Matches in SemOpenAlex for { <https://semopenalex.org/work/W76513158> ?p ?o ?g. }
Showing items 1 to 57 of
57
with 100 items per page.
- W76513158 abstract "The observation in 1989 that the Q-value of superconducting cavities fabricated from high purity niobium could significantly degrade when these cavities were kept for longer periods of time at temperatures between 50K and 200K became a major concern for accelerator projects employing superconducting cavities. A large number of investigations were carried out at various laboratories and the initial hypothesis expressed in precipitation of a niobium-hydride phase was supported by additional experimental data by other laboratories. The detrimental effect of hydrogen precipitation in niobium has been known for many years, but nevertheless the performance degradations of the cavities came as an unexpected surprise, when a rather uniform additional loss distribution over the whole cavity surface was measured on a temperature map. It was experimentally verified that the Q-degradation could be avoided, if the cavities were cooled down quickly through the dangerous temperature region; hydrogen degassing at temperatures above 700{degree}C eliminated the deterioration, but subsequent extensive chemical surface treatment seemed to reverse the process. For large scale accelerator projects like CEBAF the cryogenic system might prefer certain cooldown cycles; therefore it is of great interest to determine the exact temperature range which does not effect cavity performance, if a string of cavitiesmore » were held at these temperatures. In the following we report on the investigation of the Q-degradation of a niobium cavity under various conditions. 6 refs.« less" @default.
- W76513158 created "2016-06-24" @default.
- W76513158 creator A5000622510 @default.
- W76513158 creator A5088236896 @default.
- W76513158 date "1992-03-01" @default.
- W76513158 modified "2023-09-24" @default.
- W76513158 title "Q-degradation in high purity niobium cavities: Dependence on temperature and RRR-value" @default.
- W76513158 cites W1964801189 @default.
- W76513158 cites W1996189808 @default.
- W76513158 hasPublicationYear "1992" @default.
- W76513158 type Work @default.
- W76513158 sameAs 76513158 @default.
- W76513158 citedByCount "3" @default.
- W76513158 crossrefType "journal-article" @default.
- W76513158 hasAuthorship W76513158A5000622510 @default.
- W76513158 hasAuthorship W76513158A5088236896 @default.
- W76513158 hasConcept C107054158 @default.
- W76513158 hasConcept C113196181 @default.
- W76513158 hasConcept C119599485 @default.
- W76513158 hasConcept C121332964 @default.
- W76513158 hasConcept C127413603 @default.
- W76513158 hasConcept C153294291 @default.
- W76513158 hasConcept C178790620 @default.
- W76513158 hasConcept C185592680 @default.
- W76513158 hasConcept C191897082 @default.
- W76513158 hasConcept C192562407 @default.
- W76513158 hasConcept C2779679103 @default.
- W76513158 hasConcept C39353612 @default.
- W76513158 hasConcept C43617362 @default.
- W76513158 hasConcept C507968137 @default.
- W76513158 hasConcept C512968161 @default.
- W76513158 hasConcept C97355855 @default.
- W76513158 hasConceptScore W76513158C107054158 @default.
- W76513158 hasConceptScore W76513158C113196181 @default.
- W76513158 hasConceptScore W76513158C119599485 @default.
- W76513158 hasConceptScore W76513158C121332964 @default.
- W76513158 hasConceptScore W76513158C127413603 @default.
- W76513158 hasConceptScore W76513158C153294291 @default.
- W76513158 hasConceptScore W76513158C178790620 @default.
- W76513158 hasConceptScore W76513158C185592680 @default.
- W76513158 hasConceptScore W76513158C191897082 @default.
- W76513158 hasConceptScore W76513158C192562407 @default.
- W76513158 hasConceptScore W76513158C2779679103 @default.
- W76513158 hasConceptScore W76513158C39353612 @default.
- W76513158 hasConceptScore W76513158C43617362 @default.
- W76513158 hasConceptScore W76513158C507968137 @default.
- W76513158 hasConceptScore W76513158C512968161 @default.
- W76513158 hasConceptScore W76513158C97355855 @default.
- W76513158 hasLocation W765131581 @default.
- W76513158 hasOpenAccess W76513158 @default.
- W76513158 hasPrimaryLocation W765131581 @default.
- W76513158 hasRelatedWork W2189384879 @default.
- W76513158 hasRelatedWork W46942868 @default.
- W76513158 isParatext "false" @default.
- W76513158 isRetracted "false" @default.
- W76513158 magId "76513158" @default.
- W76513158 workType "article" @default.