AVS 51st International Symposium
    Vacuum Technology Tuesday Sessions
       Session VT-TuP

Paper VT-TuP7
A Comparative Analysis of Four Stanford Research Systems Quadrupole Residual Gas Analyzers Through Quantitative Helium Leak Detection Measurements

Tuesday, November 16, 2004, 4:00 pm, Room Exhibit Hall B

Session: Poster Session
Presenter: P.A. Adderley, Thomas Jefferson National Accelerator Facility
Authors: P.A. Adderley, Thomas Jefferson National Accelerator Facility
M. Poelker, Thomas Jefferson National Accelerator Facility
M.L. Stutzman, Thomas Jefferson National Accelerator Facility
G.R. Myneni, Thomas Jefferson National Accelerator Facility
Correspondent: Click to Email
Over the past 10 years, quadrupole residual gas analyzers (RGAs) have become common vacuum diagnostic instruments. Much of the proliferation of this technology throughout the scientific community is due to the high reliability and relatively low cost of the modern RGAs. Jefferson Lab uses over 70 of these devices to diagnose vacuum limitations of the Ultra High Vacuum photoemission guns, monitor hydrocarbon contamination during production of superconducting radio frequency (SRF) accelerator cavities, and monitor helium processing in the SRF cavities. By far, the dominant use of the RGAs at Jefferson Lab is for leak detection. In this paper, we compare the performance of four RGAs from Stanford Research Systems and present detailed procedures that should be used in order to routinely obtain reliable and quantitative measurements of helium partial pressure.