Speaker
Description
Gaseous ionization detectors play a key role in the instrumentation of detectors for future colliders, such as muon chambers for the ATLAS experiment upgrade at the HL-LHC, as well as experiments at future electron-positron and hadron colliders, or the gaseous ionization detectors planned for the inner detectors of certain experiments at a future electron-positron collider. The need for fast amplifiers that combine precise time and dE/dx measurements for position and energy loss determination is a common requirement across all future gaseous detector applications. In this contribution, two analog ASICs designed in 65 nm TSMC CMOS technology, featuring short rise times and fast baseline recovery, are described. Test results from these ASICs, evaluated with small-diameter drift-tube chambers in a high-energy muon beam and under significant γ irradiation, are presented. These tests demonstrate significant improvements in power consumption, efficiency, and spatial resolution at counting rates as high as 1 MHz per tube, compared to ASICs previously designed for the readout of small-diameter drift-tube chambers in the ATLAS experiment at the HL-LHC. Simulation studies using Garfield also indicate that the time-over-threshold of the amplified signals from these ASICs can be utilized for dE/dx measurements, making them a promising option for the readout of gaseous ionization detectors in inner detectors where dE/dx is required for particle identification.
