# Vacuum

- Institution: CERN
- Department: CAS - CERN Accelerator School
- Speaker: Mike Seidel
- Year: 2023
- Level: Graduate
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3019559)
- Licence: [CERN](https://copyright.web.cern)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

This lecture introduces major physics and technology aspects of accelerator vacuum systems. Following an introduction, in the second section generic vacuum quantities such as pressure, gas density, the gas equation, pumping speed, conductance are introduced. Since accelerators typically have lengthy vacuum tubes, one-dimensional calculation is in many cases sufficient to compute a pressure profile for an accelerator, and methods for doing so are developed in the next section. In the fourth section accelerator specific aspects of vacuum are considered. This includes lifetime limiting effects for the particle beam, such as bremsstrahlung, elastic and inelastic scattering. Requirements for vacuum properties are derived. In the fifth section types of components and suitable materials for accelerator vacuum systems are described. Such components are for example flange systems, vacuum chambers for accelerators and the different types of pumps.

0:00:00 Slide 1

0:02:16 Slide 2

0:04:52 Slide 3

0:06:43 Slide 4

0:09:19 Slide 5

0:10:25 Slide 6

0:13:04 Slide 7

0:15:09 Slide 8

0:16:42 Slide 9

0:19:13 Slide 10

0:21:19 Slide 11

0:23:25 Slide 12

0:25:51 Slide 13

0:28:43 Slide 14

0:31:06 Slide 15

0:32:46 Slide 16

0:33:53 Slide 17

0:36:01 Slide 18

0:39:18 Slide 19

0:40:50 Slide 20

0:42:04 Slide 21

0:43:14 Slide 22

0:44:15 Slide 23

0:50:44 Slide 24

0:53:15 Slide 25

0:55:21 Slide 26

0:56:36 Slide 27

## Lectures

1. [Vacuum](https://invisiblenetwork.ai/learn/cern/3019559/9ad86c6d78aa), 59 min (CERN's player)