Development and characterization of a large area silicon pad array for an electromagnetic calorimeter

Abstract

We present the research and development work of the first version of a 6×6 array of silicon pad detectors, carried out in India, for the proposed forward calorimeter (FOCAL) as part of the ALICE collaboration upgrade program at CERN. The primary motivation is to develop a large area silicon pad array realizing the challenging requirements of high-energy physics experiments such as low leakage current, high breakdown voltage and evaluate its performance as an active layer in the prototype silicon tungsten (Si-W) electromagnetic (EM) calorimeter. Towards these goals, a 36-pad silicon sensor with an individual pad size of ∼1 cm2 is designed on a 4-inch high resistivity N-type wafer and fabricated at Bharat Electronics Limited, Bangalore. The sensors have been used to assemble the prototype Si-W calorimeters and were successfully tested with high-energy particle beams. The design and development of the large area silicon sensor and its characterization using radioactive sources in the laboratory and high-energy particle beams are reported in this paper.

Ion Microprobe Study of the Polarization Quenching Techniques in Single Crystal Diamond Radiation Detectors

“…Semiconductor particle detectors based on silicon are essential in most modern high energy physics experiments, synchrotron imaging applications, etc. [ 1 , 2 ], however, new frontiers in physics, such as those found in nuclear reactors or in outer space, will exceed the limits or even disable some radiation diagnostics [ 3 ]. Finding an alternative to current detection systems is crucial for use in the working conditions of new hostile environments with harsh radiation and high temperature [ 4 ].…”