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Team II Summary

Team II Summary. From Photons to Particles and Beyond RHESSI-NESSI: June 4-6, 2003. Motivation: 23 July 2003, 00:30:00 - 00:30:20. Solid: Holman et al. forward fit Boxes: Piana et al. 0th order regularization. 5.5 r difference. Qualities of a “good” electron spectrum.

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Team II Summary

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  1. Team II Summary From Photons to Particles and Beyond RHESSI-NESSI: June 4-6, 2003

  2. Motivation: 23 July 2003, 00:30:00 - 00:30:20 • Solid: Holman et al. forward fit • Boxes: Piana et al. 0th order regularization 5.5r difference

  3. Qualities of a “good” electron spectrum • Must correspond to a “good” fit to the photon spectrum • Should contain as little a priori “information” as possible consistent with what is known about the physics of the emission process

  4. Photon Fits and ResidualsRegularized Method; =2.45

  5. Photon Fits and ResidualsThermal plus Double-Power-Law Forward Fit

  6. Residuals - Matrix Inversion

  7. (R_TEST is an IDL procedure)

  8. Smoothing the residuals

  9. Smoothing the residuals

  10. Results Comparison: 23 July 2003, 00:30:00 - 00:30:20 • White: Johns & Lin (1992) • Red: Piana et al. 0th order regularization

  11. Pileup Corrections:

  12. Pileup Corrections: Pileup Corrections: Note: not fully consistent as forward fit was not done to corrected photon spectrum

  13. Effects of Albedo II: Following Bai and Ramaty (1978) No albedo correction With albedo correction

  14. Johns & Lin (1992) Cross Sections • Koch & Motz 1959, Rev. Modern Physics, 31, 920 • See also erratum to Johns & Lin 1992, Sol. Phys., 142, 219

  15. Action Items: • Re-write bremspec in SSW - most accurate cross-section, e-n, e-i, e-e • Optimize binning of Johns & Lin and translate to IDL with user friendly interface in SSW • Implement rectangular form of regularization • Put regularized inversions in SSW • Mote Carlo simulations to evaluate significance of clustering in fit residuals • Analyze more sources and times

  16. Direction inconsistent with bulk motion on vertical magnetic fields, but is consistent with albedo contribution

  17. Effects of Albedo and Non-constant Ionization Structure

  18. „Cutoff“ model: „Kink“ model: Effects of Albedo and Non-constant Ionization Structure

  19. Vilmer et al. White: RHESSI 25-50 keV Hard X-rays Black: RHESSI 12-25 keV Soft X-rays

  20. NRH 327 MHz during 4 bursts Between 131120 and 131140 RHESSI 25-50 keV

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