An Analysis of the Temperature and Field Dependence of the RF Surface Resistance of Nitrogen-Doped Niobium SRF Cavities with Respect to Existing Theoretical Models

Conference · Tue Sep 01 00:00:00 EDT 2015

OSTI ID:1221880

Reece, Charles E. ^[1]; Palczewski, Ari D. ^[1]; Xiao, Binping ^[2]

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1. Jefferson Lab, Newport News, VA
2. Brookhaven National Laboratory, Upton, NY

Recent progress with the reduction of rf surface resistance (R_s) of niobium SRF cavities via the use of high temperature surface doping by nitrogen has opened a new regime for energy efficient accelerator applications. For particular doping conditions one observes dramatic decreases in R_s with increasing surface magnetic fields. The observed variations as a function of temperature may be analyzed in the context of recent theoretical treatments in hopes of gaining insight into the underlying beneficial mechanism of the nitrogen treatment. Systematic data sets of Q₀ vs. E_acc vs. temperature acquired during the high Q₀ R&D work of the past year will be compared with theoretical model predictions..

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1221880
• Report Number(s): JLAB-ACC-15-2050; DOE/OR/23177-3353
• Resource Relation: Conference: IPAC 2015, 3-8 May 2015. Richmond, Virginia, USA
• Country of Publication: United States
• Language: English

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43 PARTICLE ACCELERATORS