| Paper |
Title |
Page |
| MOPMB003 |
Flux Expulsion Lens: Concept and Measurements |
56 |
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- D.A. Turner
European Organization for Nuclear Research (CERN), Geneva, Switzerland
- A. Gallifa Terricabras, T. Koettig, A. Macpherson, G.J. Rosaz, N. Stapley
CERN, Meyrin, Switzerland
- I. González Díaz-Palacio
University of Hamburg, Hamburg, Germany
- W. Hillert
University of Hamburg, Institut für Experimentalphysik, Hamburg, Germany
- M. Wenskat
DESY, Hamburg, Germany
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A magnetic flux expulsion lens (MFEL) has been designed and built at CERN. This device uses closed topology conduction cooling of samples to quantify magnetic flux expulsion of superconductors, and allows for systematic measurements of the cooling dynamics and the magnetic response during the superconducting transition. Measurements for bulk Nb, cold worked Nb, sputtered Nb on Cu, and SIS multilayer structures are given. Preliminary results for both sample characterization of expulsion dynamics, and observation of an enhanced flux expulsion in SIS samples are also reported.
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Poster MOPMB003 [2.459 MB]
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-SRF2023-MOPMB003
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| About • |
Received ※ 27 June 2023 — Revised ※ 28 June 2023 — Accepted ※ 30 June 2023 — Issue date ※ 14 July 2023 |
| Cite • |
reference for this paper using
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| THIAA02 |
RF Performance Results of RF Double Quarter Wave Resonators for LHC High Luminosity Project |
925 |
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- K. Turaj, J. Bastard, R. Calaga, S.J. Calvo, O. Capatina, A. Castilla, M. Chiodini, C. Duval, A.V. Edwards, L.M.A. Ferreira, M. Gourragne, P. Kohler, E. Montesinos, C. Pasquino, G. Pechaud, N. Stapley, N. Valverde Alonso, J.D. Walker
CERN, Meyrin, Switzerland
- A. Castilla
JLAB, Newport News, USA
- A.V. Edwards
Lancaster University, Lancaster, United Kingdom
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The LHC High Luminosity (HL-LHC) project includes, among other key items, the installation of superconducting crab cavities in the LHC machine. The Double Quarter Wave (DQW) crab cavity will be utilised to compensate for the effects of the vertical crossing angle. Two bare DQW series cavities were manufactured in Germany by RI Research Instruments and validated successfully at CERN through a cold test at 2K. Two DQW series cavities were produced in-house at CERN, integrated into a titanium helium tank, and equipped with RF ancillaries. This paper addresses the cavities preparation processes and summarizes the results of cryogenic tests of DQW cavities at CERN
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Slides THIAA02 [10.840 MB]
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-SRF2023-THIAA02
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| About • |
Received ※ 16 June 2023 — Revised ※ 24 June 2023 — Accepted ※ 27 June 2023 — Issue date ※ 01 July 2023 |
| Cite • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
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