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Dive into the research topics where Stefan Borneis is active.

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Featured researches published by Stefan Borneis.


26th European Conference on Laser Interaction with Matter (ECLIM 2000) | 2001

PHELIX: a petawatt high-energy laser for heavy ion experiments

Markus Roth; Bruno Becker-de Mos; R. Bock; Stefan Borneis; Herbert Brandt; C. Bruske; John A. Caird; E. L. Dewald; C. Haefner; D. H. H. Hoffmann; M.P. Kalachnikov; H.-J. Kluge; Ferenc Krausz; Thomas Kuehl; Grant Logan; D. Marx; Paul Neumayer; P. V. Nickles; M. P. Perry; K. Poppensieker; Irene Reinhard; W. Sandner; Roland A. Sauerbrey; A. Tauschwitz; I. Will

The unique combination of an intense heavy ion beam accelerator and a high energy laser opens the possibility of exploring new physics taking advantage of the synergy of both facilities. A variety of new fields can be addressed with this combination in plasma physics, atomic physics, nuclear- and astro-physics as well as material research. In addition, using CPA-technology, laser pulses with a pulse power of up to a petawatt opens the door to explore the regime of fully relativistic plasmas. Therefore the Gesellschaft fuer Schwerionenforschung is augmenting the current high intensity upgrade of the heavy ion accelerator facility with the construction of PHELIX. Designed with two pulse-generating front ends and send to multiple experimental areas PHELIX will serve as a highly versatile laser system for various applications. In this report, we present the design of the laser system and some key experiments that can be performed with this combination for the first time.


International Symposium on Optical Science and Technology | 2001

X-ray laser spectroscopy on lithium-like ions

Paul Neumayer; J. Alvarez; Bruno Becker-de Mos; Stefan Borneis; K. Brueck; E. Gaul; C. Haefner; K. A. Janulewicz; Thomas Kuehl; D. Marx; Irene Reinhard; Marco Tomaselli; P. V. Nickles; W. Sandner; W. Seelig

The Gesellschaft fuer Schwerionenforschung (GSI, Society for Heavy Ion Research) is currently the leading facility in the production of radioactive isotopes. Nuclear properties like charge radii, spin, and magnetic moments of exotic nuclei provide important data for testing of nuclear models. These properties are usually accessed by laser spectroscopy, which requires photon energies of around 100 eV in the case of lithium-like ions. We propose to use a transient gain X-ray laser (XRL) at the experimental storage ring (ESR) to perform this kind of spectroscopy. In this article we describe the planned experiments and give an overview of the current construction at GSI.


Optical Science and Technology, SPIE's 48th Annual Meeting | 2003

Near-field imaging of Ni-like silver transient collisional x-ray laser

O. Guilbaud; Matthew Edwards; A. Klisnick; David Ros; G. Jamelot; Denis Joyeux; D. Phalippou; Huajing Tang; Paul Neumayer; D. Ursescu; G.J. Tallents; Thomas Kuehl; K. Cassou; Kamal Bouhouch; Masataka Kado; Masaharu Nishikino; Kota Sukegawa; Maki Kishimoto; Masahiko Ishino; K. Nagashima; H. Daido; W. Seelig; Stefan Borneis; E. Gaul; W. Geithner; C. Hafner; Piotr P. Wiewior

We review our recent progress in the development of transient x-ray lasers and of their application to plasma diagnostic. The first observation of C-ray laser emission at the new PHELIX-GSI facility is reported. This TCE X-ray laser will be a promising tool for heavy-ion spectroscopy. We then present the main results obtained at the LULU-CPA facility with a compact high-resolution X-UV imaging device. This device was used to investigate the spatial source structure of the Ni-like silver transient X-ray laser under different pumping conditions. The key-role of the width of the background laser pulse on the shape of the emitting aperture is demonstrated. Finally the imaging device was used as an interference microscope for interferometry probing of a laser-produced plasma. We describe this experiment performed at APRC-JAERI.


Proceedings of SPIE, the International Society for Optical Engineering | 1998

Optimization of high-power excimer laser for TFT annealing

Heinrich Endert; Bruno Becker-de Mos; Uwe Stamm; Stefan Borneis; Frank Voss; Dirk Basting

The flat panel display market is presently experiencing an annual growth rate of over 20%, and shows no signs of slowing down. Polycrystalline-silicon (poly-Si) thin film transistor (TFT) devices offer both improved quality and decreased cost over amorphous silicon displays, and will undoubtedly capture an ever increasing share of this market. However, producing poly-Si TFTs in high volume has presented a number of practical challenges. One of these challenges is transforming an amorphous silicon layer into poly-Si. For several years, researchers have investigated using excimer lasers for this purpose. In excimer laser annealing, a high-power excimer laser beam is scanned across the surface of a substrate coated with amorphous silicon. The intense UV light causes the silicon to melt, leading to subsequent recrystallization in polycrystalline form. This process is very non-linear, and places tight tolerances on laser beam parameters such as energy stability and beam uniformity. Furthermore, for this technique to be successfully integrated into a high volume production line, the laser must exhibit extremely high reliability, minimum downtime and low cost of ownership. In the past few years, excimer laser manufacturers have made significant technical improvements, leading to products that can successfully meet the rigorous demands of industrial TFT production. As a result, major display manufacturers in Japan, Korea and Europe have now adopted this technology for mass production.


Physical Review Letters | 1994

Precision laser spectroscopy of the ground state hyperfine splitting of hydrogenlike ^209 Bi^82+

Ingo Klaft; Stefan Borneis; Thomas Engel; Burkhard Fricke; Ralf Grieser; G. Huber; T. Kuhl; D. Marx; Reinhard Neumann; Sönke Schröder; Peter Seelig; Lothar Völker


Archive | 1996

Tunable narrowband source of a coherent radiation

Uwe Stamm; Ingo Klaft; Vadim Berger; Stefan Borneis; Peter Lokai


Archive | 2000

Very stable excimer or molecular fluorine laser

Stefan Borneis; Klaus Brunwinkel; Uwe Stamm; Frank Voss


Physical Review Letters | 1994

Laser-stimulated two-step recombination of highly charged ions and electrons in a storage ring

Stefan Borneis; F. Bosch; T. Engel; M. Jung; Ingo Klaft; O. Klepper; T. Kuhl; D. Marx; R. Moshammer; R. Neumann; S. Schröder; P. Seelig; L. Völker


Archive | 1997

Production of narrow-band coherent radiation by using at least one optical parametric oscillator

Uwe Stamm; Ingo Klaft; Stefan Borneis; Vadim Berger; Peter Lokai


Archive | 2006

Method of Increasing the Laser Damage Threshold of Diffraction Gratings

Stefan Borneis; Eckenhard Onkels; Dasa Javorkova; Paul Neumayer

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D. Marx

Technische Hochschule

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Paul Neumayer

GSI Helmholtz Centre for Heavy Ion Research

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W. Seelig

Technische Universität Darmstadt

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A. Tauschwitz

Goethe University Frankfurt

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Markus Roth

Technische Universität Darmstadt

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R. Bock

GSI Helmholtz Centre for Heavy Ion Research

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