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Your search keyword '"Hahn, U."' showing total 2 results
Start Over Author "Hahn, U." Region hamburg (germany)
2 results on '"Hahn, U."'

1. PETRA III: A New High Brilliance Synchrotron Radiation Source at DESY.

Author

Weckert, E., Balewski, K., Brefeld, W., Decking, W., Drube, W., Franz, H., Gürtler, P., Hahn, U., Pflüger, J., Schulte-Schrepping, H., Tischer, M., Schneider, J., and Warwick, T.

Subjects
STORAGE rings, PARTICLE accelerators, SYNCHROTRON radiation sources, ELECTRON beams, BEAM optics
Abstract

DESY in Hamburg, Germany, has decided to reconstruct its 2.304 km long storage ring PETRA II into a third generation synchrotron radiation source starting 2007. The synchrotron source will operate at 6 GeV particle energy, 100 mA current and an emittance of 1 nmrad. In the first phase thirteen independent undulator beamlines will be available for user experiments. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2004
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2. A fast switching mirror unit at FLASH

Author

Sternberger, R., Sachwitz, M., Donat, A., Gensch, U., Heller, R., Vu, L.V., Hahn, U., Schulte-Schrepping, H., and Tiedtke, K.

Subjects
*NUCLEAR facilities, *FREE electron lasers, *LINEAR accelerators, *LASER beams
Abstract

Abstract: The Free Electron Laser at Hamburg (FLASH) facility at the Deutsches Elektronen-Synchrotron (DESY) is a linear accelerator that is operated in superconducting technology and produces soft X-ray laser light from 4.5 to 47nm. Several switching mirrors, located in the experimental hall, provide different beam lines with laser light, where the switching procedure lasts up to 1h and is performed at intervals of days or sometimes weeks. Since the experiments would be sufficient even with a lower repetition rate of the beam, a new kind of switching mirror has been invented. In this paper, the design and implementation of a fast switching mirror at FLASH are presented where focussed and unfocussed beam trains can be distributed between two beam lines with a frequency of up to 2.5Hz. The challenge lies in the precise repetition accuracy of position (few μm) and angle (about 1arcsec) of the mirror. In addition, first measurements taken at FLASH are analyzed and they show only little influence of the developed switching mirror on the beam position. [Copyright &y& Elsevier]

Published
2011
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