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Rama Calaga (European Organization for Nuclear Research)20/05/2026, 11:00MC5.D03: Calculations of EM fields Theory and Code DevelopmentsInvited Oral Presentation
RF systems for transverse deflection, also known as crab cavities, have been considered for many accelerator facilities in the last decade. This contribution reviews their application to storage ring light sources and colliders, both circular and linear. The constraints for the implementation of crab cavities in these accelerators and the technical challenges, with a focus on the recent...
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Alex Fomin (Université Paris-Saclay, CNRS/IN2P3, IJCLab)20/05/2026, 11:30MC5.D01: Beam Optics Lattices, Correction Schemes, TransportContributed Oral Presentation
PERLE is a high-current, multi-turn Energy Recovery Linac currently entering its construction phase, being developed as a demonstrator for advanced ERL technology and future high-power electron facilities. The staged construction and commissioning schedule foresees single-turn energy recovery in 2029, with full three-turn operation planned for 2031. Achieving these milestones requires an...
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Sean Littleton (SLAC National Accelerator Laboratory)20/05/2026, 11:50MC5.D01: Beam Optics Lattices, Correction Schemes, TransportContributed Oral Presentation
The recently-commissioned Linac to End Station A (LESA) beamline was designed to deliver high-energy electrons to experiments in End Station A, such as the Light Dark Matter eXperiment (LDMX). Since LDMX requires single electrons at a high repetition rate, dark current from the 186 MHz LCLS-II electron gun provides a convenient low-current source that can be extracted parasitically from the...
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Bettina Kuske (Helmholtz-Zentrum Berlin für Materialien und Energie)20/05/2026, 12:10MC5.D02: Nonlinear Single Particle Dynamics Resonances, Tracking, Higher Order, Dynamic Aperture, Code DevelopmentsContributed Oral Presentation
The successful non-linear performance of 4th-generation light sources can be supported through a proper design of the linear lattice. However, important quantities like the injection efficiency and the beam lifetime depend on the optimization of non-linear magnetic fields like sextupoles, octupoles (and sometimes decapoles) in the lattice and therefore on numerical optimization. The underlying...
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Seongyeol Kim (Pohang University of Science and Technology)20/05/2026, 14:00MC5.D09: Emittance manipulation, Bunch Compression and CoolingInvited Oral Presentation
Manipulating phase space of the beam distribution is increasingly important not only for advanced accelerator concepts but also for X-ray free electron lasers (FELs). In the case of hadron cooling, a prime example is magnetized beams, where cross-plane correlations between two transverse phase spaces dominate the beam dynamics. Precisely controlling these cross-plane couplings—either by...
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Yoshihiro Shobuda (Japan Proton Accelerator Research Complex, Japan Atomic Energy Agency)20/05/2026, 14:30MC5.D07: High Intensity Circular Machines Space Charge, HalosInvited Oral Presentation
The RCS at J-PARC is a kicker-impedance-dominant machine, which exceeds the impedance budget from a classical viewpoint. However, we have achieved a 1-MW beam without any transverse feedback by fully utilizing the indirect space charge effect to suppress beam instabilities.
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Although the indirect space charge effect is beneficial, the beam instability can still occur in a high-intensity beam... -
Elaf Musa (Deutsches Elektronen-Synchrotron DESY)20/05/2026, 15:00MC5.D01: Beam Optics Lattices, Correction Schemes, TransportContributed Oral Presentation
Accurate lattice-optics correction is essential for achieving the design performance of modern light sources and future colliders targeting ultra-low emittances. Such machines rely on strong magnets that are highly sensitive to field and alignment errors. In this work, we investigate approaches for the correction of the linear optics of several accelerators, including PETRA IV, SOLEIL II,...
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Rachel Margraf-O'Neal (Argonne National Laboratory)20/05/2026, 15:20MC5.D09: Emittance manipulation, Bunch Compression and CoolingContributed Oral Presentation
Low-emittance microbunched electron beams are a key ingredient in free-electron lasers (FELs), facilitating gain and coherence in radiation production. It has been proposed, such as by the Compact X-ray FEL (CXFEL) group at Arizona State University, that nano-scale microbunching could be produced by rotating transverse beamlets into the longitudinal plane. Such a technique could make...
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Kiersten Ruisard (Oak Ridge National Laboratory)22/05/2026, 09:00MC5.D08: High Intensity in Linear Accelerators Space Charge, HalosInvited Oral Presentation
The speaker has experience in the modeling and measurement of high-intensity beams, including the SNS linac and BTF. Dynamics of halo formation and losses in the linac could be discussed. In addition to the unique status of SNS as the premier US intensity-frontier facility, the BTF has unique high dynamic range phase space diagnostics that enable detailed benchmarking of phase space details...
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Giuliano Franchetti (European Organization for Nuclear Research)22/05/2026, 09:30MC5.D02: Nonlinear Single Particle Dynamics Resonances, Tracking, Higher Order, Dynamic Aperture, Code DevelopmentsContributed Oral Presentation
One-dimensional resonances creating fixed points and islands in the
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two-dimensional phase space have long been
recognized as crucial for the diffusion of particles in high-intensity bunches.
Coupled resonances are also highly relevant, but their dynamics is more difficult
to grasp as it happens in a four-dimensional phase space.
Following a conceptual and theoretical investigation, a... -
Yongjun Li (Brookhaven National Laboratory)22/05/2026, 09:50MC5.D02: Nonlinear Single Particle Dynamics Resonances, Tracking, Higher Order, Dynamic Aperture, Code DevelopmentsContributed Oral Presentation
We present a new nonlinear beam dynamics analysis framework -- Approximate Invariant Analysis (AIA) -- which is based upon the construction of approximate invariants [Y. Li, D. Xu, and Y. Hao, Phys. Rev. Accel. Beams 28, 074001 (2025)] and the extraction of the betatron frequency using the Poincar\'e rotation number [S. Nagaitsev and T. Zolkin, Phys. Rev. Accel. Beams 23, 054001 (2020)]. The...
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Guido Sterbini (European Organization for Nuclear Research)22/05/2026, 10:10MC5.D02: Nonlinear Single Particle Dynamics Resonances, Tracking, Higher Order, Dynamic Aperture, Code DevelopmentsContributed Oral Presentation
In modern circular accelerators, beam mismatch at injection into non-linear lattices can play a crucial role for beam quality degradation. In this work, we explore the process of non-linear matching within the Kolmogorov–Arnold–Moser (KAM) quasi-periodic regime, focusing on how the intrinsic phase-space structure influences the evolution of initial beam distributions. Using a topological...
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