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Radtke R, Biedermann C, Fuchs T, et al. Measurement of the radiative cooling rates for high-ionization species of krypton using an electron beam ion trap. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 2000;61(2):1966-74doi: 10.1103/physreve.61.1966.
Radtke, R., Biedermann, C., Fuchs, T., Fussmann, G., & Beiersdorfer, P. (2000). Measurement of the radiative cooling rates for high-ionization species of krypton using an electron beam ion trap. Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 61(2), 1966-74. https://doi.org/10.1103/physreve.61.1966
Radtke, et al. "Measurement of the radiative cooling rates for high-ionization species of krypton using an electron beam ion trap." Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics vol. 61,2 (2000): 1966-74. doi: https://doi.org/10.1103/physreve.61.1966
Radtke R, Biedermann C, Fuchs T, Fussmann G, Beiersdorfer P. Measurement of the radiative cooling rates for high-ionization species of krypton using an electron beam ion trap. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 2000 Feb;61(2):1966-74. doi: 10.1103/physreve.61.1966. PMID: 11046483.
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Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 2000 Feb;61(2):1966-74. doi: 10.1103/physreve.61.1966.

Measurement of the radiative cooling rates for high-ionization species of krypton using an electron beam ion trap.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

Radtke, Biedermann, Fuchs, Fussmann, Beiersdorfer

Affiliations

  1. Max-Planck-Institut fur Plasmaphysik, Bereich Plasmadiagnostik, EURATOM Association, D-10117 Berlin, Germany.

PMID: 11046483 DOI: 10.1103/physreve.61.1966

Abstract

We describe a measurement of the radiative cooling rate for krypton made at the Berlin electron beam ion trap (EBIT). The EBIT was tuned to a charge-state distribution approaching the ionization balance of a plasma at a temperature of about 5 keV. To determine the cooling rate, we made use of EBIT's capabilities to sample a wide range of electron-beam energies and distinguish between different radiation channels. We have measured the x-ray emission from bremsstrahlung, radiative recombination, dielectronic recombination, and line radiation following electron-impact excitation. The dominant contribution to the cooling rate is made by the n=3-2, n=4-2, ellipsis x rays of the L-shell spectra of krypton, which produce more than 75% of the total radiation loss. A difference with theoretical calculations is noted for the measured total cooling rate. The predicted values are lower by a factor of 1.5-2, depending on the theoretical model. For our measurement of the cooling rate, we estimate an uncertainty interval of 22-30 %.

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