The concept proposed in "Novel Calorimetry" AdV Grant formed the core of the technical design report (TDR) to build an endcap calorimeter for the upgrade of the CMS experiment at CERN. The TDR was submitted to CERN's peer review committee (the LHCC) in April 2018 and approved. Many of the results from teh work done in teh context of "Novel Calorimetery" were included. The TDR reference is CERN-LHCC-2017-023 (9 April 2018) [https://cds.cern.ch/record/2293646?ln=en]
• Validation of the physics performance and detector optimisation.
Evaluation in 2018 of a large-scale full-slice calorimeter prototype in electron and hadron test beams at CERN (Geneva, Switzerland). The results from these tests have now been published in the peer-reviewed Journal for Instrumentation (JINST) or are being prepared for publication. The titles of the papers indicate the different aspects of the technical progress that has been made.
1. Test Beam Study of SiPM-on-Tile Configurations
https://iopscience.iop.org/article/10.1088/1748-0221/16/07/P07022(s’ouvre dans une nouvelle fenêtre) 2. The DAQ System of the 12,000 Channel CMS High Granularity Calorimeter Prototype
https://iopscience.iop.org/article/10.1088/1748-0221/16/04/T04001(s’ouvre dans une nouvelle fenêtre)3. Construction and commissioning of CMS CE prototype silicon modules
https://iopscience.iop.org/article/10.1088/1748-0221/16/04/T04002(s’ouvre dans une nouvelle fenêtre)4. Charge Collection and Electrical Characterization of Neutron Irradiated Silicon Pad Detectors for the CMS High Granularity Calorimeter
https://iopscience.iop.org/article/10.1088/1748-0221/15/09/P09031(s’ouvre dans une nouvelle fenêtre) 5. Response of a CMS HGCAL silicon-pad electromagnetic calorimeter prototype to 20-300 GeV positrons
https://arxiv.org/abs/2111.06855(s’ouvre dans une nouvelle fenêtre) Accepted for publication by JINST:
6.Performance of CMS High Granularity Calorimeter prototype to charged pion beams of 20-300 GeV/c. Submitted to JINST
https://arxiv.org/abs/2211.04740(s’ouvre dans une nouvelle fenêtre)• Development, implementation and delivery of a trigger & data acquisition (DAQ) prototype. A complete HGCAL-flavour Serenity board, with full I/O capability installed. Extensive tests of the prototypes have been carried out, yielding encouraging results. Full integration is underway of these boards into the high-granularity calorimeter (HGCAL) upgrade project of the CMS experiment.
• Trigger simulation
The studies have led to the establishment of a baseline design for the CMS experiment with the validation of its anticipated performance. The design has been demonstrated to be implementable within the Serenity boards.
• Development, implementation and delivery of prototype front-end electronics
The third prototype of the front-end electronics ASIC, HGCROC3, was received in 2021 and has been evaluated. The performance has been found satisfactory, though some modifications are necessary before the launch of an engineering run which should give chips for installation in the experiment. Two chips were irradiated with encouraging results in the cold.
• Delivery of full-size pre-series Si sensors from 8” wafers by Hamamatsu (Japan)
HPK has delivered full-size 8” sensors that now meet the specifications laid down by the CMS experiment. A pre-series batch was ordered from HPK late in 2021. Delivery of the first pre-series sensors is imminent. They will be tested and irradiated before the launch of pre-production (expected by the end of 2022) of sensors destined for the installation in the experiment.
All the four items above have been developed, prototyped and adequately validated for use in the CMS experiment. We consider these developments to have fulfilled the programme laid down in the “Novel Calorimetry” Project 670406.
