Paper |
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WEOCA02 |
Recent Results from CTF3 Two Beam Test Stand |
1880 |
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- W. Farabolini, F. Peauger
CEA/DSM/IRFU, France
- Ch. Borgmann, J. Ögren, R.J.M.Y. Ruber
Uppsala University, Uppsala, Sweden
- R. Corsini, D. Gamba, A. Grudiev, M.A. Khan, S. Mazzoni, J.L. Navarro Quirante, R. Pan, J.R. Towler, N. Vitoratou, K. Yaqub
CERN, Geneva, Switzerland
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From mid-2012, the Two Beam Test Stand (TBTS) in the CTF3 Experimental Facility is hosting 2 high gradient accelerating structures powered by a single power extraction and transfer structure in a scheme very close to the CLIC basic cell. We report here about the results obtained with this configuration as: energy gain and energy spread in relation with RF phases and power, octupolar transverse beam effects compared with modeling predictions, breakdown rate and breakdown locations within the structures. These structures are the first to be fitted with Wake Field Monitors (WFM) that have been extensively tested and used to further improve the structures alignment on the beam line. These results show the unique capabilities of this test stand to conduct experiments with real beams.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-WEOCA02
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WEPRI002 |
Status and First Results of Two High Beta Prototype Elliptical Cavities for ESS |
2477 |
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- F. Peauger, P. Bosland, P. Carbonnier, G. Devanz, F. Éozénou, X. Hanus, P. Hardy, V.M. Hennion, J. Plouin, D. Roudier, C. Servouin
CEA/DSM/IRFU, France
- C. Darve, S. Molloy
ESS, Lund, Sweden
- L. Maurice
CEA/IRFU, Gif-sur-Yvette, France
- G. Olivier
IPN, Orsay, France
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Two prototypes of elliptical superconducting cavities have been designed and manufactured in the frame of the French-Swedish agreement for ESS. These 5-cell cavities have a beta value of 0.86 and their frequency is 704.42 MHz. The nominal accelerating gradient on the ESS accelerator is 19.9 MV/m at 2K. We present the manufacturing status of the cavities by two different vendors as well as the specific means which have been developed for the cavity treatments performed at CEA after delivery. We emphasis the activities performed on the first bare cavities recently received at CEA such as the RF measurement and tuning operations, the cleaning and chemical treatments and the clean room assembly including high pressure rinsing. Finally, first test results at 2K in vertical cryostat are reported.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRI002
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