Two experiments have been performed to investigate heating
by high-intensity laser-generated electrons, in the context of
studies of the fast ignitor approach to inertial confinement fusion
(ICF). A new spectrometer and layered targets have been used to detect
Kα emission from aluminum heated by a fast electron beam.
Results show that a temperature of about 40 eV is reached in solid
density aluminum up to a depth of about 100 μm.