High Resolution Recombination Measurements of Stored Ions

The accuracy obtained in electron-ion recombination experiments at storage rings has reached a level which allows strenuous tests of theoretical models and the ability to derive accurate, and useful, information for applications such as plasma modeling and diagnostics. Here we present two such recom...

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Bibliographic Details
Main Authors: Fogle, M., Ekloew, N., Lindroth, E., Madzunkov, S., Mohamed, T., Schuch, R., Tokman, M., Badnell, N.
Format: Conference Proceeding
Language:English
Subjects:
ACCURACY
ELECTRON-ION COLLISIONS
EV RANGE 01-10
HEAVY IONS
ION BEAMS
MEV RANGE 01-10
PARTICLE ACCELERATORS
PLASMA
QUANTUM ELECTRODYNAMICS
RECOMBINATION
RESOLUTION
SPIN ORIENTATION
STORAGE RINGS
TEMPERATURE DEPENDENCE
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Summary:The accuracy obtained in electron-ion recombination experiments at storage rings has reached a level which allows strenuous tests of theoretical models and the ability to derive accurate, and useful, information for applications such as plasma modeling and diagnostics. Here we present two such recombination experiments performed at the heavy ion storage ring CRYRING. First, we investigated the possibility to derive a temperature dependent plasma rate coefficient for Na-like Ni, which has been observed in emission lines from active solar regions and laboratory plasmas. Second, we determined the 2s1/2-2p1/2 energy splitting in Li-like Kr. Such a highly charged ion exhibits large QED contributions ({approx}1.5 eV) which are difficult to represent in theoretically calculations. The experimental value for the splitting was determined to within 8 meV while the theoretically determined value is only accurate to within 19 meV.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.1619687