# First experimental results with the version TOFHIR2X of the front-end ASIC of the MTD/BTL detector in the CMS experiment

- Institution: CERN
- Department: Conferences
- Speaker: Tahereh Sadat Niknejad
- Year: 2021
- Language: English
- Subjects: Physics, Engineering
- Source: [CERN](https://videos.cern.ch/record/3018146)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

TOFHIR2 is the front-end ASIC for the barrel timing layer (BTL) of the MIP timing detector for the CMS upgrade for HL-LHC, aiming at 30-60 ps resolution throughout HL-LHC lifetime. The BTL consists of LYSO:Ce crystals coupled to SiPMs which will suffer radiation damage. Relative to the first version of the front-end ASIC (TOFHIR2A), TOFHIR2X implements improved circuitry for mitigation of the SiPM dark count noise (DCR) as well as a new current mode discriminator. We present an overview of the TOFHIR2 requirements and design, simulation results and the first measurements with TOFHIR2X silicon samples associated to LYSO/SiPM prototype sensors..

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## Lectures

1. [First experimental results with the version TOFHIR2X of the front-end ASIC of the MTD/BTL detector in the CMS experiment](https://invisiblenetwork.ai/learn/cern/3018146/72ce6f4c4822), 21 min (CERN's player)