Bonn 2010 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 87: Beschleunigerphysik X
T 87.2: Vortrag
Freitag, 19. März 2010, 14:15–14:30, HG ÜR 8
Development of a Cryogenic Permanent Magnet Undulator — •Florian Holy1,2, Raphael Weingartner1,2, Finn O'Shea3, Johannes Bahrdt4, Andreas Gaupp4, Hans-Jürgen Bäcker4, and Florian Grüner1,2 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany — 2Department für Physik, Ludwig-Maximilians-Universität, Am Coulombwall 1, 85748 Garching, Germany — 3Department of Physics, University of California, Los Angeles, CA 90095, USA — 4Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Glienicker Straße 100, 14109 Berlin, Germany
Analysis of matter on an atomic scale requires brilliant light sources with keV photon energies. Undulator-based light source facilities are invaluable tools for producing such photon beams. To improve their performance at even higher photon energies, it is essential to decrease the undulator period while still maintaining a high magnetic field strength. We present measurements of a new permanent magnet material, (NdPr)FeB, which shows significantly higher remanent magnetic fields of 1.69 T and a better coercivity of 70 kOe at cryogenic temperatures. A 20 period prototype is being constructed for use at the laser-wakefield experiment in Munich.