Speaker
Mr
P. Costa Pinto
Description
The vacuum chambers of nearly all the warm magnets of the LHC (MBXW, MQW, MSI, MSD,
etc…) will be coated with a Ti-Zr-V thin film by magnetron sputtering. The NEG
coating is necessary to provide uniform pumping speed along the chambers and to
suppress electron cloud instabilities and dynamic outgassing. The about 300 chambers
will be coated using the existing facility, developed for the production of the
standard LSS chambers, after minor modifications mainly due to the different cross
sections. In order to cope with the present installation schedule, the production
planning will allow processing of different families of chambers in parallel by using
two or three coating systems simultaneously. After a brief introduction to the
Ti-Zr-V characteristics and performances, the coating facility and strategy will be
illustrated as well as the possible conflicts due to uncertainties in the planning of
the experimental beam pipes and the standard LSS chambers.
