GENERAL PHYSICS COLLOQUIUM
Title: | Ultrafast processes at high x-ray intensity |
Speaker: | Robin Santra, Centre for Free Electron Laser Science, DESY-Hamburg |
Time: | Wednesday, 23 March, 2011 at 3:15 p.m. |
Place: | Physics Auditorium, 3rd floor, Department of Physics |
Abstract
After a brief introduction to x-ray-induced processes and x-ray free-electron lasers, the principles of x-ray multiphoton ionization will be discussed. Results from some of the first experiments carried out at the world's first x-ray free-electron laser, the Linac Coherent Light Source at SLAC National Accelerator Laboratory, will be presented and compared with theory. It will be shown that the x-rays from the LCLS are so intense that (a) an atom can be completely stripped of all its electrons; (b) inner-shell ionization can be as fast as the Auger decay of an inner-shell hole, thus leading to the efficient formation of double-core-hole states; and (c) the characteristics of the Auger decay process itself can be modified.
Coffee/tea and cake will be served at 3 p.m.
David Field
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Trine Binderup
Department of Physics and Astronomy
Aarhus University
Ny Munkegade 120, building 1525
DK-8000 Aarhus C
e-mail: trinebm@phys.au.dk
Phone: +45 8942 3603
Office: 1525-324