Name: Space Charge 2026, 7th ICFA BD Mini-workshop
Start: 2026-09-29T17:00:00+01:00
End: 2026-10-03T14:00:00+01:00
Location: Oxford University, Physics Department

Space Charge 2026, 7th ICFA BD Mini-workshop

from Tuesday, 29 September 2026 (17:00) to Saturday, 3 October 2026 (14:00)

Monday, 28 September 2026
Tuesday, 29 September 2026
17:00 Workshop Registration (Refreshments and Poster Setup) - Shinji Machida Kim Proudfoot Adrian Oeftiger (University of Oxford)
Workshop Registration (Refreshments and Poster Setup)
- Shinji Machida
- Kim Proudfoot
- Adrian Oeftiger (University of Oxford)
17:00 - 18:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre Refreshments will be available. Poster contributions may be set up in the Fisher Room at the main workshop venue, the Denys Wilkinson Building.
Wednesday, 30 September 2026

08:00 Welcome
Welcome
08:00 - 08:25
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
08:30 General: Workshop Introduction
Workshop Introduction
08:30 - 08:45
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

08:30 Welcome - Adrian Oeftiger (University of Oxford) Shinji Machida
08:45 A: Performance Review of Space-Charge-Limited Facilities
Performance Review of Space-Charge-Limited Facilities
08:45 - 10:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

08:45 Lead talk: Performance Review of Space-Charge-Limited Facilities - Foteini Asvesta (CERN)

09:05 Beam loss Minimization by well Mitigating the Space Charge effect at 1.5 MW beam power at J-PARC RCS - Pranab Saha (J-PARC/JAEA)

09:20 High-intensity challenges and progress in the HIAF project - Guodong Shen (Institute of Modern Physics, Chinese Academy of Sciences)

09:35 High-Intensity Performance and Limits in the Fermilab Main Injector and Recycler - Robert Ainsworth (Fermi National Accelerator Laboratory)

09:50 Recent progress of the high-intensity beam commissioning in CSNS RCS - Yaoshuo Yuan (IHEP/CSNS)

10:05 Discussion Session A-1 - Foteini Asvesta (CERN)
10:30 Morning Coffee Break
Morning Coffee Break
10:30 - 11:00
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
11:00 B: High-Intensity Ring Design
High-Intensity Ring Design
11:00 - 12:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

11:00 Lead talk: High-Intensity Ring Design - Robert Williamson

11:20 Local correction of nonlinear space-charge effects by ring lattice design - Takaaki Yasui (KEK)

11:35 Designing experiments to study beam dynamics at high space charge intensities in the SNS accumulator ring - Austin Hoover (Oak Ridge National Laboratory)

11:50 Impacts of Tune Asymmetry on the Space Charge Limit in High Intensity Circular Accelerators - Joshua Appleby (University of Oxford)

12:05 Discussion Session B-4 - Robert Williamson
12:30 Lunch Break with Posters
Lunch Break with Posters
12:30 - 13:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
13:30 C: Resonances and Space Charge
Resonances and Space Charge
13:30 - 15:15
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

13:30 Lead talk: Resonances and Space Charge - Giuliano Franchetti

13:50 Resonance Studies in the SPS for High-Brightness Beams. - Ingrid Mases Sole (CERN)

14:05 Study of beam redistribution on approach to the half integer resonance with space charge and the implications for ISIS RCS operations - Chris Warsop

14:20 Space charge simulation for the third order resonance corrections at J-PARC MR - Susumu Igarashi (High Energy Accelerator Research Organization (KEK))

14:35 Space Charge Effects in a Ring-Based Electron Cooler - Sergey Seletskiy

14:50 Discussion Session C-1 - Giuliano Franchetti
15:15 Afternoon Coffee Break
Afternoon Coffee Break
15:15 - 15:45
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
15:45 A: Space-Charge Measurement and Compensation Studies, Part 1 of 2
Space-Charge Measurement and Compensation Studies, Part 1 of 2
15:45 - 16:35
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

15:45 Lead talk: Space-Charge Measurement and Compensation Studies - Giulio Stancari (Fermilab / UChicago)

