Absolute cross sections for electron-impact single ionization of Ne{sup q+} (q=2,4-6) ions

Journal Article · Wed May 01 04:00:00 EDT 1996 · Bulletin of the American Physical Society

OSTI ID:394229

Bannister, M E ^[1]

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1. Oak Ridge National Lab., TN (United States)

Absolute total cross sections for electron-impact single ionization of Ne{sup q+}(q = 2,4-6) ions have been measured using a crossed-beams technique from below the ground-state ionization threshold to 800 eV with typical total uncertainties near the peak of the cross sections ranging from 9% for Ne{sub 2+} to 13% for Ne{sup 6+}. Ionization cross sections for neon are critical in modeling and diagnosing the ITER tokamak since neon is a prime candidate impurity for radiation power exhaustion in the divertor. Details of the apparatus and experimental procedures used in this study are presented along with a discussion of the experimental uncertainties. The measured cross sections for all four ions are dominated by direct ionization and are in excellent agreement with the Lotz semiempirical formula. Ionization rate coefficients and fitting parameters calculated from the measured cross sections are also reported.

• DOE Contract Number: AC05-96OR22464
• OSTI ID: 394229
• Report Number(s): CONF-9605105--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 41; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CROSS SECTIONS
ELECTRON-ION COLLISIONS
EV RANGE 10-100
EV RANGE 100-1000
IONIZATION
NEON IONS