Paper |
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MOPVA040 |
Status of the ESS Elliptical Cryomodules at CEA Saclay |
945 |
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- P. Bosland, C. Arcambal, F. Ardellier, S. Berry, A. Bouygues, A. Bruniquel, E. Cenni, J.-P. Charrier, C. Cloué, G. Devanz, F. Éozénou, T. Hamelin, X. Hanus, P. Hardy, C. Marchand, O. Piquet, J. Plouin, J.P. Poupeau, T. Trublet
CEA/DRF/IRFU, Gif-sur-Yvette, France
- G. Costanza
Lund University, Lund, Sweden
- C. Darve
ESS, Lund, Sweden
- P. Michelato
INFN/LASA, Segrate (MI), Italy
- G. Olivier
IPN, Orsay, France
- F. Peauger
CEA/DSM/IRFU, France
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The first ESS prototype cryomodule with medium beta cavities named M-ECCTD is being assembled at CEA Saclay. The Q curves of the 4 cavities mounted inside the cryomodule are presented, and the four power couplers have been conditioned at high power before their assembly onto the cavity string. Completion of the M-ECCTD assembly outside clean room is in progress as well as the finalization of the RF power test stand preparation. RF power tests of the M-ECCTD will be performed during summer 2017. CEA is preparing the production of the ESS medium and high beta cryomodules of the series before the test of the M-ECCTD and the contracts for the procurement of the most critical components have already been signed
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-MOPVA040
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MOPVA041 |
Vertical Test Results on ESS Medium and High Beta Elliptical Cavity Prototypes Equipped with Helium Tank |
948 |
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- E. Cenni
CEA/IRFU, Gif-sur-Yvette, France
- P. Bosland, G. Devanz, F. Éozénou, X. Hanus, L. Maurice, F. Peauger, J. Plouin, D. Roudier, C. Servouin
CEA/DSM/IRFU, France
- G. Costanza
Lund University, Lund, Sweden
- C. Darve
ESS, Lund, Sweden
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The ESS elliptical superconducting Linac consists of two types of 704.42 MHz cavities, medium and high beta, to accelerate the beam from 216 MeV (spoke cavity Linac) up to the final energy at 2 GeV. The last Linac optimization, called Optimus+, has been carried out taking into account the limitations of SRF cavity performance (field emission). The medium and high-beta parts of the Linac are composed of 36 and 84 elliptical cavities, with geometrical beta values of 0.67 and 0.86 respectively. This work presents the latest vertical test results on ESS medium and high beta elliptical cavity prototypes equipped with helium tank. We describe the cavity preparation procedure from buffer chemical polishing to vertical test.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-MOPVA041
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THOBB3 |
ESS SRF Linear Accelerator Components Preliminary Results and Integration |
3666 |
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- C. Darve, N. Elias, C.G. Maiano, F. Schlander
ESS, Lund, Sweden
- C. Arcambal, G. Devanz, F. Peauger
CEA/DRF/IRFU, Gif-sur-Yvette, France
- E. Cenni
CEA/IRFU, Gif-sur-Yvette, France
- G. Costanza
Lund University, Lund, Sweden
- P. Duthil, G. Olry, D. Reynet
IPN, Orsay, France
- L. Hermansson
Uppsala University, Uppsala, Sweden
- P. Michelato, D. Sertore
INFN/LASA, Segrate (MI), Italy
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The European Spallation Source (ESS) is a pan-European project and one of world's largest research infrastructures based on neutron sources. This collaborative project is funded by a collaboration of 17 European countries and is under construction in Lund, Sweden. The 5 MW, 2.86 ms long pulse proton accelerator has a repetition frequency of 14 Hz (4 % duty cycle), and a beam current of 62.5 mA. The Superconducting Radio-Frequency (SRF) linac is composed of three families of Superconducting Radio-Frequency (SRF) cavities, which are being prototyped, counting the spoke resonators with a geometric beta of 0.5, medium-beta elliptical cavities (betag=0.67) and high-beta elliptical cavities (betag=0.86). After a description of the ESS linear accelerator layout, this article will focus on the recent progress towards integration of the first test results of the main critical components to be assembled in cryomodules, then in the ESS tunnel.
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Slides THOBB3 [25.611 MB]
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DOI • |
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※ https://doi.org/10.18429/JACoW-IPAC2017-THOBB3
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