Remote sensing of low-energy SEPs via charge exchange

H.S. Hudson, A. L. MacKinnon, Nigel Badnell

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

16 Downloads (Pure)


Charge-exchange reactions at high energies provide new channels for the remote sensing of solar high-energy particles, as demonstrated by the recent detection of 1.8-5 MeV hydrogen atoms from a solar flare [1]. Orrall and Zirker [2] had earlier proposed the detection of low-energy protons via charge-exchange atomic reactions in the solar atmosphere, leading in the simplest case to extended red-wing emission in the Lyman-alpha line. We discuss the analogous process for the He II 304 Å line (for alpha particles) and also assess the feasibility of the analogous process in the solar wind, whereby ambient He and (C, N, O) ions allow low-energy alpha particles to undergo resonant charge exchange in the ambient corona and thereby produce 304 Å wing emission close to the acceleration region.
Original languageEnglish
Title of host publicationSolar Wind 13
Subtitle of host publicationProceedings of the Thirteenth International Solar Wind Conference
EditorsGary P. Zank, Joe Borovsky, Roberto Bruno, Jonathan Cirtain, Steve Cranmer, Heather Elliott, Joe Giacalone, Walter Gonzalez, Gang Li, Eckart Marsh, Ebehard Moebius, Nick Pogorelov, Jim Spann, Olga Verkhoglyadova
Number of pages3
Publication statusPublished - 13 Jun 2013
Event13th International Solar Wind COnference - Sheraton Keauhou Resort, Big Island, Hawaii, United States
Duration: 17 Jun 201222 Jun 2012

Publication series

NameAIP Conference Proceedings
PublisherAIP Publishing
ISSN (Print)0094-243X


Conference13th International Solar Wind COnference
Abbreviated titleSolar Wind 13
Country/TerritoryUnited States
CityBig Island, Hawaii


  • flares
  • CMEs
  • solar energetic particles
  • remote sensing
  • uv spectroscopy
  • charge exchange


Dive into the research topics of 'Remote sensing of low-energy SEPs via charge exchange'. Together they form a unique fingerprint.

Cite this