# INSTR'20

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

## The Upgrade of the LHCb RICH System for the LHC Run 3

27 Feb 2020, 15:10
20m
Contributed Oral Particle identification

### Speaker

Dr Antonios Papanestis (STFC - RAL)

### Description

The RICH detectors of the LHCb experiment have provided particle identification with excellent performance during Run 1 and 2 of the LHC. Currently the LHCb experiment is undergoing an upgrade to allow, starting from 2021, data collection at 5 times the instantaneous luminosity of the period 2010-2019 (up to $2 \times 10^{34}cm^{-2} s^{-2}$ ) with the aim to collect 50 fb$^{-1}$. The required upgrades to detectors and electronics are significant, with the RICH system changing all of the photon detectors and a full replacement of the upstream RICH detector. The existing Hybrid Photon Detectors (HPD) are being replaced by two types of Multi-Anode Photomultiplier Tubes (MaPMT) plus electronics capable of recording data at the full LHC collision frequency of 40 MHz. The required 3072 MaPMTs have been received from the manufacturer and have undergone detailed characterisation, measuring gain and uniformity across channels plus quantum efficiency on a smaller sample. The MaPMTs and associated electronics are currently being mounted on their mechanical support structures, and about half are ready for installation in the early part of 2020. The upstream RICH detector is also ready for the installation of the new optical elements. The status of the project will be presented.

### Primary author

Dr Antonios Papanestis (STFC - RAL)

 Slides