Laserfest
Dear friends,
We are proud to present our next speaker in the Kista Science Seminar series:
Prof. Ingolf Lindau
(Lund University and Stanford University)
The X-ray Free Electron Laser - A New and Emerging Research Tool
Abstract
The laser was invented 50 years ago. About ten years later John Madey of Stanford
University published a seminal paper entitled ”Stimulated Emission of Bremsstrahlung
in a Periodic Magnetic Field” describing the induced coherent radiation from the
motion of a relativistic electron through a periodic magnetic field. This was the birth
of the free electron laser, FEL. In this talk I will describe the recent developments that
culminated with the successful first lasing in the spectral region 0.15-1.5 nm at the
Linac Coherent Light Source (LCLS) at Stanford in April 2009. The first hard x-ray FEL
became a reality. LCLS is based on the last 1000 m of the 3 km long linear accelerator
(with electron beam nergies 4-15 GeV), a 130 meter long undulator to produce the
coherent x-rays, and two experimental halls separated by 200 m.
The FEL radiation has unprecedented properties in terms of brilliance with
femtosecond pulse widths, 2-3 mJ pulse energies (10^12 photons per pulse), and
tunability. LCLS will open up novel research opportunities in a number of fields: highfield
and femtosecond physics of atoms and molecules, imaging of nanoparticles and
biomolecules (non-periodic structures), diffraction studies of stimulated dynamics
(e.g. phase transitions, charge transfer reactions), coherent- scattering studies of
nanoscale fluctuations, and high- energy density science (warm dense matter and
plasma physics). In the talk I will discuss the revolutionary science and show a few
results that have been obtained since LCLS started operation for users in October
2009. The experimental program is still in its infancy but major efforts are underway
for developments of advanced instrumentation. Finally I will outline the planned
upgrades of LCLS during the next five years to further its experimental capabilities for
a broad user community.
Time and location:
Friday March 26 at 14:30
Auditorium C1, Electrum, Kista
Coffee and tea with cake will be served in the ground floor
open area starting at 14:00
Öppna inbjudan
You are all most velcome!
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