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

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

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006nimpa.568..778k&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 568, Issue 2, p. 778-783.

Physics

2

Scientific paper

Two monolithic E ΔE charged particle telescopes with ΔE layers of 11 and 20μm thick, respectively, produced with the Quasi-Selective Epitaxy method were tested at the Heavy Ion Laboratory in Warsaw. Thorium 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 20μmΔE layer). Pulses from both E and ΔE 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. The E ΔE two-dimensional scatter plots obtained after irradiation of the monolithic E ΔE telescopes by α-particles from the calibration source are presented. The energy resolution of the monolithic E ΔE telescope measured using α-particles was about 0.7 MeV for telescope with 20μm thick ΔE layer and 0.4 MeV for telescope with 11μmΔE layer. Response of the monolythic E ΔE telescopes for Po212 8.78 MeV α-particles registered at different impact positions at the telescope face was measured. Cross-talk signals in the monolithic E ΔE telescope as a function of position and the ΔE detector capacitance were simulated using the numerical solution of the telegraphic equation describing time-dependent evolution of the cross-talk potentials in the ΔE detector RC network.

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