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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 1: Particle Sources
AKBP 1.4: Vortrag
Montag, 16. März 2020, 15:45–16:00, MOL 213
A novel X-ray source for microbeam radiation therapy — •Christoph Matejcek2,4, Johanna Winter1,2,3, Jan Wilkens2,3, Stefan Bartzsch1,2, and Kurt Aulenbacher4,5,6 — 1Helmholtz Zentrum München GmbH, Neuherberg, Germany — 2Technische Universität München, School of Medicine und Klinikum rechts der Isar, München, Germany — 3Technische Universität München, Physik-Department, Garching, Germany — 4Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, Mainz, Germany — 5Helmholtz Institut Mainz, Mainz, Germany — 6GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
Microbeam radiation therapy is a new preclinical concept in radiation oncology. Due to the use of 25 to 100 µm wide and a few 100 µm separated planar x-ray beams, high peak dose values are crucial. Additionally low photon energy of a few 100 keV and high dose rates are demanded to suppress blurring of the dose pattern. To produce such x-rays with a preclinical prototype of a compact microbeam x-ray tube, a new electron source with a fast rotating target for x-ray production is under development. The source will deliver electrons with a kinetic energy of 300 keV and a current of 300 mA on an eccentric 0.05×20 mm2 focal spot. Transport of these high currents at relative low energy will be challenging concerning space charge forces. Furthermore the realisation of the focal spot, good beam quality, low emittance are major topics. An additional application of the source can be phase contrast imaging. The general design and recent calculations and simulations will be presented.