TCAD simulations of non-irradiated and irradiated low-gain avalanche diodes and comparison with measurements

2022 ◽  
Vol 17 (01) ◽  
pp. C01022
Author(s):  
T. Croci ◽  
A. Morozzi ◽  
F. Moscatelli ◽  
V. Sola ◽  
G. Borghi ◽  
...  
Keyword(s):  
Experimental Data ◽  
High Energy Physics ◽  
Signal To Noise Ratio ◽  
Damage Model ◽  
Surface Damage ◽  
High Energy ◽  
Silicon Detectors ◽  
Avalanche Diodes ◽  
Silicon Sensors ◽  
Energy Physics

Abstract In this work, the results of Technology-CAD (TCAD) device-level simulations of non-irradiated and irradiated Low-Gain Avalanche Diode (LGAD) detectors and their validation against experimental data will be presented. Thanks to the intrinsic multiplication of the charge within these silicon sensors, it is possible to improve the signal to noise ratio thus limiting its drastic reduction with fluence, as it happens instead for standard silicon detectors. Therefore, special attention has been devoted to the choice of the avalanche model, which allows the simulation findings to better fit with experimental data. Moreover, a radiation damage model (called “New University of Perugia TCAD model”) has been fully implemented within the simulation environment, to have a predictive insight into the electrical behavior and the charge collection properties of the LGAD detectors, up to the highest particle fluences expected in the future High Energy Physics (HEP) experiments. This numerical model allows to consider the comprehensive bulk and surface damage effects induced by radiation on silicon sensors. By coupling the “New University of Perugia TCAD model” with an analytical model that describes the mechanism of acceptor removal in the multiplication layer, it has been possible to reproduce experimental data with high accuracy, demonstrating the reliability of the simulation framework.

Radiation hardness of silicon detectors for high-energy physics applications

2003 ◽  
Vol 50 (4) ◽  
pp. 1121-1128 ◽  
Author(s):  
A. Candelori ◽  
D. Bisello ◽  
R. Rando ◽  
A. Kaminski ◽  
J. Wyss ◽  
...  
Keyword(s):  
High Energy Physics ◽  
High Energy ◽  
Radiation Hardness ◽  
Silicon Detectors ◽  
Energy Physics

scholarly journals Adaptive Calibration of Imaging Array Detectors

1999 ◽  
Vol 11 (6) ◽  
pp. 1281-1296
Author(s):  
Marco Budinich ◽  
Renato Frison
Keyword(s):  
Neural Networks ◽  
High Energy Physics ◽  
Infrared Imaging ◽  
High Energy ◽  
Silicon Detectors ◽  
Adaptive Calibration ◽  
Imaging Array ◽  
Array Detectors ◽  
Linear Correction ◽  
Energy Physics

We present two methods for nonuniformity correction of imaging array detectors based on neural networks; both exploit image properties to supply lack of calibrations and maximize the entropy of the output. The first method uses a self-organizing net that produces a linear correction of the raw data with coefficients that adapt continuously. The second method employs a kind of contrast equalization curve to match pixel distributions. Our work originates from silicon detectors, but the treatment is general enough to be applicable to many kinds of array detectors like those used in infrared imaging or in high-energy physics.

scholarly journals Fabrication of Silicon Sensors Based on Low-Gain Avalanche Diodes

2021 ◽  
Vol 9 ◽  
Author(s):  
Gabriele Giacomini
Keyword(s):  
Spatial Resolution ◽  
High Energy Physics ◽  
Hadron Collider ◽  
Signal Amplitude ◽  
High Energy ◽  
Fine Tuning ◽  
Good Time ◽  
Avalanche Diodes ◽  
Silicon Sensors ◽  
Fine Pitch

Low-Gain Avalanche Diodes are a recently-developed class of silicon sensors. Characterized by an internal moderate gain that enhances the signal amplitude and if built on thin silicon substrates of a few tens of microns, they feature fast signals and exhibit excellent timing performance. Thanks to their fast timing they are planned to be exploited in timing detectors in High-Energy Physics experiments, for example for the upgrades of the ATLAS and CMS detectors at the High Luminosity Large Hadron Collider (HL-LHC) at CERN. However, to achieve a spatially uniform multiplication a large pixel pitch is needed, preventing a fine spatial resolution. To overcome this limitation, the AC-coupled LGAD approach was introduced. In this type of device, metal electrodes are placed over an insulator at a fine pitch, and signals are capacitively induced on these electrodes. The fabrication technology is similar for the two LGAD families, although a fine tuning of a few process parameters needs to be carefully studied. Other R&D efforts towards detectors that can simultaneously provide good time and spatial resolution, based on the LGAD concept, are under way. These efforts aim also to mitigate the loss of performance at high irradiation fluences due to the acceptor removal within the gain layer. In this paper we describe the main points in the fabrication of LGADs and AC-LGADs in a clean-room. We also discuss novel efforts carried on related topics.

scholarly journals The Duals of Fusion Frames for Experimental Data Transmission Coding of High Energy Physics

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Jinsong Leng ◽  
Qixun Guo ◽  
Tingzhu Huang
Keyword(s):  
Experimental Data ◽  
Data Transmission ◽  
High Energy Physics ◽  
Matrix Representation ◽  
High Energy ◽  
Fusion Frames ◽  
Fusion Frame ◽  
The Matrix ◽  
Frame System ◽  
Energy Physics

The experimental data transmission is an important part of high energy physics experiment. In this paper, we connect fusion frames with the experimental data transmission implement of high energy physics. And we research the utilization of fusion frames for data transmission coding which can enhance the transmission efficiency, robust against erasures, and so forth. For this application, we first characterize a class of alternate fusion frames which are duals of a given fusion frame in a Hilbert space. Then, we obtain the matrix representation of the fusion frame operator of a given fusion frame system in a finite-dimensional Hilbert space. By using the matrix representation, we provide an algorithm for constructing the dual fusion frame system with its local dual frames which can be used as data transmission coder in the high energy physics experiments. Finally, we present a simulation example of data coding to show the practicability and validity of our results.

Sign in / Sign up

Export Citation Format

Share Document