16:05 Experimental Studies of Space Charge and Collective Beam Instabilities with the Fermilab Recycler Waker System - Cristhian Gonzalez-Ortiz (Fermilab)

16:20 Plans for space-charge compensation with electron lenses at GSI - Markus Kirk (GSI)
16:35 P: Flash Talks
Flash Talks
16:35 - 17:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

16:35 Influence of Space Charge Effects on Landau Damping in High-Intensity Hadron Synchrotrons - Jingtong Du (IHEP/CSNS)

16:38 Space Charge Modelling with OPALX - Alexander Liemen

16:41 Beam-Beam Simulation Models and Numerical Noises for Flat Beam Collisions in the Electron-Ion Collider - Yun Luo (Brookhaven National Laboratory)

16:44 A Prototype FFA Magnet for High-Power Pulsed Proton Drivers - Jean-Baptiste Lagrange (Science and Technology Facilities Council)

16:47 When Mismatch Is Inherent: Mismatch Partitioning Between H⁺ and H⁻ in Dual-Beam Transport with Strong Space Charge - Yinqi Ji (Institute of Modern Physics, Chinese Academy of Sciences)

16:50 Reducing intrabeam stripping loss with angular momentum distributions - Shivam Kakkar (University of Tennessee, Knoxville)

16:53 Differentiable Self-Consistent Space-Charge Mapping Using Differential Algebra and a Truncated Green's Function Solver - Chong Shik Park (Korea University)

16:56 Electromagnetic Space-Charge Fields in a Cylindrical RF Cavity with an Axial Aperture - Chong Shik Park (Korea University)

16:59 Fast frozen indirect space charge modelling - Robert Simpson (University of Oxford)

17:02 Landau Damping with Space Charge in the LHC - Max Topp-Mugglestone (University of Oxford)

17:05 A novel method for simulating space-charge in Fixed Field Accelerators (FFAs) - Carl Jolly

17:08 Analysis of adiabatic trapping and transport phenomena for an accelerator model with space-charge forces - Francesco Orso Pancaldi (University of Bologna, INFN - Bologna)

17:11 4D Beam Matching, Phase Smoothing, and Resonant Energy Exchange in a 1 A Deuteron LINAC - Okuno Hiroki (RIKEN)

17:14 Simulation, calculation and measurements of transverse coupled-bunch instabilities with space charge and chromaticity in CSNS - Li Rao (Institute of High Energy Physics, Chinese Academy of Sciences)

17:17 Landau damping from octupolar tune spread in scaling FFAs - David Kelliher (STFC)
17:30 P: Poster Session
Poster Session
17:30 - 19:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Thursday, 1 October 2026
08:30 B: High-Intensity Linacs
High-Intensity Linacs
08:30 - 10:15
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

08:30 Lead talk: High-Intensity Linacs - Okuno Hiroki (RIKEN)

08:50 Reduction of longitudinal rms emittance through nonlinear space-charge forces - Jibong Hyun (QST)

09:05 Space-Charge Stability and Beam-Loss Margins in the PIP-II Linac - Abhishek Pathak (Fermi National Accelerator Laboratory)

09:20 Parametric instabilities in actual high-intensity linear accelerators - Dong-O Jeon (Institute for Basic Science)

09:50 Discussion Session B-1 - Okuno Hiroki (RIKEN)
10:15 Morning Coffee Break
Morning Coffee Break
10:15 - 10:45
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
10:45 C: Instabilities and Space Charge
Instabilities and Space Charge
10:45 - 12:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

10:45 Lead talk: Instabilities and Space Charge - Adrian Oeftiger (University of Oxford)

11:05 Effects of space charge near transition energy of the CERN PS - Miltiadis Bozatzis (Goethe University Frankfurt (DE))

11:20 Space charge studies at a fourth-generation light source SOLEIL II - Vadim Gubaidulin (Synchrotron SOLEIL)

11:35 Space-charge effects during operation with Landau octupoles: coherent damping and single-particle stability - Vladimir Kornilov (GSI Helmholtzzentrum für Schwerionenforschung GmbH)

11:50 Mitigation of Proton Beam Instabilities under Strong Space Charge - David Posthuma de Boer

