AASERT-92 Grant 'X-Rays from High-Intensity, Short-Pulse Interactions'.
Abstract
We demonstrated a novel sources of pulsed terahertz radiation and x rays which have ultrashort pulse duration and high intensity; this source is based on emission from ultrashort, laser heated gases and solids. We have examined the propagation of high intensity (up to 1019 W/cm2) ultrashort (100 fs) laser pulses in dense gases; this work has application to variety of studies involving high power laser pulses such as harmonic generation x ray lasers and laser wakefield accelerators. We studied schemes for new x ray lasers. They involve rapid recombination of highly ionized atoms (produced by multiphoton ionization) bellowed by lasing on Ly-alpha x-ray transitions. We developed a new Thomson scattering technique using multiple, ultrashort laser pulses; these studies were done in multiphoton ionized plasmas of interest to the construction of new x ray lasers. We have examined conditions for pumping recombination x-ray lasers using multiphoton ionized -gases. We have examined the non-Maxwellian energy distributions in multi photon ionized gases. Finally, we examined both the coherent and incoherent emission from short pulse laser excited clusters. This latest work has established that sub-wavelength sized clusters can be a source of intense plasma emission. and that the clusters are a source of harmonics from laser matter interaction.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1996
- Accession Number
- ADA323264
Entities
People
- Roger W. Falcone
Organizations
- University of California, Berkeley