Events - today, tomorrow ... soon Highlights and News
tomorrow: 2015/01/27
Seminarraum 2.01, Geb. A, 11:00 h   Dr. Daniela Rupp
Institut fŘr Optik u. Atomare Physik, Technische Universitńt Berlin
Imaging of ultrafast plasma dynamics in single particles with intense XUV pulses
26th November 2014: Filming chemistry with a high speed x-ray camera
Chemistry happens all around us. A chemical reaction is a rearrangement of atoms in and between molecules, the breaking of old and the formation of new bonds. The glue that binds atoms in molecules and creates the bonds between them is made out of valence electrons. ... more.
10th November 2014: The longer the better: Optical long-wavelength pulses generate brilliant ultrashort hard x-ray flashes
Researchers from the Max-Born-Institut and the Technical University of Vienna present a novel table-top source of ultrashort hard x-ray pulses with an unprecedented photon flux. ... more.
4th September 2014: Now you see me, now you don┤t ...
New experiments in the helium atom allow to turn electron correlation on and off at will   ... more.
25th June 2014: Freedom of electrons is short-lived
Ruring the interaction of an intense extreme-ultraviolet (XUV) laser pulse with a cluster, many ions and free electrons are created, leading to the formation of a nanoscale plasma. In experiments using XUV/X-ray free electron lasers (FELs) it was previously demonstrated that only a small fraction of these electrons can leave the cluster, while the majority of the electrons remain trapped within the cluster and may therefore recombine with ions  ... more.
9th April 2014: AC/DC for terahertz waves - rectification with picosecond clock rates
Researchers at the Max-Born-Institute in Berlin, Germany discover an ultrafast rectifier for terahertz radiation. In the unit cells of a lithium niobate crystal alternating currents (AC) with a frequency 1000 times higher than that of modern computer systems are transformed into a direct current (DC), thereby generating simultaneously a series of overtones of the terahertz radiation.  ... more.
21st March 2014: Acceleration of atoms in an intense standing light wave
Laser induced strong-field phenomena in atoms and molecules on the femtosecond (fs) time scale have been almost exclusively investigated with traveling wave fields. In almost all cases, approximation of the strong electromagnetic field by an electric field purely oscillating in time suffices to describe experimental observations. In this approximation, momentum transfer from the light field to the center of mass of the atom, which results in a deflection, is not possible. Scientists at MBI have succeeded in deflecting Helium atoms in an intense standing wave of extremely short duration.  ... more.
21st February 2014: Is there any quantum mechanics in laser-induced double ionization?
The multi-electron dynamics in atoms and molecules is a great challenge in contemporary quantum physics, with implications from chemical reactions to superconductivity. A classical example, much investigated over the last two decades, has been the so-called "nonsequential" double ionization (NSDI) of atoms by an intense laser field, where "nonsequential" means that ionization does not happen one step at a time, viz. ionization of the atom later followed by ionization of the positively charged ion, but rather in one combined process. ... more.
21st February 2014: Revealing secrets of exploding clusters
The investigation of cluster explosion dynamics under intense extreme-ultraviolet (XUV) pulses has so far been limited to large scale facilities likefree-electron lasers. In a recent publication it was shown that the research on clusters is now also possible with intense XUV pulses obtained in a laboratory-scale environment with a newly developed light source that makes use of the high-order harmonic generation process. ... more.
14th February 2014: Dr. Martin Hempel receives the Adlershof Dissertation Prize 2013
On February 13, the Adlershof Dissertation Award was granted to Dr. Martin Hempel of the Max-Born-Institute (MBI). In competition with two other nominees and according to the jury's unanimous opinion, he presented best his dissertation work "Defect Mechanism in Diode Lasers at High Optical Output Power: The Catastrophic Optical Damage". ... more.


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