publication . Preprint . Article . Other literature type . 2018

Effect of low temperature baking in nitrogen on the performance of a niobium superconducting radio frequency cavity

Dhakal, Pashupati; Chetri, Santosh; Balachandran, Shreyas; Lee, Peter J.; Ciovati, Gianluigi;
Open Access English
  • Published: 08 Mar 2018
Abstract
We report the rf performance of a single cell superconducting radiofrequency cavity after low temperature baking in a nitrogen environment. A significant increase in quality factor has been observed when the cavity was heat treated in the temperature range of 120–160 °C with a nitrogen partial pressure of ∼25  m Torr. This increase in quality factor as well as the Q-rise phenomenon (anti-Q-slope) is similar to those previously obtained with high temperature nitrogen doping as well as titanium doping. In this study, a cavity N_{2}-treated at 120 °C and at 140 °C showed no degradation in accelerating gradient, however the accelerating gradient was reduced by ∼25% ...
Subjects
free text keywords: Physics - Accelerator Physics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798, Doping, Niobium, chemistry.chemical_element, chemistry, X-ray photoelectron spectroscopy, Analytical chemistry, Scanning electron microscope, Penetration depth, Materials science, Nuclear magnetic resonance, Superconducting radio frequency, Atmospheric temperature range, Superconductivity
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publication . Preprint . Article . Other literature type . 2018

Effect of low temperature baking in nitrogen on the performance of a niobium superconducting radio frequency cavity

Dhakal, Pashupati; Chetri, Santosh; Balachandran, Shreyas; Lee, Peter J.; Ciovati, Gianluigi;