Hamburg 2016 – wissenschaftliches Programm

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ST: Fachverband Strahlen- und Medizinphysik

ST 3: Radiation Monitoring and Dosimetry

ST 3.3: Vortrag

Dienstag, 1. März 2016, 17:15–17:30, VMP6 HS C

A Multi-Purpose Active-Target Particle Telescope for Radiation Monitoring — •Thomas Pöschl, Martin Losekamm, Michael Milde, Daniel Greenwald, and Stephan Paul — Technische Universität München, 85748 Garching, Deutschland

Continuous monitoring of the radiation background is a key requirement in many applications. Traditional detectors can either measure the total radiation dose omnidirectionally (dosimeters), or determine the incoming particles' characteristics within a narrow field of view (spectrometers). Instantaneous measurements of anisotropic fluxes thus require several detectors, resulting in bulky setups. The compact Multi-purpose Active-target Particle Telescope (MAPT), based on a novel detection principle, can measure particle fluxes omnidirectionally. It consists of an active core of scintillating fibers whose light output is measured by silicon photomultipliers. It identifies particles using extended Bragg curve spectroscopy, with an overall sensitivity range of 25 to about 1000 MeV per nucleon. During first beam tests of a simplified prototype, the energy resolution was measured to be less than 1 MeV for protons with energies between 30 and 70 MeV. Possible applications of MAPT include the monitoring of radiation environments in spacecraft and ground-based installations. Other use cases are the measurement of energy straggling in medical radiation therapy applications and the monitoring of beam profiles at accelerator facilities. This research was supported by the DFG Cluster of excellence "Origin and Structure of the Universe".