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May 8 – 12, 2023
Norfolk Waterside Marriott
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Preliminary Performance Study of an Alternative Calorimeter Clustering Solution for Allen in LHCb

May 9, 2023, 3:00 PM
Marriott Ballroom V-VI (Norfolk Waterside Marriott)

Marriott Ballroom V-VI

Norfolk Waterside Marriott

235 East Main Street Norfolk, VA 23510
Oral Track 2 - Online Computing Track 2 - Online Computing


Valls Canudas, Núria (La Salle URL)


The LHCb experiment has recently started a new period of data taking after a major upgrade in both software and hardware. One of the biggest challenges has been the migration of the first part of the trigger system (HLT1) into a parallel GPU architecture framework called Allen, which performs a partial reconstruction of most of the LHCb sub-detectors. In Allen, the reconstruction of the Electromagnetic Calorimeter (ECAL) sub-detector is used in many selection algorithms, but its efficiency is currently 10% lower than the full reconstruction performed in the second stage of the trigger. In this talk, we present a preliminary performance study of an alternative ECAL reconstruction algorithm implemented in Allen that complements the current algorithm to maximise the reconstruction efficiency and also minimise the impact on the throughput rate.

Consider for long presentation No

Primary authors

Valls Canudas, Núria (La Salle URL) Prof. Vilasís-Cardona, Xavier (La Salle URL) Dr Calvo Gómez, Míriam (La Salle URL) Prof. Golobardes Robé, Elisabet (La Salle URL)

Presentation materials

Peer reviewing