Non Evaporable Getter thin films for Particles Accelerators

by Pedro Costa Pinto (CERN)

Wednesday 3 Apr 2019, 16:00 → 17:00 Europe/Zurich

PSI

Non evaporable Getter (NEG) are used in particle accelerators since the 80’s. At the end of the 90’s, CERN developed a NEG in the form of a thin film that can be activated during the bakeout of the vacuum chambers. More than 3 km of the Large Hadron Collider are coated with this material, providing a low secondary electron yield, reduced outgassing and distributed vacuum pumping along the beam lines. NEG coatings are nowadays applied in many particle accelerators worldwide, particularly in synchrotron light sources, as part of their vacuum system.

After an introduction to NEG thin films and their properties, we will address the production and characterization: stoichiometry, thickness uniformity, adhesion, reduction of oxides, pumping speed and photon stimulated desorption. A particular emphasis will be given to the impact of the film thickness on its properties.

For more details, contact Romain Gantner at ext. 5279

2019_NEG_thin_films_for_Particles_Accelerators_PSI.pdf