Diagnostics for a fourth generation light source

Alan Wootton
Lawrence Livermore National Laboratory
October 23, 2001

Abstract:
A new light source is being developed, the Linac Coherent Light Source (LCLS). It will produce photons in 200 fs pulses, with photon energies between 0.8 keV and 24 keV. It will be 10 orders of magnitude brighter than existing third generation light sources. LLNL is responsible for designing the optics and diagnostics; the brightness (corresponding to >30 J/cm^2) and pulse length offer "unique design opportunities". A description of the light source itself, some of the initial experiments, and the optical and diagnostic requirements, will be presented. This will be followed by ideas on how we might design some of the diagnostics; good ideas are needed for others.