A new analysis technique for the design and optimization of beam optics has successfully been used to model the group behavior of electron beams over a linear accelerator, paving the way for its use at linear accelerator based light source facilities around the world.
The technique contributes to improved operation of the X-ray Free-Electron Laser (XFEL) under construction at the RIKEN SPring-8 synchrotron radiation facility (Fig. 1), whose intense beams will open a unique window onto the minuscule structure of molecules and the rapid reaction of chemical species.
Despite its key importance to all fields of science, the world of atoms and molecules exists beyond the reach of traditional observation techniques, holding back progress in research on everything from molecular biology to nanotechnology.
The new XFEL at RIKEN, Japan’s flagship research institute, will shed first-ever light on this hidden world, delivering radiation one billion times brighter and with pulses one thousand times shorter than existing X-ray sources such as SPring-8. The XFEL facility will be only the second laser of its kind in the world when it opens in 2011.
Obtaining a stable XFEL beam, however, is not an easy task. To do so, the transverse distribution of electrons ejected from the XFEL’s linear accelerator must be carefully calibrated each time conditions change to match the configuration of magnets (undulators) where X-ray laser radiation is emitted (Fig. 2). In experiments with a small test accelerator, researchers performed this calibration by directly measuring the laser intensity, but the full-sized XFEL is too complicated for this approach to work.
The new technique, developed at RIKEN and the Japan Synchrotron Radiation Research Institute (JASRI), solves this problem by rapidly and precisely computing the effect of changes in optics using information on electron beam distributions after full bunch compression (Fig. 3). By doing so, the technique plays a key role in ensuring the successful operation of the XFEL, whose intense beams promise to herald a new era of scientific exploration and discovery.
For more information, please contact:Dr. Hitoshi Tanaka
Astronomers find unexpected, dust-obscured star formation in distant galaxy
24.03.2017 | University of Massachusetts at Amherst
Gravitational wave kicks monster black hole out of galactic core
24.03.2017 | NASA/Goddard Space Flight Center
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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