Abstract

The NA62 experiment at CERN SPS (Super Proton Synchrotron) accelerator aims at studying Kaon decays with high precision. The high resolution Liquid Krypton (LKr) calorimeter, built for the NA48 experiment, is a crucial part of the photon-veto system; to cope with the demanding NA62 requirements, its back-end electronics had to be completely renewed. The new readout system is based on the Calorimeter REAdout Module (CREAM) , a 6U VME board whose design and production was sub-contracted to CAEN , with CERN NA62 group continuously supervising the development and production phase. The first version of the board was delivered by the manufacturer in March 2013 and, as of June 2014, the full board production is ongoing. In addition to describing the CREAM board, all aspects of the new LKr readout system, including its integration within the NA62 TDAQ scheme, will be treated.

Highlights

  • The NA62 experiment [1] at CERN SPS (Super Proton Synchrotron) accelerator aims at studying Kaon decays with high precision

  • Its main goal is the measurement of the ultra-rare decay’s branching ratio (BR), whose precise theoretical prediction within the Standard Model (SM) framework [5] has a sub-10% total error but can presently be compared with an experimental measurement based on seven candidate events [6] only

  • Kaons are identified by the Cedar, a gas-filled Cherenkov detector, with inefficiency, and their momentum and direction measured with high precision by the Gigatracker, made of 3 silicon pixel stations

Read more

Summary

THE NA62 EXPERIMENT

T HE NA62 experiment at CERN will study several Kaon decays with unprecedented statistics. Kaons are identified by the Cedar, a gas-filled Cherenkov detector, with inefficiency, and their momentum and direction measured with high precision by the Gigatracker, made of 3 silicon pixel stations. The Straw system measures the momentum of charged particles from Kaon decays. The largest BG rejection of the decay (“constrained BG”) is obtained by selecting two regions of the variable distribution, whose computation requires the high-precision measurement of the incoming. The second level trigger (L1 T) algorithm will take a L1 T decision using data collected at L0 in s and distribute the L1 T signals to the detectors that didn’t send their data to the PC farm before After this data is collected, the third trigger level algorithm (L2 T) is applied, its latency being as long as the SPS cycle.

THE NA62 LIQUID KRYPTON CALORIMETER
THE CREAM MODULE
The Analog Signal Processing
The Signal Digitisation
The Trigger Signal Processing and Output Data
THE TTC-LKR BOARD
Findings
PROJECT STATUS
Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.