Group Leader: Mark McConnell
Co-Leader: Eduard Kontar
Measurements of the polarization, directivity and albedo of the solar flare hard X-ray flux can all be related to the angular distribution of the accelerated electrons. Our group will focus on what the these measurements can tell us about the nature of the electron acceleration process. We will consider the potential of these types of observations and evaluate what constraints the available data already place on acceleration models. Our work will focus on the following :
- How do beaming measurements impact our understanding of the acceleration process?
- How do albedo measurements constrain the beaming of the accelerated particles?
- A review of existing albedo measurements.
- How do polarization measurements constrain the beaming of the accelerated particles?
- A review of existing polarization measurements.
- Prospects for future investigations.
Monday, August 2
4:00 – 5:30 PM : X-Ray Albedo and Directivity
- Introductory Remarks (McConnell)
- Theoretical review of solar albedo (Kontar)
- Observations of Directivity (Dickson)
Tuesday, August 3
11:00 – 12:30 PM : Particle Acceleration and Beaming (JOINT SESSION WITH WG 6)
- Relationship of beaming to acceleration models (Emslie)
Wednesday, August 4
11:00 – 12:30 PM : X-Ray Footpoints
- Visibilities and the lack of modulation in the finer grids (Hurford)
- Footpoint size measurements (Dennis)
- Effect of albedo on footpoint size (Kontar)
- Theoretical & Observed Footpoint Sizes (Battaglia)
- Comparison with EUV / Optical (Fletcher)
2:00 – 3:30 PM : X-Ray Polarization
- Review of polarization measurements (McConnell)
- Review of polarization theory (Zharkova)
4:00 – 5:30 PM : Summary Discussion
- Review and discussion (McConnell / all)