Speaker
Description
Low-Gain Avalanche Diodes (LGADs) are advanced silicon sensors developed for the fast and precise detection of minimum ionizing particles (MIPs), offering promising performance for certain applications in high-energy physics experiments. Fabricated on thin silicon wafers—typically ranging from 20 to 50 microns in thickness—with internal gain that results in a high signal-to-noise ratio (SNR), they enable exceptional timing resolution. These characteristics make LGADs particularly attractive for 4D tracking applications in future collider environments, such as the High-Luminosity Large Hadron Collider (HL-LHC) and the planned Electron-Ion Collider (EIC), where fine spatial and temporal resolution is critical for disentangling high pile-up events, studying complex collision dynamics and particle identification.
LGADs produced by Brookhaven National Laboratory (BNL) have been studied in detail in this work, focusing on devices fabricated on 20 μm and 30 μm thick substrates. Comprehensive electrical characterization confirms stable gain layers and low leakage currents, while charge collection studies using the Transient Current Technique (TCT) demonstrate uniform signal response across the sensor surface. Time-resolution measurements performed with fast laser systems reveal timing performance on the order of tens of picoseconds (ps). Future radiation damage studies using high-fluence proton beams are planned to evaluate the long-term performance and address known limitations in radiation hardness.
| Workshop topics | Detector systems |
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