Conveners
Afternoon session: Test Stands
- Wencheng Fang
Afternoon session: Breakdown and theory I
- Evgenya Simakov (LANL)
Afternoon session: Breakdown and theory II
- Matteo Volpi (The University of Melbourne)
Afternoon session: Cheese & Wine
- There are no conveners in this block
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Claudio Di Giulio (Istituto Nazionale di Fisica Nucleare)17/10/2023, 14:50Oral
The TEX facility has been commissioned for high-power testing to characterize radio frequency structures and components and to validate them for operation on future particle accelerators for medical, industrial, and research applications. To this end, TEX is directly involved in the LNF’s leading project EuPRAXIA@SPARC_Lab. A brief description of the facility commissioning, its status, and...
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Ronald Agustsson (RadiaBeam)17/10/2023, 15:10Oral
RadiaBeam has developed C-band testing infrastructure to support a diverse array of structure and beam testing programs. The core capabilities revolve around a pair of E37212 Canon klystrons driven by K300 Scandinova modulators delivering 1.2us, 100Hz operation with peak RF powers of 25MW and 50MW. The infrastructure includes multiple phase shifter power splitters and high directivity...
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Paul Giansiracusa (The University of Melbourne)17/10/2023, 15:30Oral
The baseline design of the compact linear collider (CLIC) requires high gradient accelerating structures operating at 12 GHz with accelerating gradients of 100 MV/m. To demonstrate the feasibility and optimise the performance of these structures several x-band test facilities, x-Box 1, 2 and 3 have been operating at CERN.
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A new test facility will come online at the x-band laboratory for... -
Nuria Catalan Lasheras (CERN)17/10/2023, 15:50Oral
A summary of the relevant activities in the CERN X-band RF facilities related to high gradient and high efficiency RF
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Pedro Morales (CERN)17/10/2023, 16:10Oral
The design and manufacturing of X-band, high-gradient structures have steadily developed in recent times beyond their original use in high-energy physics. After years of development and collaborations, the initial phase of validation regarding the viability of the machines and their operation has moved to focus on a more practical area. This new area focuses on manufacturing techniques,...
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Fabio Bosco (UCLA)18/10/2023, 14:50Oral
High gradient electron linacs are a key ingredient for advanced accelerator applications ranging from particle-driven radiation sources to lepton colliders. The overall performance of such machines strongly relies on the quality of the electron beams they transport and accelerate. In particular, due to the high phase space density, the dynamics of high brightness beams are affected by strong...
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Tetsuo ABE (High Energy Accelerator Research Organization (KEK))18/10/2023, 15:10Oral
There are various hypotheses for vacuum breakdown trigger mechanisms in normal-conducting accelerating structures. It has been experimentally turned out that the dominant trigger of RF breakdowns in normal-conducting UHF CW cavities is a hot micro-particle with a high sublimation point [Phys. Rev. Accel. Beams 21, 122002 (2018)], later named a "fireball" by this presenter. In principle, this...
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Mareike Wendelmuth (CERN)18/10/2023, 15:30Oral
After fabrication, high-gradient structures need to be conditioned to provide high gradients of 100 MV/m, and sustain even higher gradients at the copper surfaces, while achieving a breakdown rate below $3*10^{-7}$ BD/pulse. Estimating the energy unaccounted for during a breakdown may be important in order to avoid damage to the structure as well as to understand the breakdown process itself....
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Javier Olivares Herrador (CERN)18/10/2023, 15:50Oral
RF-Track is a CERN-developed particle tracking code that can simulate any particle species' acceleration and tracking. RF-Track tracks particles in time or in space through field maps and conventional elements and considers a large set of single-particle and collective effects: space-charge, beam-beam, short- and long-range wakefield effects, synchrotron radiation emission, multiple Coulomb...
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Gerard Lawler (UCLA)18/10/2023, 16:10Oral
High gradient RF cavities, especially those at frequencies above S-band, are critical in several concepts for future electron linacs such as the ultra-compact X-ray free electron laser (UCXFEL) and the Cool Copper Collider ($C^3$). These two designs in particular rely on the cryogenic operation of RF cavities, taking advantage of several complementary physical effects. It is then advantageous...
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Pablo Martinez-Reviriego (Instituto de Fisica Corpuscular (IFIC))18/10/2023, 17:00Oral
Dielectric Assist Accelerating (DAA) structures based on ultralow-loss ceramic are being studied as an alternative to conventional disk-loaded copper cavities. This accelerating structure consists of dielectric disks with irises arranged periodically in metallic structures working under the TM02$-\pi$ mode.
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Here, the numerical design of an S-band DAA structure for low beta particles, such as... -
Lee Millar (CERN)18/10/2023, 17:20Oral
In 2020, following a successful commissioning period, CERN’s linear accelerator 4 (Linac4) became the proton source for the CERN accelerator complex. The first RF accelerating structure in Linac4 is a 3 m long Radio-Frequency Quadrupole (RFQ) which operates with an inter-vane voltage of 78 kV and a peak surface electric field of 34 MV/m.
To monitor the cavity field profile, the RFQ is...
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Xueying Lu (Northern Illinois Univ / Argonne National Laboratory)18/10/2023, 17:40Oral