Signatures of proton beams in the Ly-alpha profile: sensitivity of the diagnostics
Abstract
We modelled the effects on the Ly-alpha emission caused by an accelerated proton beam impacting onto the chromosphere to estimate its detection threshold as an effective diagnostics for protons. Chosen a model chromosphere and a HI model atom with 3 bound levels plus a continuum, we computed the background Ly-alpha flux profile and the superthermal contribution in the red wing due to the beam. The profiles computed for different model parameters show that a source with a radius exceeding 1000 km and producing a total proton flux greater than 5 x 10^10 erg cm^-2 s^-1 should be detectable in irradiance observations.
- Publication:
-
Advances in Solar Physics
- Pub Date:
- 1994
- DOI:
- 10.1007/3-540-58041-7_229
- Bibcode:
- 1994LNP...432..279M