General Seminars

Channeling, Volume Reflection, Gamma-ray Production and Acceleration: The Potential of Crystals for Manipulating Electron Beams of High Energy and Intensity

by Dr. Wienands Hans-Ulrich (Stanford University SLAC National Accelerator Laboratory Stanford, California, USA)

Wednesday, 22 April 2015 from to (Europe/Bucharest)
at National Library of Physics
Description Recently, a campaign to measure channeling and volume-reflection effects with multi-GeV electron and positron beams in crystals has gained momentum at SLAC. Experiments of an international SLAC-Aarhus-California State Polytechnic-Ferrara collaboration have yielded data on electron channeling as well as the volume reflection process in a little-explored energy range that challenge some of the energy-scaling relations used up to now. With a group from the U. of California at Irvine joining the collaboration an important aspect – that of the possibility of using crystals or other ordered materials as a medium for wakefield acceleration – will be explored in the coming years, besides the study of g-ray production at potentially
high intensity and narrow energy bandwidth. One possible means of exciting the wakefields necessary for acceleration will be using extreme-power short-pulse X-ray laser beams which
could potentially be generated at ELI-NP. At SLAC, the MEC facility at LCLS (Matter in Extreme Conditions) also has some potential to produce laser pulses of interesting intensity for such experiments.

I will report on the results of our experiment so far, discuss the wakefield acceleration parameters and also describe the MEC facility at LCLS.