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

Conference · Mon Jul 01 04:00:00 EDT 1996

OSTI ID:253346

Ruiz, C L ^[1]; Cooper, G W; Chambers, G ^[2]; Schmidlapp, F A ^[3]

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1. Sandia National Labs., Albuquerque, NM (United States)
2. New Mexico Univ., Albuquerque, NM (United States)
3. Ktech Corp., Albuquerque, NM (United States)

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.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 253346
• Report Number(s): SAND--96-0608C; CONF-960543--23; ON: DE96011722
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BORON 10 REACTIONS
ENERGY DENSITY
FLUORINE 19 REACTIONS
INERTIAL CONFINEMENT
INERTIAL FUSION DRIVERS
ION BEAM FUSION REACTORS
LITHIUM 7 BEAMS
LITHIUM 7 REACTIONS
PARTICLE BEAM FUSION ACCELERATOR