Overview of MEGa-ray-based Nuclear Materials Management Activities at the Lawrence Livermore National Laboratory
Abstract not provided
42 ENGINEERING↗
Engineering topics
Houck, T
Publications and source records attributed to Houck, T.
High energy photocathodes for laser fusion diagnostics
Laser fusion experiments at the National Ignition Facility require time-resolved x-ray images of the ignition target self-emission. The photon energies are expected to be greater than 10 keV. Photoemission quantum yield measurement data and photoelectron energy spectrum data are presently unavailable in this photon energy range, but are essential in the design of x-ray imaging diagnostics. We developed an apparatus to measure the quantum efficiency of primary and secondary photoelectron emission and to estimate the energy spectrum of the secondary photoelectrons. The apparatus has been tested using photon energies less than 10 keV to allow comparisons with prior work. A method for preparing photocathodes with geometrically enhanced photoefficiency has been developed.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