Measurement of hydrogen and lithium ion energy densities on PBFA II using direct nuclear activation diagnostics

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In the light-ion-beam fusion program at Sandia National Laboratories an intense lithium beam is being developed to drive inertial confinement fusion targets. An important issue is the purity of the beam. To assess this concern, direct nuclear activation diagnostics based on the reactions {sup 7}Li(p,n){sup 7}Be, {sup 10}B(p, {alpha}){sup 7}Be, and {sup 19}F({sup 7}Li,d){sup 24}Na were fielded to measure the energy densities of hydrogen and lithium in the beam. The hydrogen beam energy density was measured to be less than 2% of the lithium beam energy density on a majority (10) of the 19 LiF anode shots taken and was ... continued below

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16 p.

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Ruiz, C.L.; Cooper, G.W.; Chambers, G. & Schmidlapp, F.A. July 1, 1996.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

In the light-ion-beam fusion program at Sandia National Laboratories an intense lithium beam is being developed to drive inertial confinement fusion targets. An important issue is the purity of the beam. To assess this concern, direct nuclear activation diagnostics based on the reactions {sup 7}Li(p,n){sup 7}Be, {sup 10}B(p, {alpha}){sup 7}Be, and {sup 19}F({sup 7}Li,d){sup 24}Na were fielded to measure the energy densities of hydrogen and lithium in the beam. The hydrogen beam energy density was measured to be less than 2% of the lithium beam energy density on a majority (10) of the 19 LiF anode shots taken and was always less than 10%. The total hydrogen energy in the beam ranged from only 0.5 to 10 kilojoules. Over this shot series increasing efforts were made to clean the anode prior to each shot. In general, there was a modest reduction in the hydrogen energy fraction with improved cleaning, but no corresponding increase in the lithium energy density was seen. The lithium energy density as a function of location was also measured and found to typically very by factors of 1.5 to 4 over the diode.

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16 p.

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INIS; OSTI as DE96011722

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  • 11. annual high-temperature plasma diagnostics conference, Monterey, CA (United States), 12-16 May 1996

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  • Other: DE96011722
  • Report No.: SAND--96-0608C
  • Report No.: CONF-960543--23
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 253346
  • Archival Resource Key: ark:/67531/metadc666547

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  • July 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • April 13, 2016, 2:48 p.m.

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Ruiz, C.L.; Cooper, G.W.; Chambers, G. & Schmidlapp, F.A. Measurement of hydrogen and lithium ion energy densities on PBFA II using direct nuclear activation diagnostics, article, July 1, 1996; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc666547/: accessed January 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.