# The LHCb VELO Upgrade detector: design, construction and installation

- Institution: CERN
- Department: Detector Seminar
- Speaker: Stefano De Capua
- Year: 2023
- Language: English
- Subjects: Art, architecture and design
- Source: [CERN](https://videos.cern.ch/record/3018802)
- 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)

During the Long Shutdown 2 of the LHC, LHCb installed a new VErtex LOcator (VELO), which replaced the one operated during Run 1 and Run 2 of the LHC. The upgraded detector consists of 52 hybrid silicon pixel modules, placed along the beam axis and divided into 2 retractable halves. The detector operates in a secondary vacuum, separated from the beam vacuum by a 150mm custom-made Aluminium foil. Each VELO modules is equipped with 4 p-on-n silicon pixel sensors, read out by 3 VeloPix ASICs with 55mm2 pixels. The new detector has also been moved closer to the beam line by a factor of 1.6, with the innermost active region now at only 5.1mm from the beams. The module assembly has started in July 2020 and completed in December 2021. The detector was then installed in the LHCb cavern during the first half of 2022 and it is currently being commissioned. The assembly of the VELO modules required high precision in many aspects. Extensive procedures for its quality assurance have been deployed. In this seminar, the challenges faced during production will be discussed, as well as the work carried out during the installation and integration in the LHCb cavern. .

0:00:00 Slide 1

0:02:20 Slide 2

0:03:51 Slide 3

0:05:02 Slide 4

0:06:25 Slide 5

0:09:34 Slide 6

0:12:30 Slide 7

0:13:36 Slide 8

0:15:32 Slide 9

0:18:43 Slide 10

0:20:30 Slide 11

0:21:48 Slide 12

0:22:49 Slide 13

0:24:03 Slide 14

0:25:26 Slide 15

0:27:02 Slide 16

0:28:04 Slide 17

0:29:50 Slide 18

0:33:02 Slide 19

0:35:44 Slide 20

0:37:09 Slide 21

0:38:45 Slide 22

0:39:56 Slide 23

0:41:23 Slide 24

0:42:42 Slide 25

0:44:29 Slide 26

0:45:57 Slide 27

0:47:47 Slide 28

0:49:43 Slide 29

0:52:24 Slide 30

0:55:15 Slide 31

0:58:49 Slide 32

1:00:06 Slide 33

1:02:35 Slide 34

1:04:29 Slide 35

## Lectures

1. [The LHCb VELO Upgrade detector: design, construction and installation](https://invisiblenetwork.ai/learn/cern/3018802/b5e32628799e), 1 h 8 min (CERN's player)