PSD13: The 13th International Conference on Position Sensitive Detectors

3D single pixel time resolution and uniformity after proton and neutron irradiation of up to 1e17 neq/cm2 at 120 GeV SPS beams

6 Sept 2023, 11:40

20m

St Catherine's Bernard Sunley Building (Oxford)

Talk Detectors for High Radiation & Extreme Environments Detectors for High radiation and extreme environment

Speaker

Dr Vagelis Gkougkousis (CERN)

Description

The proven radiation hardness of silicon 3D devices up to fluences of $1\times {10}^{17}{n}_{eq}/c{m}^2$ makes them an excellent choice for next generation trackers, providing $<10\mu m$ position resolution at a high multiplicity environment. The anticipated pile-up increase at HL-LHC conditions and beyond, requires the addition of < 50 ps per hit timing information to successfully resolve displaced and primary vertices. In this study, the timing performance, uniformity, and efficiency of neutron and proton irradiated single pixel 3D devices is discussed. Fluences up to $1\times {10}^{17}{n}_{eq}/c{m}^2$ in three different geometrical implementations are evaluated using 120 GeV SPS pion beams. A MIMOSA26 type telescope is used to provide detailed tracking information with a ~$5\mu m$ position resolution. Productions with single- and double-sided processes, yielding active thickness of 130 and 230 $\mu m$ respectively, are examined with varied pixel sizes from $55\times 55\mu m^2$ to $25\times 100\mu m^2$ and a comparative study of field uniformity is presented with respect to electrode geometry. The question of electronics bandwidth is extensively addressed with respect to achievable time resolution, efficiency and collected charge, forming a tri-dimensional phase space to which an appropriate operating point can be selected depending on the application requirements.

Presentation materials

PSD13_Gkougkousis.pdf