Design and installation of a low particulate, ultrahigh vacuum system for a high power free-electron laser
- Resource Type
- Authors
- Lawrence Dillon-Townes; G. R. Myneni; M. Wiseman; H. F. Dylla; T. Siggins; E. Feldl; S. Williams; G.H. Biallas; J. Parkinson; Joseph Preble
- Source
- Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 17:2113-2118
- Subject
- Physics
Nuclear engineering
Free-electron laser
Analytical chemistry
Particle accelerator
Surfaces and Interfaces
Cryogenics
Contamination
Particulates
Condensed Matter Physics
Laser
Linear particle accelerator
Surfaces, Coatings and Films
law.invention
law
Cathode ray
- Language
- ISSN
- 1520-8559
0734-2101
A high-average power (kW) infrared (IR) free-electron laser (FEL) is currently being commissioned for the Jefferson Laboratory 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.