1st DRD3 week on Solid State Detectors R&D

Low Gain Avalanche Detectors with deep Carbon implantation

19 Jun 2024, 16:50

20m

500/1-001 - Main Auditorium (CERN)

WG3 - Radiation Damage - Extreme Fluence WG3/WP3 - Extreme fluence and radiation damage characterization

Speaker

Yuan Feng (Chinese Academy of Sciences (CN))

Description

Low Gain Avalanche Detectors (LGADs) are crucial for high-energy physics applications, especially in the harsh radiation environments of future colliders. This talk introduces LGADs enhanced with deep carbon implantation, emphasizing their superior radiation tolerance.

LGADs achieve high temporal resolution and precise spatial measurements through an internal gain mechanism and fine structure. The deep implantation of a carbon layer significantly enhances performance by protecting the boron gain layer from deactivation caused by irradiation. This protection is critical for maintaining detector efficiency (charge collection, timing performance) and longevity.

Our proton irradiation campaign demonstrates that deep carbon implanted sensors exhibit outstanding performance, with smaller gain deterioration after 80 MeV proton radiation exposure up to $2.5\times {10}^{16}{n}_{eq}/c{m}^2$ compared with shallow Carbon implanted devices. These improvements ensure consistent and reliable operation in high-radiation environments, making LGADs with deep carbon implantation a pivotal advancement.

This presentation will delve into LGAD operation principles, merits and drawbacks of deep carbon implantation, and experimental results showcasing enhanced performance in radiation tolerance.

Presentation materials

DRD3_240619.pdf