Figure 1
From: A high sensitivity Cherenkov detector for prompt gamma timing and time imaging
Set-up of the experiment carried out at the MEDICYC facility with 63 MeV protons. A first version of the TIARA module, composed of a 1 cm\(^3\) PbF\(_2\) crystal coupled to a 3\(\times\)3 mm\(^2\) SiPM and facing the Bragg peak region at 90\(^{\circ }\), was tested in time coincidence with a sc diamond detector of \(4.5\times 4.5\times 0.55\) mm\(^3\) volume. For the time and energy response characterisation, only PG signals from the thin PMMA target (cylinder of 10 cm radius) were considered: repeated measurement were carried out with either a 5 mm or a 1 cm thick target and the results were then averaged. The second target (cylinder of 10 cm radius and 23 cm thickness) was employed in the measurement of the proton range sensitivity; initially placed at 3 cm distance from the thin target, it was progressively moved by 2, 4, 6 and 10 mm in order to induce an artificial shift in the proton range. All the targets have a density of 1.19 g/cm\(^3\).
