Analysis of New High-Q0 SRF Cavity Tests by Nitrogen Gas Doping at Jefferson Lab [electronic resource]
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Online Access |
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| Main Authors: | , , |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. Office of Science ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2014.
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| Abstract: | In order to refine systematic understanding and establish confident process control, Jefferson Lab has joined with partners to investigate and thoroughly characterize the dramatically higher Q0 of 1.3 GHz niobium cavities first reported by FNAL in 2013[1]. With partial support from the LCLS-II project, JLab has undertaken a parametric study of nitrogen doping in vacuum furnace at 800 °C followed by variable depth surface removal in the 5 - 20 μm range. Q0 above 3×1010 are typical at 2.0 K and 16 MV/m accelerating field. We report observations from the single cell study and current interpretations. In addition to the parametric single cell study, we also report on the ongoing serial testing of six nitrogen-doped 9-cell cavities as baseline prototypes for LCLS-II. |
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| Item Description: | Published through SciTech Connect. 12/01/2014. "jlab-acc-14-1963" " doe/or/23177-3413" LINAC14, 31 August-5 September 2014, Geneva, Switzerland. Geng, Rongli; Reece, Charles E.; Palczewski, Ari D. |