AVS 45th International Symposium
    Vacuum Technology Division Wednesday Sessions
       Session VT-WeA

Paper VT-WeA1
Design and Installation of a Low Particulate, Ultra-High Vacuum System for a High Power Free Electron Laser

Wednesday, November 4, 1998, 2:00 pm, Room 329

Session: Vacuum Systems and Components
Presenter: H.F. Dylla, Jefferson Lab
Authors: H.F. Dylla, Jefferson Lab
G. Biallas, Jefferson Lab
L.A. Dillon-Townes, Jefferson Lab
E. Feldl, Jefferson Lab
G.R. Myneni, Jefferson Lab
J. Parkinson, Jefferson Lab
J. Preble, Jefferson Lab
S. Williams, Jefferson Lab
M. Wiseman, Jefferson Lab
Correspondent: Click to Email
A high-average power (kW) infrared free electron laser (FEL) is currently being commissioned for the Jefferson Lab FEL User Facility. The IR FEL is driven by a unique superconducting RF linac which is recirculated to recover electron beam power that is not radiated in the FEL. The design and installation of the vacuum system for the FEL involved particular attention to minimizing particulate contamination which could cause problems with the superconducting acceleration cavities and the high power FEL optics. Particulate contamination levels of all vacuum components were monitored during the cleaning process using laser scattering. Cleaning, transport and installation procedures were developed to minimize the contamination of the complete system. We will summarize a data base we compiled of particulate contamination levels of the various components installed in the FEL vacuum system. This work supported by the U.S. DOE Contract No. DE-AC05-84-40150, the Office of Naval Research, Commonwealth of Virginia and the Laser Processing Consortium.