Solar Wind Charge Exchange Studies Of Highly Charged Ions On Atomic Hydrogen

Journal Article · Wed Jun 01 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3586067· OSTI ID:21513336

Draganic, I N; Havener, C C ^[1]; Seely, D G ^[2]; McCammon, D ^[3]

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1. Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States)
2. Department of Physics, Albion College, Albion, MI 49224 (United States)
3. Department of Physics, University of Wisconsin, Madison, WI 53706 (United States)

Accurate studies of low-energy charge exchange (CX) are critical to understanding underlying soft X-ray radiation processes in the interaction of highly charged ions from the solar wind with the neutral atoms and molecules in the heliosphere, cometary comas, planetary atmospheres, interstellar winds, etc.. Particularly important are the CX cross sections for bare, H-like, and He-like ions of C, N, O and Ne, which are the dominant charge states for these heavier elements in the solar wind. Absolute total cross sections for single electron capture by H-like ions of C, N, O and fully-stripped O ions from atomic hydrogen have been measured in an expanded range of relative collision energies (5 eV/u-20 keV/u) and compared to previous H-oven measurements. The present measurements are performed using a merged-beams technique with intense highly charged ion beams extracted from a 14.5 GHz ECR ion source installed on a high voltage platform at the Oak Ridge National Laboratory. For the collision energy range of 0.3 keV/u-3.3 keV/u, which corresponds to typical ion velocities in the solar wind, the new measurements are in good agreement with previous H-oven measurements. The experimental results are discussed in detail and compared with theoretical calculations where available.

• OSTI ID: 21513336
• Journal Information: AIP Conference Proceedings, Vol. 1336, Issue 1; Conference: CAARI 2010: 21. International Conference on the Application of Accelerators in Research and Industry, Fort Worth, TX (United States), 8-13 Aug 2010; Other Information: DOI: 10.1063/1.3586067; (c) 2011 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CHARGE EXCHANGE
CHARGE STATES
ECR ION SOURCES
ELECTRON CAPTURE
EV RANGE
GHZ RANGE
HELIOSPHERE
HYDROGEN
INTERACTIONS
ION BEAMS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
KEV RANGE 01-10
ORNL
OXYGEN IONS
PLANETARY ATMOSPHERES
SOFT X RADIATION
SOLAR WIND
TOTAL CROSS SECTIONS
ATMOSPHERES
ATOM COLLISIONS
BEAMS
CAPTURE
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY RANGE
FREQUENCY RANGE
ION COLLISIONS
ION SOURCES
IONIZING RADIATIONS
IONS
KEV RANGE
MOLECULE COLLISIONS
NATIONAL ORGANIZATIONS
NONMETALS
RADIATIONS
SOLAR ACTIVITY
SOLAR ATMOSPHERE
STELLAR ACTIVITY
STELLAR ATMOSPHERES
STELLAR WINDS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
X RADIATION