Highlights of the Front End Electronics work at TIFR for CMS

The Compact Muon Solenoid (CMS) Hadron Calorimeter at CERN is designed to measure accurately the energy of hadronic jets produced in proton-proton (pp) and heavy-ion collisions. It consists of different sub-systems, Barrel (HB), End-cap (HE), Outer Barrel (HO) and Forward (HF). The HB, HE, and HO sub-detectors are scintillator-based sampling calorimeters, readout with PMT's (PhotoMultiplier Tubes) and with SiPM's (Silicon Photo Multipliers) after Phase-1 upgrade. 

Our group has taken the responsibility of hardware fabrication (around 1100 multilayer electronic boards) meant for front-end electronics (FEE) upgrade as well as about 100 Calibration Units within the scope of Phase-1 upgrade. We are now also continuing to contribute for the CMS Level-1 trigger hardware electronics. The trigger and data acquisition systems of CMS experiment will continue to follow a two-level strategy while increasing the primary, hardware-level rate at Level-1 to 750 kHz and the latency to 12.5µs. It will allow, for the first time, the inclusion of the tracker and high-granularity calorimeter information at the Level-1 trigger. 

The custom-made hardware design for Level-1 trigger is based on the advanced telecommunications architecture to achieve interconnections and also using state-of-the-art FPGAs as well as serial optical links running at speeds up to 25 Gbps. 
Several types of multilayer electronic boards for the Hadron Calorimeter (HCAL) front-end electronics and several mezzanines - electronics boards incorporating system-on-chip - to be used in various subsystems of CMS experiment have been fabricated by the Indian Industries. I will be presenting the functionality, challenges in fabrication of these boards and the testing methodology using in-house set up in the lab.

About the Speaker:
Ms. Mandakini Patil did her M.Sc. Physics with Electronics from Mumbai University and taught for one year at the SIES College, Mumbai. She then joined TIFR in 1990. After initially working in the Low-temperature Physics group for about a year, she joined the Experimental High Energy Physics group, where she is now a Scientific Officer (F). She was involved in the CMS HO detector installation, commissioning and testing as well as Silicon strip detector R&D for the BELLE experiment. She is currently engaged in the CMS HCAL upgrade electronics and CMS trigger upgrade electronics.