Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Smaller, cheaper and better:A new design for compact free-electron lasers leads the way towards exploiting extremely short wavelengths

Figure 1: A view at the beam hall of the FEL test facility. The electron gun is contained in the grey box on the left.
Figure 1: A view at the beam hall of the FEL test facility. The electron gun is contained in the grey box on the left.

Abstract:
Physicists are greatly interested in free-electron lasers (FEL) because they are capable of generating high-intensity laser radiation across a very broad wavelength spectrum, even down to the extreme ultraviolet rays and x-rays. Worldwide, several multi-billion-dollar efforts are underway to build next-generation free-electron lasers at x-ray wavelengths. As part of these efforts, a compact and efficient design has been realized by researchers from the RIKEN XFEL Project Head Office, collaborating with the Japan Synchrotron Radiation Research Institute (JASRI). They report on the superior properties of extreme ultraviolet FEL laser radiation from a first-test system in Nature Photonics1.

Smaller, cheaper and better:A new design for compact free-electron lasers leads the way towards exploiting extremely short wavelengths

Japan | Posted on October 31st, 2008

Free-electron lasers consist of two fundamental components: an accelerator that produces high-energy electrons, and so-called ‘undulators' that send these electrons on a periodically curved path. The wiggling of the electrons along the path causes the emission of high-energy laser radiation through electro-magnetic interaction between the electrons and the radiation field.

Currently, x-ray FELs require large-scale electron accelerators of a few kilometers in length. It is important to reduce this length to enable the fabrication of cheaper FEL systems. The project team's compact FEL design of 55 m has produced a high-quality laser beam at the RIKEN Harima Institute.

To achieve this significant reduction in accelerator length, the team used special undulators with a shorter electron oscillation period, which allows the generation of x-rays with lower energy electrons. However, for this novel scheme to work effectively, "a stable and high-quality electron beam is needed, where all electrons propagate nearly parallel and with high density," comments Hitoshi Tanaka from the team. To attain such good beam properties, the team used an ‘electron gun' (Fig. 1), technically known as a thermionic gun, which has a CeB6 single crystal cathode and is reminiscent of the electron emitters used in electron microscopes.

The full system presently being constructed next to the SPring-8 storage ring will reach a total length of about 700 m, which is less than a third of the length of competing designs. This shorter length reduces the construction cost, which is estimated at 370 billion yen, compared to 750 and 1,500 billion yen, respectively, for international competitors.

A future aim of the researchers is to also realize FELs at much shorter wavelengths, down to the x-ray region at around 0.1 nm, which will enable new research applications. Indeed, Makina Yabashi from the research team is convinced that this can be achieved and that "the compactness of our design will considerably expand the opportunities for engineering and medical research."
Reference

1. Shintake, T., Tanaka, H., Hara, T., Tanaka, T., Togawa, K., Yabashi, M., Otake, Y., Asano, Y., Bizen, T., Fukui, T. et al. A compact free-electron laser for generating coherent radiation in the extreme ultraviolet region. Nature Photonics 2, 555-559 (2008).

The corresponding authors for this highlight are based at the RIKEN XFEL Project Head Office

####

For more information, please click here

Copyright © Riken

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

article

Related News Press

News and information

Arrowhead Pharmaceuticals to Host R&D Day on Emerging Pipeline of RNAi Therapeutics September 25th, 2018

Arrowhead Pharmaceuticals to Host R&D Day on Emerging Pipeline of RNAi Therapeutics September 25th, 2018

Arrowhead Pharmaceuticals Reports Inducement Grants under NASDAQ Marketplace Rule 5635(c)(4) September 25th, 2018

Viral RNA sensing: Optical detection of picomolar concentrations of RNA using switches in plasmonic chirality September 21st, 2018

Discoveries

Searching for errors in the quantum world September 21st, 2018

Viral RNA sensing: Optical detection of picomolar concentrations of RNA using switches in plasmonic chirality September 21st, 2018

UT engineers develop first method for controlling nanomotors: Breakthrough for nanotechnology as UT engineers develop first method for switching the mechanical motion of nanomotors September 21st, 2018

Silver nanoparticles are toxic for aquatic organisms: A research team at the UPV/EHU-University of the Basque Country has analysed how zebrafish are affected in the long term by exposure to silver particles September 19th, 2018

Announcements

Arrowhead Pharmaceuticals to Host R&D Day on Emerging Pipeline of RNAi Therapeutics September 25th, 2018

Arrowhead Pharmaceuticals to Host R&D Day on Emerging Pipeline of RNAi Therapeutics September 25th, 2018

Arrowhead Pharmaceuticals Reports Inducement Grants under NASDAQ Marketplace Rule 5635(c)(4) September 25th, 2018

Viral RNA sensing: Optical detection of picomolar concentrations of RNA using switches in plasmonic chirality September 21st, 2018

Photonics/Optics/Lasers

Halas wins American Chemical Society Award in Colloid Chemistry: Rice University nanophotonics pioneer honored for colloid research September 18th, 2018

Tiny camera lens may help link quantum computers to network September 14th, 2018

New photonic chip promises more robust quantum computers September 14th, 2018

Laser sintering optimized for printed electronics: New study sheds (laser) light on the best means of laying down thin-film circuitry September 13th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project