CONCEPTS FOR CAPACITIVELY RF-SHIELDED BELLOWS IN CRYOGENIC STRUCTURES.

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Description

Bellows are frequently required in accelerators and colliders. Usually RF-shields with spring fingers are employed to screen the bellows. The lack of accessibility in cryogenic systems can be a problem and asks for alternate solutions to eliminate possible overheating, sparking, etc that occurred in intensive beams. This note addresses an alternate kind of RF shield, which uses capacitive contact instead of mechanical contact. The analysis, as well as numerical example of a superconducting cavity structure, shows that the capacitive RF shield satisfies the impedance requirements of both beam and HOMs. The capability of thermal isolation is also analyzed.

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9 pages

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ZHAO,Y. HAHN,H. March 24, 2004.

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Description

Bellows are frequently required in accelerators and colliders. Usually RF-shields with spring fingers are employed to screen the bellows. The lack of accessibility in cryogenic systems can be a problem and asks for alternate solutions to eliminate possible overheating, sparking, etc that occurred in intensive beams. This note addresses an alternate kind of RF shield, which uses capacitive contact instead of mechanical contact. The analysis, as well as numerical example of a superconducting cavity structure, shows that the capacitive RF shield satisfies the impedance requirements of both beam and HOMs. The capability of thermal isolation is also analyzed.

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9 pages

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  • Other Information: PBD: 24 Mar 2004

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  • Report No.: BNL--72179-2004-IR
  • Grant Number: AC02-98CH10886
  • DOI: 10.2172/15007382 | External Link
  • Office of Scientific & Technical Information Report Number: 15007382
  • Archival Resource Key: ark:/67531/metadc1409365

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • March 24, 2004

Added to The UNT Digital Library

  • Jan. 23, 2019, 12:54 p.m.

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  • Jan. 25, 2019, 2:07 p.m.

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ZHAO,Y. HAHN,H. CONCEPTS FOR CAPACITIVELY RF-SHIELDED BELLOWS IN CRYOGENIC STRUCTURES., report, March 24, 2004; United States. (https://digital.library.unt.edu/ark:/67531/metadc1409365/: accessed May 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.