Heidelberg 2022 – scientific programme
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T: Fachverband Teilchenphysik
T 66: Semiconductor Detectors: Radiation Hardness, new Materials and Concepts 2
T 66.6: Talk
Wednesday, March 23, 2022, 17:30–17:45, T-H25
Investigation of the Time Resolution of LGADs and 3D Sensors — •Leena Diehl, Monty King, Dennis Sperlich, Ulrich Parzefall, Marc Hauser, and Christina Schwemmbauer — Universität Freiburg
Future collider experiments as the high-luminosity LHC or the FCC will increase the demands of the detectors used for tracking. Sensors will not only face fluences of up to 1·1017 neq/cm2, but also high pile-up scenarios. Thus sensors are needed which have a high radiation tolerance, but also an excellent time resolution while still providing a good spatial resolution. Currently Low Gain Avalanche Diodes (LGADs) are the prime candidate when it comes to timing, reaching a resolution of below 30 ps. However, 3D sensors are promising candidates as well, as they have not only a good time resolution but also a superior radiation hardness. In order to investigate the time resolution of both LGADs and 3D sensors thoroughly, timing measurements were performed using either a beta-source or a laser with infrared wavelength. The timing-TCT measurements allow to measure the position-dependence of the time resolution, which is interesting especially for the 3D-sensors, where the time walk is an important component of the resolution. This talk will present some initial results of the measurements, including the calibration of the timing-TCT setup and first measurements with were 3D-sensors as well as LGADs.