Title :
Superconducting cavity development at Los Alamos National Laboratory
Author :
Rusnak, B. ; Gray, E.R. ; Maggs, R.G. ; Schrage, D.L. ; Shapiro, A.H. ; Spalek, G. ; Wright, P.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
Single-cell, 3 GHz cavities are being tested to refine cavity processing and assembling procedures. Certain of these results indicated a cavity contamination problem, especially after high-field operation. In this instance, the observed behavior of poorly performing cavities indicated that indium contamination may be responsible. The standard chemical polishing treatment was modified to include a 10 minute pretreatment with pure concentrated nitric acid before the standard 2 minute dip in 1, 1, 1. Preliminary results from five cavity tests indicate that this modification may decrease the number of cavity tests that fall in the lower lobe of the performance distribution.<>
Keywords :
beam handling equipment; superconducting devices; 3 GHz cavities; In contamination; Los Alamos National Laboratory; assembling procedures; cavity contamination problem; cavity processing; chemical polishing; high-field operation; lower lobe; performance distribution; pretreatment; pure concentrated nitric acid; standard 2 minute dip; superconducting cavity; Acceleration; Chemicals; Contamination; Gaussian processes; Indium; Laboratories; Magnetic fields; Niobium; Pollution measurement; Testing;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164532
