07. May 2024, 16:00 until 17:00

Marcel Himmerlich TU Wien, Cern/Switzerland

Seminar

Electron emission studies and surface technologies for particle accelerators

 

The maximum achievable intensity in a particle accelerator such as the Large Hadron Collider (LHC) is strongly dependent on a resonant phenomenon called electron cloud formation, which is linked to the generation of secondary electrons at the material surfaces that are directly facing the proton beam. The High-Luminosity LHC project has the goal to increase the luminosity of the collider by a factor of 10 compared to its original design from 2029 onward. To achieve this goal, many different technical solutions are currently being developed at CERN and at partner institutions, including technologies to mitigate electron cloud formation in critical components of the machine. Two main ingredients are relevant for pushing the limits of the surface technology for large-scale vacuum systems: 1. the development of methods that modify the surface properties and that can be either applied in already installed LHC magnets or during the preparation of new components, and 2. a deeper knowledge of the characteristics of secondary electron emission (SEE) and how it can be varied by surface treatments or material transformations. I will introduce the concepts and fundamental properties of a) functional amorphous carbon coatings by plasma deposition and b) the local roughening of surfaces via pulsed-laser ablation that both significantly reduce the SEE, and will explain the ongoing developments and requirements to implement these techniques during the next LHC shutdown [... cont].

Calendar entry

Event location

SEM.R. DB gelb 05 B
1040 Wien
Wiedner Hauptstraße 8-10/E134

 

Organiser

IAP
Manuela Marik
marik@iap.tuwien.ac.at

 

Public

Yes

 

Entrance fee

No

 

Registration required

No