Pulse-shape analysis of signals from monolithic silicon – telescopes produced by the quasi-selective epitaxy

Two monolithic E – Δ E charged particle telescopes with Δ E layers of 11 and 20 μ m thick, respectively, produced with the Quasi-Selective Epitaxy method were tested at the Heavy Ion Laboratory in Warsaw. m source α -particles and 12C(14N,X) reaction products at 80 MeV beam energy were used. During on-beam tests, detectors were placed at 20 ∘ laboratory angle with respect to the beam axis. Among the reaction products, ions of Li, Be, B, C, N, O, F were identified (using the telescope with 20 μ m Δ E layer). from both E and Δ E components of the telescope were digitalized with a digital oscilloscope, sent to a PC machine and recorded. Pulse shape analysis technique was then applied to obtain the final two dimensional spectrum. – Δ E two-dimensional scatter plots obtained after irradiation of the monolithic E – Δ E telescopes by α -particles from the calibration source are presented. The energy resolution of the monolithic E – Δ E telescope measured using α -particles was about 0.7 MeV for telescope with 20 μ m thick Δ E layer and 0.4 MeV for telescope with 11 μ m Δ E layer. se of the monolythic E – Δ E telescopes for Po 212 8.78 MeV α -particles registered at different impact positions at the telescope face was measured. talk signals in the monolithic E – Δ E telescope as a function of position and the Δ E detector capacitance were simulated using the numerical solution of the telegraphic equation describing time-dependent evolution of the cross-talk potentials in the Δ E detector RC network.