FLASH News Archive 2007

05 December 2007

FLASH: Photoelectric Effect at Ultrahigh Intensities (November 2007)

Scientists from the Physikalisch-Technische Bundesanstalt (PTB Berlin), Ioffe Physico-Technical Institute (St. Petersburg, Russia), Fraunhofer Inst. f. Ang. Optik u. Feinm. (Jena), and DESY contributed to the study of the photoelectric effect at ultrahigh intensities. The results were recently obtained at FLASH when XUV pulses of 10 fs duration were tightly focused on free Xenon atoms.

How many ...

23 October 2007

Submissions to the 2007 HASYLAB Annual Report

Submissions of scientific activity reports and lists of publications to the HASYLAB Annual Report 2007 will be received until December 3, 2007.
Please note that all submissions for the EMBL and MPG volume are collected separately via the EMBL/MPG web pages.

14 October 2007

Wavelength World Record at FLASH: 6.5 Nanometers! (Oct. 14, 2007)

After a successful upgrade, the FLASH facility at DESY achieved a world premiere by generating flashes of laser light at the minuscule wavelength of 6.5 nanometres (nm), thereby breaking the world record of 13.5 nm it established one year ago. The facility now provides even better research opportunities for the second measuring period, which will begin in mid November.

In a maintenance shutdown that ...

09 August 2007

Femtosecond time-delay X-ray holography at FLASH (August 2007)

Scientists from the Lawrence Livermore National Laboratory (LLNL), Center for Biophotonics Science and Technology at UC Davis, Stanford Linear Accelerator Center, Uppsala University in Swedan, TU Berlin, and DESY contributed to the study of femtosecond time-delay X-ray holography at FLASH. They used a simple holographic measurement scheme, inspired by Newton's 'dusty mirror' experiment, to monitor the X-ray-induced ...

03 July 2007

Crossed Beam Photodissociation Imaging of HeH+ with FLASH pulses (July 2007)

Scientists from the Max Planck Institute for Nuclear Physics in Heidelberg, their collaborators from DESY, from the Weizmann Institute of Science (Israel), and the University of Hamburg reported on results from a first path-finding crossed beams imaging experiment at FLASH on the photodissociation of HeH+ at 32 nm, detecting events leading to neutral He fragments and analyzing the kinetic energy release and the ...

28 June 2007

Entering the water window - FLASH article in nature photonics (June 2007)

Scientists from DESY and their collaborators from 26 universities or institutes reported on the performance of the free-electron laser FLASH at DESY. The laser was operated at a wavelength of 13.7 nm where unprecedented peak and average powers for a coherent extreme-ultraviolet radiation source have been measured.

In the saturation regime, the peak energy approached 170 microJ for ...

01 June 2007

New FLASH Brochure online available at DESY

In the new FLASH brochure (52 pages/plus further information on CD-ROM), the novel technologies and the free-electron laser principle are explained on a level which should be useful to graduate students, but also to scientists who may become interested in using this new tool for their own research.

The brochure therefore describes the properties of the radiation, the diagnostic tools and the layout of ...

06 May 2007

Soft X-ray laser spectroscopy on trapped highly charged ions at FLASH

Scientists from the Max Planck Institute for Nuclear Physics in Heidelberg, their collaborators from DESY and from University of Hamburg reported on the first demonstration of resonance fluorescence laser spectroscopy by matching soft X-rays from the free electron laser FLASH at DESY together with highly charged ions (HCI) provided in an electron beam ion trap (EBIT).

They investigated the transition ...

29 May 2007

Few-photon multiple ionization of Ne and Ar by strong FLASH pulses

Scientists from the Max Planck Institute for Nuclear Physics in Heidelberg, their collaborators from DESY, from the University of Frankfurt and other institutes reported on non-sequential few-photon multiple ionization of Ne and Ar Atoms by intense FLASH radiation. Few-photon multiple ionization, i.e. the interaction of two or three photons with two or three electrons bridges the gap between the single and ...

02 February 2007

HASYLAB Users Meeting 2007

The annual HASYLAB Users’ Meeting, followed by a poster session (and vendor exhibition) has become an institution.

On Jan. 26, 2007 about 340 scientists got information on the status of the running photon sources (FLASH, DORIS III) and current projects (PETRA III, XFEL). The six satellite meetings dealing with specific topics that had started a day earlier were well attended. The users’ meeting ...