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To operate optimally in the HL-LHC era, the CMS collaboration will replace the current endcap calorimeter with a High Granularity Endcap Calorimeter (HGCAL), which supports 5D information readout (space, time, energy). Each silicon module features a front-end readout board, the hexaboard, equipped with dedicated read out chips (HGCROCs) for data acquisition. Once installed in the detector, these modules must remain operational for 10–12 years without any possibility of intervention. Therefore, verifying the connectivity of each HGCROC channel to the hexaboard is crucial. To facilitate this, a charge injection board has been designed to capacitively inject a coontrolled amount of charge into each channel via the wire-bonding pads on the hexaboard. This paper summarizes the results of charge injection board testing, developed as a quality control measure for assembled hexaboards in the HGCAL project.

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Performance of the Charge Injection Board to Test the Connectivity of the HGCROC Chip with the Hexaboard

  • 会议论文

  • 发表日期：

    2025年

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  • Jasmine Chhikara,
  • Mandar Saraf,
  • Shilpi Jain,
  • Rajdeep Mohan Chatterjee,
  • Gobinda Majumder

摘要

To operate optimally in the HL-LHC era, the CMS collaboration will replace the current endcap calorimeter with a High Granularity Endcap Calorimeter (HGCAL), which supports 5D information readout (space, time, energy). Each silicon module features a front-end readout board, the hexaboard, equipped with dedicated read out chips (HGCROCs) for data acquisition. Once installed in the detector, these modules must remain operational for 10–12 years without any possibility of intervention. Therefore, verifying the connectivity of each HGCROC channel to the hexaboard is crucial. To facilitate this, a charge injection board has been designed to capacitively inject a coontrolled amount of charge into each channel via the wire-bonding pads on the hexaboard. This paper summarizes the results of charge injection board testing, developed as a quality control measure for assembled hexaboards in the HGCAL project.