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Characterization of a beta=0.5 double spoke cavity with a fixed power coupler
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, FREIA.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, FREIA.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, FREIA.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, FREIA.
Vise andre og tillknytning
2019 (engelsk)Inngår i: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 927, s. 63-69Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

ESS, the European Spallation Source, will adopt a single family of double spoke cavities for accelerating the beam from the normal conducting section to the first family of the elliptical superconducting cavities. It will be the first double spoke cavities in the world to be commissioned for a high power proton accelerator. The first double spoke cavity for the ESS project was tested with high power in the HNOSS cryostat at Uppsala University. A pulse-mode test stand based on a self-excited loop was used in this test. The qualification of the cavity package involves a double-spoke superconducting cavity, a fixed fundamental power coupler, tuner, a low-level radiofrequency (LLRF) system and a high-power radiofrequency (RF) station. The test represents an important verification milestone before the module assembly. This cavity had unfortunately a high dynamic loss of 12W @ 9 MV/m, where potential causes for such a high value have been studied and corresponding suggestions are listed. This paper presents the test configuration, RF conditioning history, first high power performance and experience of this cavity package.

sted, utgiver, år, opplag, sider
2019. Vol. 927, s. 63-69
Emneord [en]
Double spoke cavity, High power test, Self-excited loop
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-382240DOI: 10.1016/j.nima.2019.02.003ISI: 000462142700008OAI: oai:DiVA.org:uu-382240DiVA, id: diva2:1316139
Forskningsfinansiär
EU, Horizon 2020, 730871Tilgjengelig fra: 2019-05-16 Laget: 2019-05-16 Sist oppdatert: 2019-05-16bibliografisk kontrollert

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Li, HanJobs, MagnusSantiago Kern, RocioGoryashko, Vitaliy A.Hermansson, LarsBhattacharyya, AnirbanLofnes, TorGajewski, KonradFransson, KjellRuber, Roger
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

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