Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Intense 2-color double X-ray laser pulses: a powerful tool to study ultrafast processes

04.12.2013
A team working at the SACLA X-ray Free-Electron Laser (XFEL) in Japan has succeeded in generating ultra-bright, two-color X-ray laser pulses, for the first time in the hard X-ray region.

These light pulses with different wavelengths, whose time separation can be adjusted with attosecond accuracy, are very powerful tools to investigate the structure of matter and the dynamics of ultrafast physical processes and chemical reactions.


A team working at the SACLA X-ray Free-Electron Laser in Japan has succeeded in generating ultra-bright, two-color X-ray laser pulses, for the first time in the hard X-ray region. These light pulses with different wavelengths, whose time separation can be adjusted with attosecond accuracy, are very powerful tools to investigate the structure of matter and the dynamics of ultrafast physical processes and chemical reactions.

Credit: RIKEN

SACLA is one of only two facilities in the world to offer XFEL as light source to investigate matter, with various applications in biology, chemistry, physics and materials science. XFELs have the capacity to deliver radiation ten billion times brighter and with pulses one thousand times shorter than existing synchrotron X-ray radiation sources. Until now, XFELs have normally emitted one radiation pulse at a single wavelength like conventional visible lasers.

The Japanese team led by Toru Hara of the RIKEN SPring-8 Center, reports today in the journal Nature Communications that they have succeeded in creating double X-ray pulses with tunable wavelengths that can be relatively separated by more than 30%. This was achieved using variable-gap undulators, that act as a radiator and whose resonant wavelength can be largely varied by changing the magnetic field strength.

"The relative separation we have achieved is ten times bigger than what had been achieved in the past, and will make two-color lasers much easier to use as a light source. In addition, the two-color pulses can be emitted on different axes to spatially separate them. Our achievement significantly ameliorates the usability of XFEL," explains Dr Hara.

The laser pulses, that last for less than 10 femtoseconds (10−15 s) and have peak powers of a few giga-watts, can be generated with time intervals adjusted with attosecond (10-16 s) precision.

"This will enable us to elucidate X-ray-induced ultrafast transitions of electronic states and structures, which will significantly contribute to the advancement of ultrafast chemistry, plasma physics and astrophysics, and X-ray quantum optics," conclude the authors.

For more information please contact:

Juliette Savin
Global Relations Office
RIKEN
Tel: +81-(0)48-462-1225
email: pr@riken.jp
Reference:
Hara et al. "Two-colour hard X-ray free-electron laser with wide tunability"
Nature Communications, 2013
About RIKEN
RIKEN is Japan's largest research institute for basic and applied research. Over 2500 papers by RIKEN researchers are published every year in leading scientific and technology journals covering a broad spectrum of disciplines including physics, chemistry, biology, engineering, and medical science. RIKEN's research environment and strong emphasis on interdisciplinary collaboration and globalization has earned a worldwide reputation for scientific excellence.

About the SPring-8 Center

The RIKEN SPring-8 Center (RSC) was established in 2005 as a photon science research complex to enhance the distinctive capabilities of X-ray science. RSC is now the only research entity in the world offering both an X-ray free electron laser (SACLA) and a Synchrotron Radiation facility (SPring-8), at the same location.

About SACLA

In 2012, with the opening of SACLA, RIKEN became the second institution in the world to offer X-ray Free Electron Laser (XFEL) for research. The facility boasts the shortest wavelength in the world (0.6 nm), an extremely broad wavelength range and a very high peak output of 100 GW. This unique X-ray laser enables researchers to peer deeper inside matter and investigate unexplored areas of research.

Juliette Savin | EurekAlert!
Further information:
http://www.riken.jp

More articles from Process Engineering:

nachricht Quick, Precise, but not Cold
17.05.2017 | Fraunhofer-Institut für Lasertechnik ILT

nachricht A laser for divers
03.05.2017 | Laser Zentrum Hannover e.V.

All articles from Process Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>