Speaker
Description
Timing measurements are critical for the detectors at the future HL-LHC, to resolve reconstruction ambiguity when the number of simultaneous interactions reaches up to 200 per bunch crossing. The ATLAS collaboration therefore builds a new High Granularity Timing detector (HGTD) for the forward region. A customized ASIC - ALTIROC - has been developed, to read out fast signals from low gain avalanche detectors (LGAD), which has 50 ps time resolution for signals from minimum ionising particles. To meet these requirements, a custom-designed pre-amplifier, discriminator, and TDC circuits with minimal jitter have been implemented in a series of prototype ASICs. The latest version, ALTIROC3, is designed to contain full functionality. Hybrid assemblies with ALTIROC3 ASICs and LGAD sensors have been characterized with charged-particle beams at DESY and CERN-SPS and with laser-light injection. The time-jitter contributions of the sensor, pre-amplifier, discriminator, TDC and digital readout are evaluated. The poster will introduce the HGTD project and present preliminary results from laboratory and test-beam measurements.
Details
Salah El Dine Hammoud - IJCLab Saclay - France
| Internet talk | No |
|---|---|
| Is this an abstract from experimental collaboration? | Yes |
| Name of experiment and experimental site | ATLAS |
| Is the speaker for that presentation defined? | Yes |