12:05 Discussion Session C-2 - Adrian Oeftiger (University of Oxford)
12:30 Lunch Break with Posters
Lunch Break with Posters
12:30 - 13:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
13:30 Keynote Presentation: A Historical View on Research in Space-Charge for Particle Accelerators - Ingo Hofmann
Keynote Presentation: A Historical View on Research in Space-Charge for Particle Accelerators
- Ingo Hofmann
13:30 - 14:00
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre This view is, of course, inevitably a personal one, and I apologise for being incomplete, subjective, and overly focused on selected highlights in the area of linear accelerators. In 1953, the MURA (Midwestern Universities Research Association) project was founded in the Chicago area. It is often seen as a pioneering effort in the field of synchrotrons and storage rings, including early space-charge calculations and collective effects. However, rivalries and political decisions were not favourable for MURA. A few years later considerable indirect impetus—in terms of funding —was given to science in general and accelerators in particular by the Sputnik shock of 1957, which gave Western countries, especially the US, the feeling that they were lagging behind. In these early days, space charge was mostly understood in terms of the “Laslett tune shift”. Obviously, higher intensity was required, triggering increasing interest in more advanced space-charge effects beyond “single-particle resonances”. In 1977, the emerging interest in using high-intensity linear accelerators for heavy ions to drive inertial fusion (HIF), with the lead laboratory in Berkeley, stimulated the first studies of “space-charge-driven instabilities”. HIF continued as a study project in Europe, starting in 1995 and ending in 1998. CERN (on the initiative of Carlo Rubbia), GSI, and a number of other laboratories and universities have been engaged in it. A major impetus was given to the whole field of space charge by the development of high-intensity linear proton accelerators. The Oak Ridge SNS project triggered efforts to control coherent resonances and instabilities of various orders, Landau damping, bunch anisotropy effects, halo, and beam loss. Together with subsequent similar projects in Europe and Asia a broader basis for the understanding and control of space charge was created. Looking through the book of abstracts of this 2026 Space Charge Workshop, it is impressive to see how many topics are still under discussion—both in the areas of linear and circular accelerators.
14:00 A: Injection, Painting, Beam Splitting and Equilibrium Distributions
Injection, Painting, Beam Splitting and Equilibrium Distributions
14:00 - 15:45
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

14:00 Lead talk: Injection, Painting, Beam Splitting and Equilibrium Distributions - Austin Hoover Nicholas Evans (Oak Ridge National Laboratory)

14:20 Dual-plane painting injection in the HIAF Booster Ring - Guodong Shen (Institute of Modern Physics, Chinese Academy of Sciences)

14:35 Avoiding Beam Instabilities and Resonances with Circular Mode Beams - Onur Gilanliogullari (Uppsala University)

14:50 Injection Studies for the ISIS Pre-Injector Upgrade - Billy Kyle (ISIS, STFC, UKRI)

15:05 Space-charge effects in multi-turn extraction - Massimo Giovannozzi (CERN)

15:20 Discussion Session A-3 - Austin Hoover Shinji Machida
15:45 Afternoon Coffee Break
Afternoon Coffee Break
15:45 - 16:15
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
16:15 A: Space-Charge Measurement and Compensation Studies, Part 2 of 2
Space-Charge Measurement and Compensation Studies, Part 2 of 2
16:15 - 17:10
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

16:15 Circumventing Space Charge: Toward Transport-Free Tomography of High-Dimensional Phase Space in High-Intensity Linacs - Yu Du (Institute of Modern Physics, Chinese academic of Sciences)

16:30 Emittance growth under space charge neutralization condition in LEBT - Ippei Yamada (J-PARC Center, Japan Atomic Energy Agency)

16:45 Discussion Session A-2 - Giulio Stancari (Fermilab / UChicago)
17:10 P: Poster Session
Poster Session
17:10 - 18:00
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
18:30 General: Banquet at Trinity College
Banquet at Trinity College
18:30 - 21:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

18:30 Pre-dinner Drinks

19:15 Conference Photo

19:30 Banquet
Friday, 2 October 2026
08:30 B: Benchmarking and Experiments
Benchmarking and Experiments
08:30 - 10:15
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

