• Development of indigenous silicon detector and readout electronics for forward electromagnetic calorimeter prototypes

• Fulltext

https://www.ias.ac.in/article/fulltext/pram/096/0177

• Keywords

Forward calorimeter; front-end electronics ASIC; ANUSANSKAR, ANUINDRA; large area silicon detector; small-x physics.

• Abstract

ALICE is a high-energy physics experiment at the CERN Large Hadron Collider (LHC) in Geneva, to study the properties of quark-gluon plasma, formed in heavy-ion collisions. In the upgrade program, a new electromagnetic forward calorimeter (FOCAL) based on silicon and tungsten (Si+W) sampling configuration, has been proposed to address new physics objectives of ALICE experiment.The high luminosity environment of theLHC and the requirement of compact design for the FOCAL, put stringent requirements for the development of silicon detector and front-end electronics (FEE). The ALICE-India collaboration made the first proposal for the FOCAL in the year 2008, and initiated indigenous R&D activities for silicon detectors, FEE and instrumentation. As a result,large area (40cm$^2$), segmented silicon pad sensors (6.3 cm×6.3 cm with 36 pads) and two different FEE applicationspecific integrated circuits (ASICs), ANUSANSKAR and ANUINDRA respectively, were developed. Progressive FOCAL prototypes were built using these sensors and ASICs, which have undergone test beam validation in a phased manner achieving the desired calorimetric performances, in line with the GEANT-based performancesimulations. Further, the results of the test beam experiments provided crucial inputs for achieving the technical specifications of the silicon detector and readout electronics for the final calorimeter. This manuscript presents, in a chronological order, India’s indigenous FEE ASICs, sensor and instrumentation development and reports the subsequently improved readout methodology for the prototype FOCAL detector.

• Author Affiliations

1. Bhabha Atomic Research Centre, Mumbai 400 085, India
2. Homi Bhabha National Institute, Mumbai 400 094, India
3. Variable Energy Cyclotron Centre, Kolkata 700 064, India
4. National Institute of Science Education and Research, Jatni 752 050, India
5. CERN, Geneva 23, Switzerland

• Pramana – Journal of Physics

Volume 97, 2023
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Posted on July 25, 2019