• T. Tajima, A.S. Bhatty, A. Canabal, P. Chacon, G.V. Eremeev, R.J. Roybal, J.D. Sedillo
  LANL, Los Alamos, New Mexico

Funding: DTRA

A temperature mapping system with 4608 100-ohm Allen-Bradley resistors has been built and tested at LANL. With this temperature mapping system we were able to locate lossy regions in the 1.3 GHz 9-cell SRF cavity due to field emission and direct heating. The results of the temperature mapping have been correlated with the inside surface inspection of the cavity and will be shown together with Q-E curves. A brief description of the mapping system and improvements that have been made in the recent months will also be mentioned in the paper.

• T. Tajima, A.S. Bhatty, P. Chacon, R.L. Edwards, G.V. Eremeev, F.L. Krawczyk, R.J. Roybal, J.D. Sedillo
  LANL, Los Alamos, New Mexico
• W.A. Clemens, P. Kneisel, R. Manus, R.A. Rimmer, L. Turlington
  JLAB, Newport News, Virginia

Funding: DTRA

805 MHz elliptical SRF cavities have been used for SNS as the first application for protons. At LANL, an R&D started to explore a capability of getting high-gradient cavities (40-50 MV/m) at this frequency for the future applications such as proton and muon based interrogation testing facility added to the LANSCE accelerator and a power upgrade of the LANSCE accelerator for the fission and fusion material test station. Optimized cell designs for “standard”, “low-loss” and “re-entrant” shapes, cavity test results for “standard” single-cell cavities with temperature mapping as well as surface inspection results will be presented.