Conveners
SRF: SRF Programme
- Anne-Marie Valente-Feliciano (Jefferson Lab)
SRF: SRF Technologies 01
- Graeme Campbell Burt (Lancaster University (GB))
SRF: SRF Technologies 02
- Olivier Brunner (CERN)
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Mr Franck Peauger (CERN)29/06/2021, 13:00SRF
In this talk we will remind the baseline configuration of the SRF system for FCC-ee (booster and collider rings).
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We will also present new SRF cavity designs like spoke cavities and coaxial resonators, which have been explored recently and compared to the baseline design.
A new elliptical 2-cell cavity configuration equipped with slotted waveguides, called SWELL cavity is finally... -
Igor Syratchev (CERN)29/06/2021, 13:20SRF
The Slotted Waveguide ELLipltical (SWELL) cavity promises a good response to both damp the higher-order modes efficiently to avoid beam instabilities and provide high accelerating gradient. The same cavity can be used for all five operating regimes of FCC_ee. The proposed installation scenario foresees a gradual installation of cavities and a rather elegant reuse of the high RF power stations....
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Ivan Karpov (CERN)29/06/2021, 13:40SRF
The beam-cavity interaction and longitudinal instabilities may affect the choice of the RF system for high-current storage rings. In particular, beam loading, higher-order mode power losses, and coupled-bunch instabilities are the main performance limiting factors which must be considered in the early design stage. Operating the FCC-ee at the Z energy will be challenging due to the high beam...
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Robert Alan Rimmer29/06/2021, 14:00SRF
The EIC, a new collider that will be constructed at Brookhaven National Laboratory in partnership with Jefferson Lab, comprises an ion storage ring based on RHIC and an all new electron storage ring. Polarized ions are provided by an upgraded RHIC injector chain while electrons are provided by a new polarized source, linac and rapid cycling synchrotron. Luminosity will be maintained by...
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Marco Garlasche' (CERN)30/06/2021, 09:00SRF
The Hydroforming process is a well-established acquaintance in the SRF world. Recently, progress has been performed in the ability to better tune such process; namely through enhanced quality of the inherent fabrication processes, and through the implementation of large deformation numerical analyses for a finer definition of process parameters.
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Presentation will focus on the ongoing analyses... -
Said Atieh (CERN)30/06/2021, 09:20SRF
Several projects at CERN require developments of new or spare superconducting RF cavities, for the LHC consolidation, the LHC High Luminosity upgrade (HL-LHC) and the Future Circular Collider (FCC) studies.
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CERN has in recent years increased its effort into SRF technologies R&D as well as the related infrastructure. From highly technical design and fabrication engineering support to... -
Jinchi Cai (Lancaster University (GB))30/06/2021, 09:40SRF
The innovative concept of two-stage multi-beam Klystron has been previously investigated and studied in a 1GHz 20MW Klystron for CLIC. This technology utilizes low voltage electron beam in its first stage to compress the tube length and DC post acceleration in the 2nd stage to ensure ultra-high efficiency. It is very practical for the compact design at low frequency (UHF and L-band), high...
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Eric Montesinos (CERN)30/06/2021, 10:00SRF
Overview of the various challenges regarding the construction of very high power Fundamental Power Couplers will be presented.
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Anne-Marie Valente-Feliciano (Jefferson Lab)01/07/2021, 13:00
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Sebastian Keckert (Helmholtz-Zentrum Berlin)01/07/2021, 13:20SRF
Superconducting radio frequency (SRF) cavities with performance beyond the fundamental limits of bulk niobium require coating technologies. Multilayer systems with alternating thin films of superconducting and insulating material promise to boost the performance in terms of maximum accelerating gradient and surface resistance. Futhermore, the insulating layer prevents full penetration of...
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Guillaume Jonathan Rosaz (CERN)01/07/2021, 13:40SRF
Thin film coated superconducting radiofrequency (SRF) accelerating cavities are among the most promising technologies to provide a cost efficient accelerator in the framework of the Future Circular Collider (FCC) study.
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We will give a broad overview of the currently on-going R&D topics such as the optimization of surface treatment by electropolishing, the elaboration of niobium thin films by... -
Pablo Vidal Garcia (Centro de Investigaciones Energéti cas Medioambientales y Tecno)01/07/2021, 14:00SRF
Among the bases that substantiate the feasibility of the FCC, the RF characterization of scaled versions of accelerating cavities becomes one of the major milestones within the project timeline. In particular, niobium thin film cavity deposition is regarded as the main alternative to the bulk (for example, this is the technology used in the HIE-ISOLDE QWRs at CERN), leveraging the heat...
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Fabian Manke (CERN)01/07/2021, 14:15SRF
The implementation of suitable crab cavities is an important milestone for the SRF activities in the feasibility study for a hadronic FCC. The proposed Wide Open Waveguide design [1,2] achieves bunch tilting by deflecting particles in transverse TE-111 like field, optimized between two tapered ridges with a mushroom-shaped cross-section. Its eponymous large apertures furthermore reduce shunt...
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