NDLI: Polyhedral cavity structure for linac colliders

Content Provider	IEEE Xplore Digital Library
Author	Pogue, N. Mclntyre, P. Sattarov, A.
Copyright Year	2007
Description	Author affiliation: Texas A & M Univ., College Station (Pogue, N.; Mclntyre, P.; Sattarov, A.)
Abstract	A polyhedral superconducting cavity is being developed for possible use in linac colliders. The side view of the cavity has the ellipsoidal contour of a Tesla-type multi- cell string, yet the end view has the shape of a dodecahedron. Each of the twelve copper wedges has the TESLA contour cut out by EDM. The copper segments have refrigeration channels gun bored through them and the solid structure eliminates Lorentz detuning. A niobium foil is bonded to the inner surface of the wedge and then the twelve are assembled to create the superconducting cavity. There are no welds, and the seams between adjacent segments do not affect the high Q of the accelerating mode but at the same time block the azimuthal currents of deflecting modes. The power coupled into deflecting modes can be slot-coupled at the seams into waveguides integrated in the copper segments and conveyed to a warm termination. This open geometry makes each seg ment readily available for cleaning, polishing, inspection, and characterization. The accessibility to the surface accommodates advanced superconductors that may allow for higher gradients. The performance of these materials can be tested in a superconducting test cavity.
Starting Page	2325
Ending Page	2327
File Size	499030
Page Count	3
File Format	PDF
ISBN	9781424409167
DOI	10.1109/PAC.2007.4441238
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Linear particle accelerator Copper Superconducting materials Materials testing Shape Refrigeration Niobium Bonding Assembly Welding
Content Type	Text
Resource Type	Article

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