Study of the Readout of AC-LGAD Sensor and ALTIROC Chip Assemblies
Résumé
The development of detectors that provide high resolution in four dimensions has attracted wide-spread interest in the scientific community for a wide variety of applications. This can be achieved by leveraging new sensor designs, such as the AC-coupled Low Gain Avalanche Diode (AC-LGAD). This type of silicon detector has already shown excellent timing performances while also providing high spatial resolution and is therefore considered a promising candidate for future detectors to provide 4-dimensional measurements of particle interactions. While previous works detailed the possibility to readout these sensors using chips designed for standard (DC-)LGAD sensors, here we focus on the study of the operational specification of a complete AC-LGAD based detector. Fundamental readout parameters such as the minimum charge sensitivity, noise level, and signal jitter have been evaluated for AC-LGAD sensors designed and fabricated at the Brookhaven National Laboratory (USA). These sensors have been coupled to a fast-time ASIC, the ATLAS LGAD Timing Integrated Read-Out Chip (ALTIROC), developed by Omega/IJCLab (France) for the ATLAS timing detector at the HL-LHC. The studies shown are used as a basis for the creation and optimization of a dedicated AC-LGAD readout ASIC.
Mots clés
Strips
Semiconductor device measurement
Detectors
Jitter
Capacitance
Timing
Noise level
High-resolution
Silicon
Spatial Resolution
Particle Interactions
Sensor Design
Development Of Detection
Brookhaven National Laboratory
Avalanche Diode
Basis For The Creation
Input Signal
Arrival Time
Discrimination Thresholds
Output Of The Discriminator
detector, design
particle, interaction
dimension, 4
integrated circuit, readout
CERN LHC Coll, upgrade
noise
avalanche
spatial resolution
ATLAS
semiconductor
sensitivity
silicon
optimization
semiconductor detector
performance
resolution