A rudimentary electron energy analyzer for accelerator diagnostics

We have constructed a compact, planar retarding field analyzer for the diag nostics of low-energy background electrons in a high-energy particle accele rator. Bench measurements of the analyzer have been made to characterize it , and the results are reasonable in light of models of this type of analyze r. Comparisons to results obtained using a beam-position monitor (BPM) show the advantages of this analyzer for electron diagnostics. Sample results f rom analyzers installed at the Advanced Photon Source storage ring at Argon ne National Laboratory and the Proton Storage Ring at Los Alamos National L aboratory show how the analyzers can be used for studying the intensity, en ergy, and time structure of electrons in an accelerator environment. (C) 20 00 Elsevier Science B.V. All rights reserved.