Conveners
SRF: Directions for R&D
- Frank Marhauser (JLAB)
SRF: Cavity technology
- Cristian Pira (LNL-INFN)
SRF: Studies
- Anne-Marie Valente-Feliciano (Jefferson Lab)
SRF: Innovation
- Olivier Brunner (CERN)
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Jiyuan Zhai (IHEP)10/04/2018, 08:30SRF
CEPC is a 100 km double-ring circular electron-positron collider operating at 90-240 GeV center-of-mass energy of Z-pole, WW pair production threshold, and Higgs resonance. The conceptual design report (CDR) of CEPC will be completed in mid-2018 as an important step to move the project forward. In this talk, the CDR layout design and configuration of CEPC superconducting RF system will be...
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Andy Butterworth (CERN)10/04/2018, 08:45SRF
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Ivan Karpov (CERN)10/04/2018, 09:00SRF
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36. Accelerating cavity and HOM coupler design study for the Higgs and top operation modes of FCC-eeShahnam Gorgi Zadeh (Rostock University (DE))10/04/2018, 09:15SRF
The design study for the future circular collider (FCC) includes an electron-positron collider with beam energies ranging from 45.6 to 182.5 GeV in order to study the properties of the Z, W and H bosons and the top quark with high precision. In order to accelerate the particles to the required energy, an RF system is needed to provide the accelerating voltage for the four machine setups....
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Wolfgang Hofle (CERN)10/04/2018, 09:30SRF
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Martina Martinello (Fermilab - IIT)10/04/2018, 10:30SRF
Superconducting accelerating cavities are the technology of choice for many modern and future particle accelerators. Increasing their efficiency is therefore crucial to minimize the power consumption during their operation and therefore significantly cut the cost and enabling the realization of more powerful machines.
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The efficiency of niobium superconducting RF cavities can be maximized in... -
Katsiaryna Ilyina-Brunner (CERN)10/04/2018, 10:48SRF
Niobium coated copper accelerating cavities have demonstrated their strong potential in accelerators such as LEP, LHC and HIE-ISOLDE and could become a technology of choice for such a machine as the FCC.
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On the way of further improving thin-film coated copper cavities performances one proposes to substitute niobium by a superconductor that could lead to a higher quality factor as well as a... -
Guillaume Jonathan Rosaz (CERN)10/04/2018, 11:06SRF
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Anne-Marie Valente-Feliciano (Jefferson Lab)10/04/2018, 11:24SRF
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Frank Marhauser (JLAB)10/04/2018, 11:42SRF
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Cristian Pira (LNL-INFN)10/04/2018, 13:30SRF
A key challenge for the next accelerators is the cost reduction. Bulk niobium cavities performances are closer to their theoretical limits and an alternative technology is mandatory. Niobium thin film copper cavities are the most explored solution, but the Q-slope problem, characteristic of these resonators, limits the applications where high accelerating fields are requested.
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In this work an... -
Alexander Lunt (CERN)10/04/2018, 13:50SRF
In order to achieve the performance required for the Future Circular Collider (FCC) Superconducting Radio Frequency (SRF) cavities, new superconducting thin films are being investigated. The functionality of the cavities are particularly dependent upon the reliability of these films at the micro and nanoscale. Therefore, in order to gain insight into their characteristics, the advanced...
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Marco Arzeo (CERN)10/04/2018, 14:10SRF
Niobium on Copper (Nb/Cu) is being considered as the current technology of choice for the realization of superconducting radio frequency (SRF) accelerating cavities for the future circular collider (FCC). It provides, in fact, a significant reduction of the costs involved [1]. This conclusion assumes the feasibility of niobium coated copper cavities with RF performances at T=4.5 K and 400 MHz,...
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Carolina Abajo Clemente (CERN)10/04/2018, 14:30SRF
In the framework of the FCC study, niobium-coated copper cavities are considered to operate at 400 MHz. Electrohydraulic forming (EHF) is a potential alternative to conventional shaping methods of copper half cells, through which geometrical precision, a good repeatability and a reduced spring back can be achieved.
Material characterisation by hardness measurements, Electron Backscatter...
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Peng Sha (IHEP, CAS (China))10/04/2018, 15:30SRF
Recently, nitrogen doping (N-doping) technology has been proved to increase Q value of superconducting cavity obviously, which lowers the BCS resistance of Nb. After N-doping, Q of 9-cell 1.3 GHz cavity can be increased to 3E10 at Eacc = 16 MV/m, while 1.5*1010 without N-doping. Since 2013, there have been over 60 cavities nitrogen doped at FNAL, JLAB and Cornell. The Circular Electron...
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Alexej Grudiev (CERN)10/04/2018, 15:50SRF
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Romain Gerard (CERN)10/04/2018, 16:10SRF
"Superconducting Radio Frequency (SRF) components made of bulk niobium could profit from the novel shapes, parts number reduction of assemblies, and cost and lead time decrease from Additive Manufacturing with Selective Laser Melting (SLM). However, pure niobium is not available on this technology thus far. In the framework of FCC Special Technologies, a project aims at developing pure niobium...
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Jinchi Cai (CERN)10/04/2018, 16:30SRF
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Cristian Pira (LNL-INFN)SRF
A key challenge for the next accelerators is the cost reduction. Bulk niobium cavities performances are closer to their theoretical limits and an alternative technology is mandatory. Niobium thin film copper cavities are the most explored solution, but the Q-slope problem, characteristic of these resonators, limits the applications where high accelerating fields are requested.
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In this work an...