CERN Accelerating science

Published Articles
Report number	CERN-ACC-2017-105
Title	Trim Tuning of SPS-Series DQW Crab Cavity Prototypes
Author(s)	Verdú-Andrés, Silvia (Brookhaven Natl. Lab.) ; Baurac, Samuel (Adv. Design Consult., Lansing) ; Boulware, Charles (Adv. Design Consult., Lansing) ; Clemens, William (Jefferson Lab) ; Grimm, Terry (Adv. Design Consult., Lansing) ; McEwen, Anne (Jefferson Lab) ; Park, HyeKyoung (Old Dominion U. ; Jefferson Lab) ; Ratti, Alessandro (LBNL, Berkeley ; SLAC) ; Skaritka, John (Brookhaven Natl. Lab.) ; Wu, Qiong (Brookhaven Natl. Lab.) ; Yancey, Joe (Adv. Design Consult., Lansing)
Publication	2017
Number of pages	3
In:	8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPVA143
DOI	10.18429/JACoW-IPAC2017-MOPVA143
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN SPS
Abstract	The final steps in the manufacturing of a superconducting RF cavity involve careful tuning before the final welds to match the target frequency as fabrication tolerances may introduce some frequency deviations. The target frequency is chosen based on analysis of the shifts induced by remaining processing steps including acid etching and cool down. The baseline fabrication of a DQW crab cavity for the High Luminosity LHC (HL-LHC) envisages a first tuning before the cavity subassemblies are welded together. To produce a very accurate final result, subassemblies are trimmed to frequency in the last machining steps, using a clamped cavity assembly for RF measurements. This paper will describe the trim tuning of one of the SPS prototype DQW crab cavities fabricated by Niowave.
Copyright/License	CC-BY-3.0

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