Actions for Quantifying Spot Size Reduction of a 1.8 kA Electron Beam for Flash Radiography [electronic resource].

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Quantifying Spot Size Reduction of a 1.8 kA Electron Beam for Flash Radiography [electronic resource].

Published
Washington, D.C. : United States. National Nuclear Security Administration, 2018.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
Article numbers 104,905 : digital, PDF file
Additional Creators
Los Alamos National Laboratory, United States. National Nuclear Security Administration, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The spot size of Axis-I at the Dual Axis Radiographic Hydrodynamic Test facility was reduced by 15.5% by including a small diameter drift tube that acts to aperture the outer diameter of the electron beam. Comparing the measured values to both analytic calculations and results from a particle-in-cell model shows that one-third to one-half of the spot size reduction is due to a drop in beam emittance. We infer that one-half to two-thirds of the spot-size reduction is due to a reduction in beam-target interactions. Sources of emittance growth and the scaling of the final focal spot size with emittance and solenoid aberrations are also presented.
Report Numbers
E 1.99:la-ur--17-30660
la-ur--17-30660
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Note
Published through SciTech Connect.
03/14/2018.
"la-ur--17-30660"
Journal of Applied Physics 123 10 ISSN 0021-8979; 1089-7550 (Electronic) AM
Trevor John Burris-Mog; David C. Moir.
Funding Information
AC52-06NA25396
View MARC record | catkey: 23502954