A. Sharma
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View article: Development of a novel low-mass module flex PCB using nano-wire-based flip-chip interconnection
Development of a novel low-mass module flex PCB using nano-wire-based flip-chip interconnection Open
The presented study introduces a novel low-mass, flexible printed circuit board (PCB) designed for the high-density integration of silicon pixel chips, utilizing a flip-chip integration strategy. The primary aim is to develop a lightweight…
View article: Pixel column issue in the ATLAS Inner Tracker modules
Pixel column issue in the ATLAS Inner Tracker modules Open
Pixel modules are currently being built for the ATLAS ITk Pixel detector upgrade. During the preproduction phase, recurring chip malfunctioning was observed during electrical testing. It was possible to bypass this issue by disabling some …
View article: Measuring the ATLAS ITk pixel detector material via multiple scattering of positrons at the CERN PS
Measuring the ATLAS ITk pixel detector material via multiple scattering of positrons at the CERN PS Open
The ITk is a new silicon tracker for the ATLAS experiment designed to increase detector resolution, readout capacity, and radiation hardness, in preparation for the larger number of simultaneous proton–proton interactions at the High Lumin…
View article: A pan-cancer atlas of therapeutic T cell targets
A pan-cancer atlas of therapeutic T cell targets Open
T-cell-based immunotherapies have revolutionized cancer treatment, yet only a minority of patients are eligible for these approaches, significantly constrained by the limited knowledge of tumor-specific antigens. Here we present ImmunoVers…
View article: Radiation Hardness of MALTA2, a Monolithic Active Pixel Sensor for Tracking Applications
Radiation Hardness of MALTA2, a Monolithic Active Pixel Sensor for Tracking Applications Open
MALTA is a depleted monolithic active pixel sensor (DMAPS) developed in the Tower Semiconductor 180 nm CMOS imaging process. Monolithic CMOS sensors offer advantages over current hybrid imaging sensors both in terms of increased tracking p…
View article: Development of novel low-mass module concepts based on MALTA monolithic pixel sensors
Development of novel low-mass module concepts based on MALTA monolithic pixel sensors Open
The MALTA CMOS monolithic silicon pixel sensors has been developed in the Tower 180 nm CMOS imaging process. It includes an asynchronous readout scheme and complies with the ATLAS inner tracker requirements for the HL-LHC. Several 4-chip M…
View article: Power efficient ReLU design for neuromorphic computing using spin Hall effect
Power efficient ReLU design for neuromorphic computing using spin Hall effect Open
We demonstrate a magnetic tunnel junction injected with spin Hall current to exhibit linear rotation of magnetization of the free-ferromagnet using only the spin current. Using the linear resistance change of the MTJ, we devise a circuit f…
View article: Performance of the MALTA telescope
Performance of the MALTA telescope Open
MALTA is part of the Depleted Monolithic Active Pixel sensors designed in Tower 180 nm CMOS imaging technology. A custom telescope with six MALTA planes has been developed for test beam campaigns at SPS, CERN, with the ability to host seve…
View article: Latest developments and characterisation results of DMAPS in TowerJazz 180nm for High Luminosity LHC
Latest developments and characterisation results of DMAPS in TowerJazz 180nm for High Luminosity LHC Open
The last couple of years have seen the development of Depleted Monolithic Active Pixel Sensors (DMAPS) fabricated in TowerJazz 180nm with a process modification to increase the radiation tolerance. While many of MAPS developments focus on …
View article: Module development for the ATLAS ITk Pixel Detector
Module development for the ATLAS ITk Pixel Detector Open
In HL-LHC operation the instantaneous luminosity will reach unprecedented values, resulting in about 200 proton-proton interactions in a typical bunch crossing. The current ATLAS Inner Detector will be replaced by an all-silicon system, th…
View article: Module development for the ATLAS Phase II Pixel Inner Tracker
Module development for the ATLAS Phase II Pixel Inner Tracker Open
The ATLAS experiment will undergo substantial upgrades to cope with the higher radiation environment and particle hit rates foreseen for HL-LHC. The phase II upgrade will include the replacement of the inner detector with a completely new …
View article: A 1-<i>μ</i>W Radiation-Hard Front-End in a 0.18-<i>μ</i>m CMOS Process for the MALTA2 Monolithic Sensor
A 1-<i>μ</i>W Radiation-Hard Front-End in a 0.18-<i>μ</i>m CMOS Process for the MALTA2 Monolithic Sensor Open
In this article, a low-power, radiation-hard front-end circuit for monolithic pixel sensors, designed to meet the requirements of low noise and low pixel-to-pixel variability, the key features to achieve high detection efficiencies, is pre…
View article: Timing performance of radiation hard MALTA monolithic pixel sensors
