The NA62 LAV front-end electronics and the L0 trigger generating firmware

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Beurs van Berlage

Beurs van Berlage

Poster Data-processing: 3b) Trigger and Data Acquisition Systems


Dr Francesco Gonnella (LNF (IT))


The aim of the NA62 experiment is to measure the BR(K+ -> pi+ nu nu bar) to within about 10%. The large-angle photon vetoes (LAVs) must detect particles with better than 1 ns time resolution and 10% energy resolution over a very large energy range in order to reject the dominant background. A low threshold, large dynamic range, Time-over-threshold based solution has been developed for the LAV front end electronics (LAV-FEE). Our custom 32 channel 9U board uses a pair of low threshold discriminators for each channel to produce LVDS logic signals. The achieved time resolution obtained in laboratory, coupled to an HPTDC based readout board, is ~ 150 ps. For LAV-FEE, a FPGA-based level-0 trigger providing slewing-corrected trigger time with similar precision has also been developed.

Primary authors

Antonella Antonelli (Istituto Nazionale Fisica Nucleare (IT)) Dr Francesco Gonnella (LNF (IT)) Matthew David Moulson (INFN) Dr Mauro Raggi (LNF INFN) Tommaso Spadaro (Istituto Nazionale Fisica Nucleare (IT))

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