Development of a Compton Camera for Online Range Monitoring of Laser-Accelerated Proton Beams via Prompt-Gamma Detection
1 Faculty of Physics, Ludwig-Maximilians-Universität München, Garching, Germany
2 King Saud University, Riyadh, Saudi Arabia
3 Physics Department E12, Technische Universität München, Garching, Germany
4 Delft University of Technology, The Netherlands
a e-mail: Peter.Thirolf@lmu.de
Published online: 20 March 2014
Presently large efforts are conducted in Munich towards the development of proton beams for bio-medical applications, generated via the technique of particle acceleration from high-power, short-pulse lasers. While so far mostly offline diagnostics tools are used in this context, we aim at developing a reliable and accurate online range monitoring technique, based on the position-sensitive detection of prompt γ rays emitted from nuclear reactions between the proton beam and the biological sample. For this purpose, we develop a Compton camera, designed to be able to track not only the Compton scattering of the primary photon, but also to detect the secondary Compton electron, thus reducing the Compton cone to an arc segment and by this increasing the source reconstruction efficiency. Design specifications and the status of the protype system are discussed.
© Owned by the authors, published by EDP Sciences, 2014
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