24-28 February 2020
Budker Institute of Nuclear Physics
Asia/Novosibirsk timezone

A Readout System of the ALICE Fast Interaction Trigger

Not scheduled
Budker Institute of Nuclear Physics

Budker Institute of Nuclear Physics

11, akademika Lavrentieva prospect, Novosibirsk, Russia
Board: 90
Poster Electronics, Trigger and Data Acquisition


Dmitry Finogeev (INR RAS)


The ALICE experiment at the CERN LHC will install Fast Interaction Trigger detector (FIT) during the ongoing second long shutdown of the LHC (2019-2021). The new FIT detector will serve as the main luminometer and trigger detector. It will also measure the precise collision time, multiplicity, centrality and reaction plane. In order to cope with an increased interaction rate up to 1 MHz in proton-proton collisions and 200 kHz in Pb-Pb, a new readout system for the ALICE FIT detector has been designed. Event time will be measured by combined method with 13ps binning TDC THS788 and FPGA based TDC. The input charge will be integrated and measured by 12-bit 80Msps ADC. FIT readout system will allow to take data in continuous (trigger-less) and trigger (event selection by trigger) modes. Event readout selection as well as data processing done on Xilinx 7 FPGA. GBT-FPGA based readout allow to stream data up to 5.5 MHz event rate with 3.2 Mbps data rate. In this presentation we will discuss about the concept, features and performance of the digital readout system.

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