Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 17: Anwendungen kernphysikalischer Methoden
HK 17.8: Vortrag
Dienstag, 20. März 2012, 18:30–18:45, RW 3
Seeded quantum FEL at 478 keV — •Marc Günther1, Peter Thirolf2, Thorben Seggebrock2, and Dietrich Habs1,2 — 1Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany — 2Ludwig-Maximilians-Universität München, D-85748 Garching, Germany
We present for the first time a concept for a seeded γ quantum Free Electron Laser (QFEL) at 478 keV (transition in 7Li). To produce a highly intense and coherent γ beam, we intend to use a seeded FEL scheme. Important for the production of a highly brilliant and coherent γ beam are novel refractive γ lenses for focusing and an efficient monochromator, allowing to generate a very intense and coherent seed beam. To realize such a coherent γ beam at 478 keV (1/38 Å), it is suitable to use a quantum FEL design based on a new ''asymmetric'' laser-electron Compton back scattering scheme as pursued for the MeGaRay and ELI-NP facilities [1]. Here the pulse length of the laser is much longer than the electron bunch length, equivalent to a γ-FEL with laser wiggler. The coherence of a seeded QFEL can open up totally new areas of fundamental physics and applications. Especially, 478 keV can be attractive for ''green energy'' and life-science research, such as the detection of Li deposition in the brain for manic-depressive psychosis treatment with high spatial resolution or isotope-specific nuclear waste management and treatment.
[1] http://www.eli-np.ro/gamma-beam-meeting-august-presentation.php