08:30 Lead talk: Benchmarking and Experiments - Kiersten Ruisard (Oak Ridge National Laboratory)

08:50 Benchmarking PIC simulations against the SNS Beam Test Facility - Tony Wood (Oak Ridge National Laboratory)

09:05 Space-charge dynamics in bare IOTA: Benchmarking among simulations and experiment - Nilanjan Banerjee (Fermi National Accelerator Laboratory)

09:20 Benchmarking Experience with PTC-PyORBIT for High-Intensity Synchrotron Studies - Haroon Rafique (STFC)

09:35 Space Charge Effects in the Alternating Gradient Synchrotron at injection energies - Yichao Jing (Brookhaven National Lab)

09:50 Discussion Session B-2 - Kiersten Ruisard (Oak Ridge National Laboratory)
10:15 Morning Coffee Break
Morning Coffee Break
10:15 - 10:45
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
10:45 B: Space-Charge Modelling
Space-Charge Modelling
10:45 - 12:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

10:45 Lead talk: Space-Charge Modelling - Ji Qiang

11:05 Performance-Portable Space-Charge Methods in OPALX for Hadron and Lepton Accelerator Modelling - Michail Zampetakis (Paul Scherrer Institute (PSI))

11:20 Fast-Tracking Space Charge tool for Nonlinear Dynamics study in Realistic Collider Lattices - Helena Alamprese (Michigan State University - FRIB)

11:35 Longitudinal Phase-Space Reconstruction Using Differentiable Space-Charge Solvers - Sergei Sherstiuk (Technical University of Darmstadt)

11:50 Space Charge Physics in the Code ImpactX - Chad Mitchell

12:05 Discussion Session B-3 - Ji Qiang
12:30 Lunch Break with Posters
Lunch Break with Posters
12:30 - 13:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
13:30 A: Beam Loss and Halo Dynamics
Beam Loss and Halo Dynamics
13:30 - 15:00
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

13:30 Lead talk: Beam Loss and Halo Dynamics - YOICHI SATO (KEK/J-PARC)

13:50 Observations of mismatch-driven halo in 2.5 MeV H- beam at the SNS Beam Test Facility - Trent Thompson (University of Tennessee, Knoxville)

14:05 Space Charge Effect Simulation and Tune Optimization for Reducing Beam Loss at CSNS - Shouyan Xu

14:20 Experimental and Simulation Studies of Non-linear Resonances in the ISIS Synchrotron - ESMAEIL AHMADI (STFC)

14:35 Discussion Session A-4 - YOICHI SATO (KEK/J-PARC)
15:00 Afternoon Coffee Break
Afternoon Coffee Break
15:00 - 15:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
15:30 C: New Concepts
New Concepts
15:30 - 17:00
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Contributions

15:30 Lead talk: New Concepts - Elias Metral (CERN)

15:50 Space-Charge Impedance in Material-Filled Beam Regions for Ionization Cooling in a Future Muon Collider - Erik Kvikne (University of Oslo (NO))

16:05 Space Charge effects in the muon cooling section with RF-track - Bernd Michael Stechauner (Vienna University of Technology (AT))

16:20 Simulation Studies of Space Charge Effects in the 6D Rectilinear Muon Cooling Channel - Ruihu Zhu (IMP)

16:35 Discussion Session C-3 - Elias Metral (CERN)
17:00 General: Workshop Conclusion
Workshop Conclusion
17:00 - 17:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre
Saturday, 3 October 2026
08:40 ISIS Visit - Shinji Machida
ISIS Visit
- Shinji Machida
08:40 - 13:30
Room: Denys Wilkinson Building, Dennis Sciama Lecture Theatre 08:40: Passport check for RAL entry. Meet in front of Oxford University Physics Department, Denys Wilkinson Building (DWB), Keble Road Oxford OX1 3RH. 09:00: Departure by coach. 09:30: Arrive at RAL, R80 CR16 and CR17 meeting room and short introduction of the tour. 10:00: Tour starts with group of 10 for each places separately. 12:30 Return to Oxford by coach. 13:30 Arrival at DWB in Oxford after having passed by Didcot Parkway Station and Oxford Station.