Mainz 2022 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 4: Radiation Generation and Applications
AKBP 4.2: Vortrag
Montag, 28. März 2022, 16:15–16:30, AKBP-H14
A novel compact x-ray source for microbeam radiation therapy — •Christoph Matejcek2,4, Johanna Winter1,2,3, Jan J. Wilkens2,3, Stefan Bartzsch1,2, and Kurt Aulenbacher4,5,6 — 1Helmholtz Zentrum München GmbH, Neuherberg — 2Technische Universität München, School of Medicine und Klinikum rechts der Isar, München — 3Technische Universität München, Physik-Department, Garching — 4Institut für Kernphysik, Johannes Gutenberg-Universität Mainz — 5elmholtz Institut Mainz — 6GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt
Microbeam radiation therapy is a new preclinical concept in radiation oncology. Due to the use of 25 to 100 um wide and a few 100 um 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 a strongly eccentric 0.05 mm x 30 mm focal spot. Transport of these high currents at low energy will be challenging concerning space charge forces. Furthermore, the realization of the focal spot, a good beam quality, and a low emittance are major topics. An additional application of the x-ray source can be phase contrast imaging. The final design of the x-ray source and the results of the electron tracking simulations will be presented.