Glow discharge cleaning of stainless steel accelerator beam tubes

Journal Article · Wed May 01 00:00:00 EDT 1985 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.572984· OSTI ID:5783080

Hseuh, H C; Chou, T S; Christianson, C A

Glow discharge cleaning has been employed successfully in the CERN ISR to eliminate beam induced pressure bumps and had been adopted as a final surface treatment for the beam vacuum system of CBA. A glow discharge cleaning facility for beam tubes up to 5.5 m in length has been constructed and is in operation. To ensure efficient and thorough cleaning of the long tubes, a residual gas analyzer was used to monitor the exhaust during cleaning. Quantitative studies of the glow discharge process were performed on several tubes by using Ar or Ar/O/sub 2/ mixture (0.1 to 10 Pa) and by varying the discharge density (< or =30 ..mu..A/cm/sup 2/). The results of the studies, such as the desorption yields of H/sub 2/O, CO, and CO/sub 2/ with respect to the accumulated dosage, the depletion of O/sub 2/ in Ar/O/sub 2/ mixture, will be reported here. The effect of venting to air and CO/sub 2/, as well as plasma deposition of carbon will also be discussed.

• Research Organization: Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 5783080
• Journal Information: J. Vac. Sci. Technol., A; (United States), Vol. 3:3
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
GLOW DISCHARGES
DESIGN
FABRICATION
SURFACE CLEANING
ISABELLE STORAGE RINGS
ACCELERATORS
STAINLESS STEELS
ALLOYS
CHROMIUM ALLOYS
CLEANING
CORROSION RESISTANT ALLOYS
ELECTRIC DISCHARGES
IRON ALLOYS
IRON BASE ALLOYS
STEELS
STORAGE RINGS
SURFACE FINISHING
430400* - Particle Accelerators- Storage Rings