Investigation of Laser Based Thomson Scattering

With an interest in designing a Thomson scattering experiment based on laser interactions with solid-density materials, we have explored the effects of prepulses on preplasma conditions and the effects of preplasma conditions on harmonic generation and absorption. We have established that the necessary contrast exists in the HERCULES laser to conduct solid density experiments with samples as tin as 20 m. We have correlated electron acceleration from solid targets with HHG and analyzed the electron and photon spectra. We have developed new targets for solid density work using liquid targets. As a result of considering these efforts we conclude that the mechanism for driving electrons from solids is not presently as reliable as laser wakefield acceleration in gases and that further exploration of laser liquid interaction has the potential to provide sources of energetic ions and fission products such as neutrons. The development of strong Thomson scattering sources from solid density targets needs some other invention to make it competitive.Finally, we have demonstrated scintillator and knock-on diagnostics for laser generated gamma rays.