Speaker
Description
The silicon part of the High Granularity Calorimeter (HGCAL) of the CMS will have approximately 6 million readout channels. Each of these modules will be readout by a front-end board, called the hexaboard, using a dedicated readout chip called the HGAL Readout Chip (HGCROC). Before these hexaboards can be approved for use in the HGCAL post assembly, it is essential to know whether all the ball grid array (BGA) pins of the HGCROCs are properly soldered to the pads on the Hexaboard. Given the large volume of the production, nearly 30,000 hexaboards in a relatively short production cycle, a dedicated system has been designed referred to as the charge injection (CI) system using the principle of capacitive injection of an external signal on the wire-bond pads of the hexaboard to be able to meet this requirement. This system has already been used to test the pre-production batch of nearly 600 hexaboards and has performed as per expectations. In this talk we will present the design, and performance of the CI system for the quality control of these hexaboards.
| Position | Research Scholar |
|---|---|
| Affiliation | Tata Institute of fundamental research |
| Country | India |
