Bonn 2020 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 63: Combined Instrumentation Session: Semiconductor Detectors (joint session HK/T)

HK 63.6: Talk

Friday, April 3, 2020, 12:15–12:30, H-HS XV

Ultra Fast Silicon Detectors for timing applications in HADES — •Wilhelm Krueger¹, Nicolo Cartiglia², Marco Ferrero^2,3, Tetyana Galatyuk^1,4, Mladen Kis⁴, Wolfgang Koenig⁴, Michal Koziel⁵, Sergey Linev⁴, Jan Michel⁵, Stefano Moneta⁶, Jerzy Pietraszko⁴, Adrian Rost¹, Arnaud Schemm⁷, Valentina Sola², Konrad Sumara⁸, Michael Traeger⁴, Michael Traxler⁴, and Christian Wendisch⁴ — ¹TU Darmstadt, Germany — ²INFN, Sezione di Torino, Italy — ³Università del Piemonte Orientale, Novara, Italy — ⁴GSI, Darmstadt, Germany — ⁵Goethe-Universität Frankfurt, Germany — ⁶Universita di Pisa, Italy — ⁷IMT Atlantique, Campus de Nantes, France — ⁸Jagiellonian University in Kraków, Poland

In order to measure a precise time zero (T0) for particle identification produced in nucleon-nucleon or nucleus-nucleus collisions a time precision of 50 ps or better is required. Ultra fast silicon detectors (UFSD) enable such precision. In addition the combination of high spatial resolution, high time precision and high radiation hardness makes them an excellent alternative to the scCVD diamond detectors used so far by HADES for T0 measurements and for beam monitoring.

In this contribution we present the results of test measurements conducted at COSY in Juelich. Particular emphasis is put on achieving the desired precision for MIPs and on comparison of two different discriminator boards, one based on the NINO chip and the other, called PaDiWa, which is based on discrete components. This work has been supported by BMBF under ErUM -FSP C.B.M. and GSI.