HO HB HE CMS HCAL Phase1* Upgrade Gilvan A. Alves CBPF/Rio For - - PowerPoint PPT Presentation

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HO HB HE CMS HCAL Phase1* Upgrade Gilvan A. Alves CBPF/Rio For - - PowerPoint PPT Presentation

Jul 25, 2023 289 likes •694 views

HO HB HE CMS HCAL Phase1* Upgrade Gilvan A. Alves CBPF/Rio For the CMS Collaboration 1 *for phase2 and other see Tizianos talk The CMS Hadron Calorimeters HB, HE, HO Tile calorimeters HPD HF Cherenkov Cal. PMT 2 Why

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CMS HCAL Phase1* Upgrade

Gilvan A. Alves – CBPF/Rio

For the CMS Collaboration

*for phase2 and other see Tiziano’s talk

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HB HE HO

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The CMS Hadron Calorimeters

– HB, HE, HO Tile calorimeters HPD – HF Cherenkov Cal. PMT

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Why Upgrade? HF

  • Identified problems

– Direct hits on HF PMT generate huge signals – OOT energy deposits generate fake signals – It only gets worse with pileup and 25ns

  • Keep the performance in high pileup 25ns

– VBF Higgs, MET

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Why Upgrade? HB/HE/HO

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Upgrade in a Nutshell

  • Main Idea

– Replace phototransducers to reduce noise and improve performance – Take advantage of new technologies to increase granularity (PFlow), add TDC information (pileup), etc. – Use as much common components as possible – Back-end installed and commissioned in parallel with CMS operations before F.E.

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Upgrade in a Nutshell

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Upgrade Schedule

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HF MAPMT

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HF work in LS1

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Components of the Upgrade HF ROBOX

– Components being shipped from Iowa – All MAPMT at CERN – 100% Base boards + adapters

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All HF MAPMTs delivered and tested

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HF MAPMTs Tests @B904

– Pedestal distributions – LED spectrums – SPE – QIE shapes

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Depth Segmentation

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SiPM R&D

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SiPM Radiation Studies

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Front-End Electronics

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Front-End control module - ngCCM

  • Requirements

– Good quality clock – Orbit signal for data sync (QIERESET) – Warning-test-enabled signal for calibration – I2C communication for GBTX, QIE10 and FE-FPGA config. – Robustness  neighbor ngCCM can take control in case of failure

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QIE10 Testing

  • Test stand @Fermilab

– Prototype test P3 & P4 tested individually – Feedback to chip designer – No major problems detected – QIE10.P5 available soon – Robotic tester can be modified for QIE10 production tests

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  • Conceptual design exists

– Cards will be combined for mechanical strength – Falling edge TDC – Work on prototype can begin when QIE10-p5 certified – Could use FPGA 8b10b link in early prototypes if GBTX not available

HF FE Card

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Back-End Electronics

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Final uHTR Development

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Parasitic Testing

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uHTR

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Trigger Primitive Improvements

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Performance of Phase1 Upgrades

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Physics Analysis VBF H

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Physics Analysis VBF H

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Physics Analysis VBF H

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Physics Analysis SUSY

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Physics Analysis SUSY

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Physics Analysis SUSY  + MET

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HCAL TDR

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Summary

  • Phase 1 Upgrade greatly improves the performance
  • f HCAL in particular in High Pileup environment
  • TDR was presented to the LHCC with very positive

feedback

  • Progress is being made in different areas
  • We are on right track
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Back-up

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Previous study -- Importance of Forward Jets in VBF Higgs search (qqH   leptons(μ or e)

The qqH signal includes forward jets which are not present in many prominent background signals.

  •  2/3 of signal would be lost without HF

coverage

  • Since many signal jets have η>3.0, HF is

essential in the VBF Higgs search

Total Jet Pairs above threshold At Least one Jet with |η|>3 (% of total) 10 GeV cut (green) 41785 32571 (78%) 20 GeV cut (red) 22252 16143 (73%) 30 GeV cut (blue) 11858 7992 (67%)

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Previous study -- Impact of HF PMT hits on QCD jets (using PMT simulation)

  • Blue line is for events reconstructed with PMT hits, red line is for same events reconstructed without

PMT hits.

  • Right plot contains the same information as the left plot but zoomed in on the tail.
  • Extra HF jets from QCD will lead to increased background to VBF

Higgs search

– Update this study to quantify difference between 2- and 4-anode

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Pt of leading jet (in HF) shows increase in hi-pt tail when PMT hits included --- pt>250 increased by 68%

Anthony Moeller

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HF Multianode PMTs

  • HF replacement PMTs have thinner windows, metal cases,

and multiple anodes : tubes will be installed in LS1

  • All will help reduce impact of charged particles passing

through the PMTs, as will the TDC capability of QIE10.Multianode techniques have been tested with both P5 and

testbeam data

  • Multianode and TDC capabilities require upgraded

electronics

  • Choice between 2-anode or 4-anode readout will be

important as a cost driver and for engineering complexity Without Clean-up With Clean-up