Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 64: Instrumentierung

HK 64.7: Vortrag

Freitag, 21. März 2014, 15:30–15:45, HZ 9

Development of a Compton camera for online ion beam range verification via prompt γ detection * — •Saad Aldawood^1,2, Christian Lang¹, Hugh van der Kolff^1,3, Ludwig Maier⁴, Rudolf Lutter¹, Jonathan Bortfeldt¹, Katia Parodi¹, and Peter G. Thirolf¹ — ¹Ludwig-Maximilians-Universität München, Germany — ²King Saud University, Riyadh, Saudi Arabia — ³Delft University of Technology, The Netherlands — ⁴Technische Universität München, Germany

Precise and preferablly online ion beam range verification is a mandatory prerequisite to fully exploit the advantages of hadron-therapy in cancer treatment. Our aim is to develop an imaging system based on a Compton camera designed to detect prompt γ rays induced by nuclear reactions between ion beam and biological tissue. The Compton camera prototype consists of a stack of double-sided Si-strip detectors (DSSSD) acting as scatterers, while the absorber is formed by a LaBr₃ scintillator crystal read out by a position-sensitive multi-anode photomultiplier. The LaBr₃ detector was characterized with both absorptive and reflective side-face wrapping materials. Comparative studies of energy and time resolution, photopeak detection efficiency and spatial resolution will be presented together with first tests of the complete camera system.

* Supported by the DFG Cluster of Excellence MAP (Munich-Centre for Advanced Photonics).