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

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147864· OSTI ID:451743

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

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1. Department 9577, Sandia National Laboratories, Albuquerque, New Mexico 87185-5800 (United States)
2. Chemical and Nuclear Engineering Department, University of New Mexico, Albuquerque, New Mexico 87106 (United States)
3. Ktech Corporation, Albuquerque, New Mexico 87110 (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{percent} of the lithium beam energy density on a majority (10) of the 19 LiF anode shots taken and was always less than 10{percent}. The total hydrogen energy in the beam ranged from only 0.5{endash}10 kJ. 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 vary by factors of 1.5{endash}4 over the diode. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Sandia National Laboratory
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 451743
• Report Number(s): CONF-960543--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 68; ISSN RSINAK; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM DYNAMICS
BERYLLIUM 10 TARGET
CHARGE-EXCHANGE REACTIONS
ENERGY DENSITY
FLUORINE 19 TARGET
HYDROGEN IONS
INERTIAL CONFINEMENT
ION BEAMS
LITHIUM
LITHIUM 7 BEAMS
LITHIUM 7 REACTIONS
LITHIUM 7 TARGET
LITHIUM FLUORIDES
LITHIUM IONS
NEUTRON ACTIVATION ANALYSIS
PARTICLE BEAM FUSION ACCELERATOR
PROTON BEAMS
PROTON REACTIONS
THERMONUCLEAR REACTOR MATERIALS