AVS 49th International Symposium
    Vacuum Technology Tuesday Sessions
       Session VT-TuM

Invited Paper VT-TuM6
Advanced Materials and Fabrication Techniques for the Next Generation Light Source

Tuesday, November 5, 2002, 10:00 am, Room C-104

Session: Novel Vacuum Materials and Pumps, Including Getters
Presenter: J.R. Noonan, Argonne National Laboratory
Authors: J.R. Noonan, Argonne National Laboratory
G.A. Goeppner, Argonne National Laboratory
J. Gagliano, Argonne National Laboratory
R.A. Rosenberg, Argonne National Laboratory
D.R. Walters, Veeco International
Correspondent: Click to Email
The next generation of light source will probably be based on electron linear accelerators using a laser driven photocathode gun. The accelerator requirement will be very stringent: very short pulses (< 100 fs, >1,000 amp peak current, and large electric accelerating gradients > 30 MeV/m). These specifications will impose new, significant requirements on the vacuum systems. For example, the cathode material in the photocathode gun not only must have high photo-electron yields, but also must withstand high laser power and high RF electric gradients. The beam tube must be fabricated to new tolerances with respect to surface finish, surface resistance, and change of cross section. The new accelerator requirements are leading the need for new materials and manufacturing technology. The talk will review research at several Free Electron Laser accelerators, and how the technology assisted the success in VUV photon emission from free electron lasers.