The 37th RD50 Workshop (Zagreb -- online Workshop)

Session

LGADs

Nov 19, 2020, 11:20 AM

Conveners

LGADs

• Giulio Pellegrini (Centro Nacional de Microelectrónica (IMB-CNM-CSIC) (ES))
• Ivan Vila (IFCA (CSIC-UC))
• Salvador Hidalgo (Instituto de Microelectronica de Barcelona (IMB-CNM-CSIC))

2. Timing resolution on a 3D silicon pixel detector

Dario De Simone (Universitaet Zuerich (CH))

11/19/20, 11:20 AM

We report on the measurements of time resolution for double-sided 3D pixel sensors with a single cell of 50 $\mu$m $\times$ 50 $\mu$m and thickness of 285 $\mu$m, fabricated at IMB-CNM and irradiated with reactor neutrons to 8e14 MeV n$_{eq}$/cm$^2$ and then to 2.3e15 MeV n$_{eq}$/cm$^2$. Measurements were conducted using a radioactive source at a temperature of -20 and 20 \textdegree C in a...

15. Simulation and testing results of the low gain avalanche diodes developed by IHEP and IME in China

Dr Mei Zhao (Chinese Academy of Sciences (CN))

11/19/20, 11:40 AM

The ATLAS experiment High Granularity Timing Detector (HGTD) project has been approved as a part of the Large Hadrons Collider Phase-II Upgrade (HL-LHC). The Low- Gain Avalanche Detector (LGAD) with time resolution better than 50ps is the key technology to separate collisions in limited space which has been studied and researched by many institutes. This talk will present the simulation and...

12. Preliminary test results on LGAD devices

Enrico Giulio Villani (Science and Technology Facilities Council STFC (GB))

11/19/20, 12:00 PM

First batch of LGAD devices, developed by RAL, University of Oxford, University of Birmingham and Open University in collaboration with T2ev semiconductor foundry, have been designed and fabricated for fast timing applications and potential use in HGTD for ATLAS.

Up to eight different LGAD device flavours, differing in energy and dose of the implanted gain layer, have been fabricated on 6’’...

11. Status of CNM LGAD Runs

Albert Doblas Moreno

11/19/20, 12:20 PM

In this contribution, we will present our latest LGAD developments. We have completed the fabrication of two LGAD runs and another two are currently being fabricated. The 1st run, AIDA2020 v2, has already been presented at the 35th RD50 workshop, which is a repetition of the previous AIDA2020 run. We have since performed more measurements which show improved results, and these will be...

6. Preliminary USTC-1 LGAD Results and Large Array Characterization for HGTD

Mr Xiao Yang (University of Science and Technology of China (CN))

11/19/20, 12:40 PM

We will present the preliminary test results of the USTC first batch LGAD, which is designed by USTC focusing on deep implantation and carbon diffusion techniques to improve the irradiation hardness. The design follows the ATLAS-HGTD specifications with 50 um active thickness and 8-inch wafers are used. In the first prototyping run, 6 wafer splits with different gain layer dose and...

7. A summary of the radiation resistance of carbonated gain implants

Marco Ferrero (Universita del Piemonte Orientale/INFN Torino (IT))

11/19/20, 2:00 PM

A new Ultra Fast Silicon Detectors production (UFSD3.2) has been produced
by Fondazione Bruno Kessler (FBK) in Trento, in collaboration with
University of Trento and National Institute of Nuclear Physics in Turin
(INFN); this production aims to improve the radiation resistance of the
multiplication layer (gain layer).

Previous FBK-UFSD productions (UFSD2 and UFSD3) demonstrated that...

45. Characterization of CMS-ETL HPK2 LGAD samples before irradiation

Marcos Fernandez Garcia (Universidad de Cantabria and CSIC (ES))

11/19/20, 2:20 PM

19. LGAD measurements from different producers

Alissa Howard

11/19/20, 2:40 PM

The performance of latest LGAD sensor prototypes from different producers were studied before and after irradiations with neutrons. The charge collection, timing and gain layer depletion voltages were compared.

44. Efficiency estimation on irradiated LGAD with respect to sensor stability

Vagelis Gkougkousis (CERN)

11/19/20, 3:00 PM

46. Preliminary results from mortality studies conducted on the LGADs using the ELI fs-laser beam

Gordana Medin (University of Montenegro)

11/19/20, 3:20 PM

We report on the first results of a mortality campaign on the Low Gain Avalanche Detectors (LGAD) produced by Hamamatsu (HPK) as prototypes for the High-Granularity Timing Detector (HGTD) in ATLAS. The study was conducted at the ELI Beamlines site during the ELI RD50 campaign as part of the ELI User Experiment that has been recently selected from the ELI User Call proposals. The HPK-P2 (WF25)...

10. First results from thin silicon sensors for extreme fluences

Valentina Sola (Universita e INFN Torino (IT))

11/19/20, 4:00 PM

The first production of thin LGAD sensors from FBK has been completed.
The preliminary electrical characterization of sensors before irradiation will be presented and discussed.

22. Electrical and timing performance of AC-LGADs

Alessandro Tricoli (Brookhaven National Laboratory (US))

11/19/20, 4:20 PM

Low Gain Avalanche Diodes (LGADs) are characterised by a low to moderate gain (2 - 100), short rise time, high signal-to-noise ratio and exhibit excellent timing performance (30-40 ps), however fine pixelization of LGADs is difficult to achieve. To provide fine spatial resolution the AC-coupled LGAD (AC-LGAD) approach was introduced. In this type of device, the signal is capacitively induced...

4. The "1 micron" project

Nicolo Cartiglia (INFN Torino (IT))

11/19/20, 4:40 PM

Resistive readout allows designing thin sensors with a small material budget and excellent spatial resolution. In this contribution, I will present how exploiting the properties of AC-LGAD is it possible to reach a spatial precision of 1 um with large pixels (150-200 um), keeping the material budget low enough to meet the stringent requirement of the future e+e- experiments.

33. Double Sided LGADs for 5D Measurements

Ronald Lipton (Fermi National Accelerator Lab. (US))

11/19/20, 5:00 PM

We describe and simulate a concept which combines small pixels enabled by 3D sensor-electronics integration with gain produced by a Low Gain Avalanche Diode (LGAD) layer (inverted LGAD). The detector is double-sided, with electrons collected by the cathode, which provides timing information, and an anode with small pixels to provide position and angle information. The cathode can be coarse...

47. Discussion on LGADs

Giulio Pellegrini (Universidad de Valencia (ES)), Giulio Pellegrini (Centro Nacional de Microelectrónica (IMB-CNM-CSIC) (ES)), Ivan Vila (IFCA (CSIC-UC)), Salvador Hidalgo (Instituto de Microelectronica de Barcelona (IMB-CNM-CSIC))

11/19/20, 5:20 PM