Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 94: Detektorsysteme VII

T 94.8: Talk

Thursday, March 28, 2019, 17:45–18:00, H10

Analysis of test beam measurements for the ATLAS High Granularity Timing Detector — •Jens Soengen, Lucia Masetti, and Marisol Robles — Johannes Gutenberg-Universitaet

The high-luminosity upgrade to the LHC(HL-LHC) is foreseen to start operating in 2026 and will boost the potential of discovering new particles substantially. However, the increased instantaneous luminosity of up to 7.5·10³⁴ cm⁻²s⁻¹ also implies rising requirements to the ATLAS detector. In order to guarantee the correct assignment of particles from hard-scattering events, a High-Granularity Timing Detector(HGTD) is planned to mitigate the effect of pile-up. The most appropriate candidate is a silicon-based avalanche detector with low-gain(LGAD) and reduced thickness in the magnitude of 50 µm, promising an excellent time resolution below 30 ps. Its capabilities are examined under testbeam conditions with a 120 GeV pion beam at the CERN SPS. This talk will outline the central work steps of the analysis process as well its current status. Finally the crucial qualities, such as timing-performance and efficiency are presented for the latest testbeam campaigns in 2018.