Sep 12 – 17, 2021
University of Birmingham
Europe/London timezone

Optimization of gain layer doping, profile and carbon levels on HPK and FBK sensors

Sep 14, 2021, 11:45 AM
Teaching and Learning Building (University of Birmingham)

Teaching and Learning Building

University of Birmingham

Edgbaston Campus University of Birmingham B15 2TT UK
talk Position Sensitive Fast Timing Detectors Position Sensitive Fast Timing Detectors 1


Dr Simone Michele Mazza (University of California,Santa Cruz (US))


Low Gain Avalanche Detectors (LGADs) are thin silicon detectors (ranging from 20 to 50 um in thickness) with moderate internal signal amplification (up to a gain of ~50). LGADs are capable of providing measurements of minimum-ionizing particles with time resolution as good as 17 pico-seconds. In addition, the fast rise time (~500ps) and short full charge collection time (~1ns) of LGADs are suitable for high repetition rate measurements in photon science and other fields. The first implementation of this technology will be with the High-Granularity Timing Detector (HGTD) in ATLAS and the Endcap Timing Layer (ETL) in CMS for the high luminosity upgrade at the Large Hadron Collider (HL-LHC). The addition of precise timing information from LGADs will help mitigate the increase of pile-up and improve the detector performance and physics sensitivity. Past publications have proven the vast improvement in term of radiation hardness of deep gain layer and carbon implantation in LGAD designs. In this contribution a study will be shown on the tuning of the doping concentration in the deep gain layer of HPK sensors to optimize the performance before and after radiation damage. Furthermore the effect of the combination of a deep gain layer and carbon implantation in FBK sensors will be shown alongside an optimization of the carbon concentration level. Results on electrical properties and charge collection will be shown on pre and post irradiation. Sensors were irradiated at JSI (Ljubljana, Slovenia) with neutrons and at CYRIC (KEK, Japan) with protons, then tested using the beta-scope setup and probe stations at UCSC.

Your name Simone Mazza
Institute UC Santa Cruz

Primary authors

Abraham Seiden (University of California,Santa Cruz (US)) Michal Tarka (UCSC) Dr Simone Michele Mazza (University of California,Santa Cruz (US)) Bruce Andrew Schumm (University of California,Santa Cruz (US)) Carolyn Gee (University of California,Santa Cruz (US)) Eric Ryan (University of California, Santa Cruz) Francesco Ficorella (Fondazione Bruno Kessler, via Sommarive 18, 38123, Povo (TN), Italy) Giacomo Borghi (Fondazione Bruno Kessler) Gian Franco Dalla Betta (Universita degli Studi di Trento and INFN (IT)) Giovanni Paternoster (Fondazione Bruno KEssler) Gregor Kramberger (Jozef Stefan Institute (SI)) Hartmut Sadrozinski (University of California,Santa Cruz (US)) Hartmut Sadrozinski (SCIPP, UC santa Cruz) Igor Mandic (Jozef Stefan Institute (SI)) Lucio Pancheri (University of Trento and TIFPA-INFN) Marco Ferrero (Universita e INFN Torino (IT)) Marko Mikuz (Jozef Stefan Institute (SI)) Marko Zavrtanik (Jozef Stefan Institute (SI)) Matteo Centis Vignali (FBK) Maurizio Boscardin (FBK Trento) Mohammad Nizam (University of California Santa Cruz) Nicolo Cartiglia (INFN Torino (IT)) Rene Padilla (UC Santa Cruz) Roberta Arcidiacono (Universita e INFN Torino (IT)) Valentina Sola (Universita e INFN Torino (IT)) Vladimir Cindro (Jozef Stefan Institute (SI)) Yuzhan Zhao (University of California,Santa Cruz (US))

Presentation materials