AVS 53rd International Symposium
    Vacuum Technology Wednesday Sessions
       Session VT+AS-WeM

Paper VT+AS-WeM12
Summary of the 45th IUVSTA Workshop on NEG Coatings for Particle Accelerators and Vacuum Systems*

Wednesday, November 15, 2006, 11:40 am, Room 2000a

Session: Outgassing, Materials Coatings for Reduction of Outgassing
Presenter: H.C. Hseuh, Brookhaven National Laboratory
Authors: H.C. Hseuh, Brookhaven National Laboratory
K.J. Middleman, CCLRC Daresbury Laboratory, UK
O.B. Malyshev, CCLRC Daresbury Laboratory, UK
P. Manini, SAES Getters S.p.A., Italy
Correspondent: Click to Email
The 45th IUVSTA Workshop on NEG coatings for Particle Accelerators and Vacuum Systems was organized by the Accelerator Science and Technology Center (CCLRC Daresbury Laboratory, UK) and the Italian Vacuum Association. This workshop was held in Catania, Italy from April 5-8, 2006. The TiZrV NEG coating was introduced as a new technology for vacuum applications at the end of 1990s. The interest to this new technology has grown over the past 6 years since the first NEG coated vacuum chamber was installed at the ESRF (France). With conventional vacuum technology, an outgassing surface and a pump (lumped or distributed) are two different elements of a vacuum system. In comparison to this new NEG technology most surfaces of the vacuum chamber are coated with a TiZrV alloy which after activation desorbs much less than conventional materials such as stainless steel, copper and aluminium. The NEG coating also has pumping properties which results in a much low residual gas pressure. Due to a need for exchanging information between different research groups involved in the accelerator community as well as UHV pump manufacturers a dedicated workshop was set up to discuss NEG coatings. This paper summarises the main topics and discussions from the NEG workshop, those being, materials alternatives to TiZrV, production of the coating, characterisation (material science, electronic, photo-electronic and vacuum properties), problems associated with the study of NEG coatings and a final discussion on what further studies are needed for a successful vacuum system design. @FootnoteText@ Presenting author email address: hseuh@bnl.gov *Work performed under the auspicious of U.S. Department of Energy for the presenting author; and the corresponding funding agencies for co-authors.