Timing performance of radiation hard MALTA monolithic pixel sensors Open
The MALTA family of Depleted Monolithic Active Pixel Sensor (DMAPS) produced in Tower 180 nm CMOS technology targets radiation hard applications for the HL-LHC and beyond. Several process modifications and front-end improvements have resul…
View article: A 1 μW radiation-hard front-end in a 0.18 μm CMOS process for the MALTA2 monolithic sensor
A 1 μW radiation-hard front-end in a 0.18 μm CMOS process for the MALTA2 monolithic sensor Open
Monolithic pixel sensors integrate the sensor matrix and readout in the same silicon die, and therefore present several advantages over the more largely used hybrid detectors in high-energy physics. In this paper, a low-power, radiation-ha…
View article: A 1 μW radiation-hard front-end in a 0.18 μm CMOS process for the MALTA2 monolithic sensor
A 1 μW radiation-hard front-end in a 0.18 μm CMOS process for the MALTA2 monolithic sensor Open
Monolithic pixel sensors integrate the sensor matrix and readout in the same silicon die, and therefore present several advantages over the more largely used hybrid detectors in high-energy physics. In this paper, a low-power, radiation-ha…
View article: Latest Developments and Results of Radiation Tolerance CMOS Sensors with Small Collection Electrodes
Latest Developments and Results of Radiation Tolerance CMOS Sensors with Small Collection Electrodes Open
This contribution will present the latest developments after the MALTA and Mini-MALTA sensors. It will illustrate the improvements and results of the Czochralski substrate with a bigger depletion zone to improve efficiency. It will also pr…
View article: Radiation hard monolithic CMOS sensors with small electrodes for the HL-LHC and beyond
Radiation hard monolithic CMOS sensors with small electrodes for the HL-LHC and beyond Open
The upgrade of tracking detectors for experiments at the HL-LHC and future colliders requires the development of novel radiation hard silicon sensors. We target the replacement of hybrid pixel detectors with Depleted Monolithic Active Pixe…
View article: X-Ray measurements of radiation hard monolithic CMOS sensors at Diamond Light Source
X-Ray measurements of radiation hard monolithic CMOS sensors at Diamond Light Source Open
This contribution outlines the results of investigations into the effects of radiation damage in the mini-MALTA depleted monolithic pixel sensor prototype using a micro-focus X-ray beam at Diamond Light Source. The in-pixel photon response…
View article: The Malta CMOS pixel detector prototype for the ATLAS Pixel ITK
The Malta CMOS pixel detector prototype for the ATLAS Pixel ITK Open
The ATLAS experiment is planning a major upgrade of its tracking detectors, both strip and pixel, to take full advantage of the High Luminosity LHC. A novel Monolithic Active Pixel Sensor based on 180 nm TowerJazz CMOS imaging technology, …
View article: MALTA: an asynchronous readout CMOS monolithic pixel detector for the ATLAS High-Luminosity upgrade
MALTA: an asynchronous readout CMOS monolithic pixel detector for the ATLAS High-Luminosity upgrade Open
The ATLAS collaboration is currently investigating CMOS monolithic pixel sensors for the outermost layer of the upgrade of its Inner Tracker (ITk). For this application, two large scale prototypes featuring small collection electrode have …
View article: Development of the monolithic "MALTA" CMOS sensor for the ATLAS ITK outer pixel layer
Development of the monolithic "MALTA" CMOS sensor for the ATLAS ITK outer pixel layer Open
Depleted Monolithic Active Pixel Sensors (DMAPS) are an option for the outermost layer of the upgraded ATLAS ITk Pixel Detector at the CERN LHC. Two large size DMAPS named TJ MALTA and TJ Monopix were produced in the TowerJazz 180 nm CMOS …
View article: Edge-TCT Characterisation on TowerJazz CMOS Sensor for the ITK Phase II Upgrade
Edge-TCT Characterisation on TowerJazz CMOS Sensor for the ITK Phase II Upgrade Open
The upcoming Phase II upgrade of the Large Hadron Collider (LHC) for the High Luminosity LHC requires the characterisation of new pixel sensors intended to be installed within the ATLAS experiment's inner tracker by 2024. The Edge Transien…
View article: Monolithic Pixel Development in 180 nm CMOS for the Outer Pixel Layers in the ATLAS Experiment
Monolithic Pixel Development in 180 nm CMOS for the Outer Pixel Layers in the ATLAS Experiment Open
The ATLAS experiment at CERN plans to upgrade its Inner Tracking System for the High-Luminosity LHC in 2026. After the ALPIDE monolithic sensor for the ALICE ITS was successfully implemented in a 180 nm CMOS Imaging Sensor technology, the …
View article: The phase-II ATLAS pixel tracker upgrade: Layout and mechanics
The phase-II ATLAS pixel tracker upgrade: Layout and mechanics Open
In early 2017 a new layout will be decided for the ATLAS experiment as it undergoes an upgrade of its tracking detector during the Phase-II LHC shutdown, to better take advantage of the increased luminosity of the HL-LHC. The various layou…