Richardson list • No CIRs, No SEP injections, Valid parameters • 30 shocks • Examined ULEIS hourly O intensities • Selected events with clear 0.5 MeV/n peak within 2 hrs. after shock passage • 15 events • Combined ULEIS+SIS spectra • Fit with E-R form to get break points for He-Fe • Examined Q/M dependences • Examined Ebreak(O) dependence on shock parameters

  3. LWS Team Meeting AGU Results • Issues • ULEIS-SIS mismatch • Missing SIS data • ‘Bad’ fits = pre-event intensity • Resolutions • ULEIS corr. for saturation • ?? • Attempt to subtract pre-event intensity But for the AGU, I decided to press on…

  4. LWS Team Meeting Oxygen Ebreakvs shock parameters No Correlations

  5. LWS Team Meeting Q/M Dependences Not systematic, Fe sometimes different

  6. LWS Team Meeting Q/M power-law index correlations No Correlations

  7. LWS Team Meeting ULEIS Saturation Wind/STEP used to determine He/CNO and then replace ULEIS He with scaled ULEIS O spectrum

  8. LWS Team Meeting Pre-event intensity corrections O • Increases not always seen in SIS data • Increases not always seen at same time in ULEIS+SIS data • Selection via O yields different events than selection via He • Pre-shock peaks? • Integration times? He

  9. LWS Team Meeting Pre-event intensity corrections O • Increases not always seen in SIS data • Increases not always seen at same time in ULEIS+SIS data • Selection via O yields different events than selection via He • Pre-shock peaks? • Integration times? He

  10. LWS Team Meeting Pre-event intensitycorrections O • Increases not always seen in SIS data • Increases not always seen at same time in ULEIS+SIS data • Selection via O yields different events than selection via He • Pre-shock peaks? • Integration times? He

  11. LWS Team Meeting Event selection issues (current) • How to select events? • Peak-shock timing • Okay to be before shock arrival (how much)? • How much after shock arrival is okay? • With what tolerance do energies need to peak together? • Increases • How much is required? • At what energy? • For what element? • Background • How to determine? • How to subtract?

  12. LWS Team Meeting Why different responses? • Shock 1 • V=733, R=2.17, Th=78 • Shock 2 • V=734, R=2.81, Th=51

  13. LWS Team Meeting Why different responses? • Shock 1 • V=733, R=2.17, Th=78 • Shock 2 • V=734, R=2.81, Th=51

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