Düsseldorf 2007 – scientific programme
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P: Fachverband Plasmaphysik
P 22: Poster
P 22.3: Poster
Thursday, March 22, 2007, 16:30–18:30, Poster A
UV Excimer Laser Pumped with Heavy Ion Beam — •Aleks Adonin1, Vladimir Turtikov1,2, Alexander Golubev2, Dieter H. H. Hoffmann3,5, Joachim Jacoby1, Alexander Hug5, Jurij Menzel5, Serban Udrea5, Andreas Ulrich4, Dmitry Varentsov5, and Jochen Wieser6 — 1Johann Wolfgang Goethe-Universität, Frankfurt am Main, Germany — 2Institute for Theoretical and Experimental Physics (ITEP), Moscow, Russia — 3Gesellschaft für Schwerionenforschung (GSI), Darmstadt, Germany — 4Technische Universität München (TUM), Garching, Germany — 5Technische Universität Darmstadt (TUD), Germany — 6Coherent GmbH, München, Germany
In December 2005 the first successful operation of an UV excimer laser pumped with heavy ion beam was demonstrated at GSI, Darmstadt. The well known KrF* excimer laser line at λ = 248 nm has been chosen for the first experiment, because the wavelength is rather short, but it is still in the range of usual optical diagnostic tools and the emitted light can propagate in air without strong attenuation. Pulses of cooled, bunch compressed (110 ns FWHM) U+73 beam with a particle energy of 250 MeV/u and with intensity up to 2,5x10+9 particles were focused into 1,3 m long laser cell along the cavity. Excimer mixture of Ar-Kr-F2 has been used as a laser gas at pressures 1,2 - 2 bar. As a main result of the experiment the laser effect of the 248 nm KrF* excimer emission has been obtained and proved. In summary we have demonstrated that the pumping power of the heavy ion beams at GSI is now good enough to pump short wavelength lasers. Further experiments are scheduled to extend the laser wavelength into the VUV range at λ less than 200nm.