A combined thermal dissociation and electron impact ionization source for RIB generation

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The probability for simultaneously dissociating and efficiently ionizing the individual atomic constituents of molecular feed materials with conventional, hot-cathode, electron-impact ion sources is low and consequently, the ion beams from these sources often appear as mixtures of several molecular sideband beams. This fragmentation process leads to dilution of the intensity of the species of interest for RIB applications where beam intensity is at a premium. We have conceived an ion source that combines the excellent molecular dissociation properties of a thermal dissociator and the high ionization efficiency characteristics of an electron impact ionization source that will, in principle, overcome this ... continued below

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11 p.

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Alton, G.D. & Williams, C. December 31, 1995.

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Description

The probability for simultaneously dissociating and efficiently ionizing the individual atomic constituents of molecular feed materials with conventional, hot-cathode, electron-impact ion sources is low and consequently, the ion beams from these sources often appear as mixtures of several molecular sideband beams. This fragmentation process leads to dilution of the intensity of the species of interest for RIB applications where beam intensity is at a premium. We have conceived an ion source that combines the excellent molecular dissociation properties of a thermal dissociator and the high ionization efficiency characteristics of an electron impact ionization source that will, in principle, overcome this handicap. The source concept will be evaluated as a potential candidate for use for RIB generation at the Holifield Radioactive Ion Beam Facility (HRIBF), now under construction at the Oak Ridge National Laboratory. The design features and principles of operation of the source are described in this article.

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11 p.

Notes

INIS; OSTI as DE96005476

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  • 6. international conference on ion sources, Whistler (Canada), 10-16 Sep 1995

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  • Other: DE96005476
  • Report No.: CONF-9509125--20
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 206645
  • Archival Resource Key: ark:/67531/metadc669962

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 31, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Jan. 25, 2016, 4:34 p.m.

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Alton, G.D. & Williams, C. A combined thermal dissociation and electron impact ionization source for RIB generation, article, December 31, 1995; Tennessee. (digital.library.unt.edu/ark:/67531/metadc669962/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.