Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 12: Detectors 1 (electronics)

T 12.7: Talk

Monday, March 4, 2024, 17:30–17:45, Geb. 30.23: 2/1

New amplifier-shaper discriminator chip in 65 nm CMOS technology for small-diameter muon drift-tube chambers at future hadron colliders — •Nayana Bangaru, Sergey Abovyan, Francesco Fallavollita, Oliver Kortner, Sandra Kortner, Hubert Kroha, Giorgia Proto, Robert Richter, Elena Voevodina, and Yazhou Zhao — Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Garching, Germany

Small-diameter muon drift tubes (sMDT) are used for large area muon detection in the ATLAS experiment at HL-LHC and have been proposed for muon tracking and triggering at future hadron collider experiments. sMDTs have been shown to operate with high spatial resolution and efficiency up to a gamma background count rate of 30 kHz/cm². The background count rates in the muon systems at Future Circular Colliders like the FCC-hh are expected to be 10 kHz/cm² for |η| ≤ 2.0 and up to 25 kHz/cm² at |η| ≈ 2.5.

With the new ATLAS ASD chip for operation at HL-LHC, a single tube resolution of 150 micrometers is reached at a counting rate of about 7 kHz/cm². In order to achieve the required muon angular resolution of 70 µrad at the FCC-hh, the spatial resolution needs to be improved by suppressing signal pile-up. A new ASD chip in 65nm CMOS technology has been developed with faster baseline recovery which improves the spatial resolution and increases the efficiency at high rates by reducing the dead time by 50%. Performance of the new chip was tested on a sMDT chamber at the CERN GIF++ gamma irradiation facility in comparison with the ATLAS chip.

Keywords: Frontend Electronics; Muon Detectors; ATLAS; FCC