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PS Upgrade

This document summarizes the insights from the CALO upgrade meeting led by Pascal Perret from LPC Clermont on June 22, 2010. It focuses on the upgraded electronics and functionalities of the PreShower (PS) system within the CALO framework, which includes SPD, ECAL, and HCAL components. Key points cover the electronic dynamics, trigger mechanisms, data processing, and the potential role of PS in enhancing particle identification, particularly at 40 MHz. This upgrade aims to improve electromagnetic energy measurements and handle high luminosity efficiently.

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PS Upgrade

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  1. PS Upgrade 22 June 2010 CALO UpgradeMeeting Pascal Perret LPC Clermont

  2. PreShowerFunction • Part of CALO system: SPD, PS, ECAL, HCAL • Same granularity than SPD and ECAL • 6016 cells used for: • Trigger L0: hadron /electrondifferentiation • Offline: correction of electromagneticenergymeasurement  Dynamics of the electronics: • Usefull dynamic range typically from 1 MIP to 100 MIP  10 bit ADC with LSB = 1/10 MIP Hadron Electron Threshold at  5 MIP  1 bit Pascal Perret - LPC Clermont

  3. PS Electronics Characteristics Trig • Dynamics: 10 bits and 1 trigger bit Cables 27 m Fe SEQ ADC Glue 6016 channels: 64 channels/board  100 boards chips • Processing in 2 parts: • A VFE part (analog) closed to PM: 16 chips dealing 4 channels each (sampling, signal integration, …) • A FE part (digital) in racks above the detector (27 m from VFE): 64 channels per board (ADC, calibration, previous sample residue subtraction, trigger threshold, fetching neighbourhood, SPD data processing, data storage, … ) VFE board FE board Pascal Perret - LPC Clermont

  4. Common Solutions Common Back plane ECAL, HCAL, PS/SPD FE SEQ TTC, SPECS and power Back plane (3U) Trigger and readout Back plane (6U) Glue CROC Validation or SPD Multiplicity FEB PS or ECAL ConnectorsSPD-VFE / PS Pascal Perret - LPC Clermont

  5. Role of PS/SPD at 40 MHzcf Jacques’ presentation 21/04/2010 To be done! Pascal Perret - LPC Clermont

  6. Role of PS/SPD at 40 MHzcf Frederic’s presentation 21/04/2010 • Effect on the  PID: More work to do! Pascal Perret - LPC Clermont

  7. PS Electronics @ 40MHz Trig • Probably the trigger part is no more useful … Let ‘s assume it • 40 MHz part: • VFE electronics: already exist • FE electronics: same or similar components could be used • MAPMT aging and radiation hardness to be checked … • 1MHz part: • DAQ/ECS: similar solution to XCAL electronics could be used? Fe SEQ ADC Glue chips • How many optical links? • Data compression to be studied … • Backplane could be used for optical link in/out … • Cost: similar to current version ?~ 5000€/board? VFE board FE board 1 MHz 40 MHz Pascal Perret - LPC Clermont

  8. Conclusion • It could be useful to have a PS in the LHCb upgrade project, mainly for PID • A lot of work to do: • Motivation to keep/remove the PS • Check that the VFE part could be used in high luminosity • Data compression and packing to be studied • Electronics to be studied • … • Manpower … Pascal Perret - LPC Clermont

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