Würzburg 2018 – wissenschaftliches Programm

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ST: Fachverband Strahlen- und Medizinphysik

ST 2: Detector Physics

ST 2.1: Vortrag

Dienstag, 20. März 2018, 16:30–16:45, Phys-HS P

Geant4 simulation: Beam characterization by using a veto detector — •Christina Stergianou, Max Emde, Ronja Hetzel, and Achim Stahl — III. Physikalisches Institut B, RWTH Aachen University

Our working group develops a time-of-flight spectrometer to calculate the cross sections of nuclear reactions to identify the fragments that occur in ion therapy. For this purpose we measure the time of flight, the energy loss and the kinetic energy. We use a carbon beam on a plastic target. In front of the target is a movable veto detector which consists of four scintillator plates forming the sides of a square.
Therefore, this geometry allows gradual change of its diameter. At every diameter position we measure the particle ratios and calculate the differences. In this way the veto detector can be used additionally to measure the beam profile prior to the actual run. In this talk the simulation of the setup in Geant4 is presented. The results show that this detector can determine the origin of the beam centre with sufficient precision.