Remote sensing of low-energy SEPs via charge exchange

Hudson, H.S. , MacKinnon, A.L. and Badnell, N.R. (2013) Remote sensing of low-energy SEPs via charge exchange. In: Thirteenth International Solar Wind Conference, Big Island, HI, USA, 17–22 June 2012, pp. 19-21. (doi: 10.1063/1.4810979)

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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.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Hudson, Dr Hugh and MacKinnon, Dr Alexander
Authors: Hudson, H.S., MacKinnon, A.L., and Badnell, N.R.
College/School:College of Science and Engineering > School of Physics and Astronomy
College of Social Sciences > School of Education

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
542081Rolling Programme in Solar and Plasma AstrophysicsLyndsay FletcherScience & Technologies Facilities Council (STFC)ST/I001808/1P&A - PHYSICS & ASTRONOMY