Speaker
Description
The Low Gain Avalanche Detector (LGAD) is a high-precision silicon-based timing detector known for its excellent signal-to-noise ratio and a typical gain of 10–50. The AC-coupled Low Gain Avalanche Detector (AC-LGAD), evolved from the LGAD, represents the latest generation of high-precision 4D detectors capable of simultaneously measuring both the time and position of particles.
We proposed a 16-channel front-end electronics readout system (FEE) for AC-LGADs. For analog part, it consisted of a radio-frequency preamplifier and a high-speed discriminator in each channel. All discriminated signals were fed to an FPGA. In the FPGA, 16 channels of Time-to-Digital Converters (TDC) were implemented, based on the tapped delay line (TDL) structure. Test results showed that ~6ps timing resolution for the TDC could be achieved.
The FEE system currently provides time-of-arrival (TOA) measurement. High-precision time-over-threshold (TOT) module is under development. With a pulse generator, the intrinsic timing resolution for the FEE is measured. The timing resolution for one channel in the FEE is about 10 ps. The timing resolution for the AC-LGAD detectors with our customized FEE can reach up ~40 ps. The resolution can be further improved after the TOT calibration in the future.
| Minioral | Yes |
|---|---|
| IEEE Member | No |
| Are you a student? | No |