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pro vyhledávání: '"Angle, Jonathan"'
Autor:
Lechner, Eric M., Trofimova, Olga, Angle, Jonathan W., DiGuilio, Madison C., Pudasaini, Uttar
While Nb3Sn theoretically offers better superconducting RF cavity performance (Q0 and Eacc) to Nb at any given temperature, peak RF magnetic fields consistently fall short of the 400 mT prediction. The relatively rough topography of vapor-diffused Nb
Externí odkaz:
http://arxiv.org/abs/2409.01569
Autor:
Angle, Jonathan Willis
Over the last decade, the interstitial alloying of niobium has proven to be essential for enabling superconducting radiofrequency (SRF) cavities to operate more efficiently at high accelerating gradients. The discovery of "nitrogen doping" was the fi
Externí odkaz:
http://hdl.handle.net/10919/109615
Autor:
Lechner, Eric, Angle, Jonathan, Stevie, Fred, Kelley, Michael, Reece, Charles, Palczewski, Ari
Recently, Nb superconducting radio frequency cavities vacuum heat treated between 300-400 C for a few hours have exhibited very high quality factors (~5x10^10 at 2.0 K). New secondary ion mass spectrometry measurements of O, N and C show this enhance
Externí odkaz:
http://arxiv.org/abs/2106.06647
Accurate SIMS measurement of nitrogen in niobium relies on the use of closely equivalent standards, made by ion implantation, to convert nitrogen signal intensity to nitrogen content by determination of relative sensitivity factors (RSF). Accurate RS
Externí odkaz:
http://arxiv.org/abs/2012.05956
Autor:
Angle, Jonathan Willis
Titanium been used industrially for nearly a century. Ever since it was first reduced to its elemental form, concerted efforts have been made to improve the material and to reduce the cost of production. In this thesis, titanium is mechanically alloy
Externí odkaz:
http://hdl.handle.net/10919/87473
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Autor:
Reece, Charles, Angle, Jonathan, Kelley, Michael, Lechner, Eric, Palczewski, Ari, Stevie, Fred
Over the last several years, alloying of the surface layer of niobium SRF cavities has been demonstrated to beneficially lower the superconducting RF surface resistance. Nitrogen, titanium, and oxygen have all been demonstrated as effective alloying
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5595aa2d71e928d070d10cb5f2992f5a
Autor:
Lechner, Eric, Angle, Jonathan, Kelley, Michael, Palczewski, Ari, Reece, Charles, Stevie, Fred
N and O-alloyed superconducting radio frequency cavities exhibit extraordinary quality factors. Developing diffusion models that describe interstitial N and O in Nb is important for optimizing alloyed cavity quality factors and accelerating gradients
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5b8bd05dc78e8786a3ccce9dd22c45d