PREreviews of “Return of Experience in the Commissioning of the New CLS LINAC Injector”

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Return of Experience in the Commissioning of the New CLS LINAC Injector

by Frédéric Le Pimpec, Ward A. Wurtz, Johannes M. Vogt, Xavier Stragier, Tylor Sové, Jon Stampe, Sheldon Smith, Benjamen Smith, David Schneberger, Xiaofeng Shen, Bryan Schreiner, Brian Schneider, Shervin Saadat, Alex Rosset, Melissa A. Ratzlaff, Chelsea-Lea Randall, Emma Paulson, Alexander Nikolaichuk, Eduardo Nebot del Busto, Tyler Morhart, Thomas McKeith, Karen McKeith, Andrew McCormick, Linda Lin, Rukma Shree Kotha, Iaroslav Kolmakov, Emilio Heredia, Julia Doucette-Garr, Joshua Erikson, Brock Dube, Shawn Carriere, John Campbell, Michael Bree, Grant Bilbrough, Duane Bergstrom, Denis Beauregard, Tonia Batten, Cameron Baribeau, Johannes Hottenbacher, Peter Biegun, Benjamin Bromberger, Kai Dunkel, Marc Grewe, Björn Keune, Wolfgang Korte, Anja Kraemer, Christian Piel, and Anne Vanselow

Posted: January 7, 2026
Server: Preprints.org
DOI: 10.20944/preprints202601.0486.v1

Abstract

After approximately 60 years of service the 2856 MHz LINAC injector, of the Canadian Light Source (CLS), has been retired to make space for a new 3000.24 MHz LINAC injector, the frequency of which is a multiple of the 500.04 MHz CESR-B type superconductive radio frequency cavity used in the CLS storage ring. The new CLS LINAC injector has been designed and built by RI Research Instruments GmbH. The design is based on their robust S-band RF traveling wave accelerating structures technology, already serving other laboratories in the USA, Australia, Taiwan, Switzerland, and Sweden. In order to reduce cost and optimize space, the CLS has replaced its six accelerating RF structures, each 3.05 meters long, delivering 250 MeV electron beam with three 5.26 m long accelerating structures that will deliver the same beam energy. In order to do so, one RF structure is powered by one modulator-klystron and the last two RF structures receive their RF power from a second modulator-klystron that passes through a SLED system. The SLED system multiplies the peak power by a factor 5 to 6 and is then equally split to power each structure. We are reporting on the issues encountered during the commissioning of this new injector, on how we have tackled them and where the injector, compared to its technical specification, is standing today.

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