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

4. 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

6. Photon Fits and Residuals Regularized Method; =2.45

7. Photon Fits and Residuals Thermal plus Double-Power-Law Forward Fit

8. Residuals - Matrix Inversion

9. (R_TEST is an IDL procedure)

10. Smoothing the residuals

11. Smoothing the residuals

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

14. Pileup Corrections:

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

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

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

18. 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

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

23. Effects of Albedo and Non-constant Ionization Structure

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

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

26. NRH 327 MHz
during 4 bursts
Between and
RHESSI
25-50 keV