AVS 47th International Symposium
    Vacuum Technology Wednesday Sessions
       Session VT-WeP

Paper VT-WeP8
Production, Installation and Performance Evaluation of Extruded Aluminium NEG-coated Vacuum Chambers for the European Synchrotron Radiation Facility (ESRF)

Wednesday, October 4, 2000, 11:00 am, Room Exhibit Hall C & D

Session: Poster Session
Presenter: P. Chiggiato, CERN, Switzerland
Authors: P. Chiggiato, CERN, Switzerland
A. Escudeiro Santana, CERN, Switzerland
V. Ruzinov, CERN, Switzerland
R. Kersevan, ESRF, France
Correspondent: Click to Email
In order to comply with new European rules concerning the maximum allowable radiation dose for non-exposed workers, the ESRF has started a program for reducing the pressure in the undulator straight sections. This has led to the development of new narrow-gap extruded aluminium vacuum chambers coated with a Ti-Zr-V non-evaporable getter film on the whole inner wall surface. Several aluminium chambers of different dimensions have been coated and their vacuum characteristics have been evaluated. Two of them (5 m long, 74x11 mm elliptical section), have been installed onto the 6 GeV storage ring of the ESRF. Their performances during the vacuum conditioning under an intense synchrotron radiation flux of about 10@super 17@ photons sec@super -1@ m@super -1@ will be reported, together with other details of their operation.