Name: International Workshop on Higher Order Modes in Superconducting Cavities (HOMSC2025)
Start: 2025-10-06T08:00:00+02:00
End: 2025-10-08T18:00:00+02:00
Location: DESY, Hamburg

Monday 6 October 2025

09:00 Registration and welcome coffee
Registration and welcome coffee
09:00 - 09:30
Room: FLASH Seminar Room (bld. 28c)
09:30 Welcome - Nicoleta Baboi (MDI (Diagnose & Instrumentierung))
Welcome
- Nicoleta Baboi (MDI (Diagnose & Instrumentierung))
09:30 - 09:45
Room: FLASH seminar room (day 1 & 2) and CFEL seminar room (day 3)
09:45
09:45 - 10:45
Room: FLASH Seminar Room (bld. 28c)
Contributions

09:45 DESY SRF R&D towards a possible High Duty Cycle upgrade of the European XFEL - Hans Weise (DESY MSL (Supraleitende Beschleuniger Technologie))

10:15 New projects in China - Pei Zhang (Institute of High Energy Physics)
10:45 Workshop photo
Workshop photo
10:45 - 11:00
Room: FLASH seminar room (day 1 & 2) and CFEL seminar room (day 3)

11:00 Coffee break
Coffee break
11:00 - 11:30
11:30
11:30 - 13:00
Room: FLASH Seminar Room (bld. 28c)
Contributions

11:30 High-Order Mode Damping Strategies for FCC-ee Superconducting Cavities - Shahnam Gorgi Zadeh (CERN)

12:00 Higher Order Mode Damping Requirements for New Circular Accelerators - Na Wang (Institute of High Energy Physics)

12:30 Dipole mode wakefields and beam dynamics tracking simulations for the UK XFEL main accelerating Linacs - Anthony Gilfellon (UKRI / STFC / ASTeC)
13:00 Lunch break
Lunch break
13:00 - 14:00
14:00
14:00 - 16:00
Room: FLASH Seminar Room (bld. 28c)
Contributions

14:00 Concatenation Methods - Thomas Flisgen (Brandenburgische Technische Universität Cottbus-Senftenberg / Ferdinand-Braun-Institut gGmbH)

14:30 Higher-Order Mode Power Calculation of SHINE LINAC - JieXi Zhang (ShanghaiTech University)

15:00 Surface Impedance of Multilayered Superconducting Cavities - Aaron Gobeyn (TU Darmstadt)

15:30 Numerical Analysis of High-Order Modes in SRF Resonators for Particle Accelerators - Andrei Lunin (FNAL)
16:00 Coffee break
Coffee break
16:00 - 16:30
16:30
16:30 - 17:00
Room: FLASH Seminar Room (bld. 28c)
Contributions

16:30 Higher Order Mode Damping Assessment for Conduction-Cooled 915 MHz SRF Cavities in High-Power Industrial Electron Beam Accelerators - Alex Castilla Loeza (Jefferson Lab)
17:00
17:00 - 18:00
Room: FLASH Seminar Room (bld. 28c)
Contributions

17:00 Beam Stability in the EIC ESR: Contribution of the 591 MHz RF Cavities - Alexei Blednykh (BNL/EIC)

17:30 Discussion
Tuesday 7 October 2025
08:55
08:55 - 10:00
Room: FLASH Seminar Room (bld. 28c)
Contributions

09:00 Numerical analysis of higher-order mode couplers - Sosoho-Abasi Udongwo (Brandenburgische Technische Universität Cottbus-Senftenberg)

09:30 Status of the ECHO Code - Igor Zagorodnov (MPY (Beschleunigerphysik))
10:00
10:00 - 11:00
Room: FLASH Seminar Room (bld. 28c)
Contributions

10:00 RF absorber development at IJCLab - Akira Miyazaki (CNRS/IN2P3/IJCLab Université Paris-Saclay)

10:30 Design of HOM damped SRF Cavities for CW Operation in Storage Rings - Andranik Tsakanian (Helmholtz-Zentrum Berlin)
11:00 Coffee break
Coffee break
11:00 - 11:30
11:30
11:30 - 13:00
Room: FLASH Seminar Room (bld. 28c)
Contributions

11:30 HOM damping for the EIC ESR SRF Cryomodule - Jiquan Guo (JLAB)

12:00 Compact Coaxial HOM Damper for SRF Cavities - Andrei Lunin (Fermilab)

12:30 Progress of HOM couplers for PERLE SRF cavities - Patricia Duchesne (CNRS/IN2P3/IJCLab Université Paris Saclay)
13:00 Lunch break
Lunch break
13:00 - 14:00
14:00
14:00 - 15:30
Room: FLASH Seminar Room (bld. 28c)
Contributions

14:00 HOM Damping in 166MHz beta=1 QWR for High Energy Photon Source - Hongjuan ZHENG (IHEP)

14:30 Evanescent mode coupling in coaxial HOM filters - Kai Papke (MIN (Hochfrequenz))

15:00 HOM Damping for EIC Crab Cavities - Binping Xiao (Brookhaven National Lab)
15:30

15:30 - 16:00
Room: FLASH Seminar Room (bld. 28c)

16:00 Coffee break
Coffee break
16:00 - 16:30
16:30
16:30 - 17:30
Room: FLASH Seminar Room (bld. 28c)
Contributions

16:30 Radio frequency design ad higher mode analysis of superconducting Quasi-Waveguide Multi-cell Resonator crab cavities for the production of picosecond X-ray pulses for Elttra 2.0 - Nuaman Shafqat (Elettra Sincrotrone)

17:00 Discussion: Suppression/extraction of dangerous HOMs in superconducting crab cavities
19:00 Workshop Dinner
Workshop Dinner
19:00 - 22:00
Wednesday 8 October 2025
09:00
09:00 - 11:00
Room: Seminar Room IV (first floor)
Contributions

09:00 Developing a Beam Spectrum for Transient Beams in the CERN Double Quarter Wave Crab Cavities - Conor Euan Charles McFarlane (Lancaster University)

09:30 Cold Testing and HOM Coupler Qualification for HL-LHC Crab Cavities - Amelia Veronica Edwards (CERN)

10:00 Observation and simulation on the fill-pattern dependence of HOM power in the SuperKEKB superconducting cavity - Takaaki Yamaguchi (High Energy Accelerator Research Organization)

10:30 The UK XFEL project: conceptual design - Anthony Gilfellon (UKRI / STFC / ASTeC)
11:00 Coffee break
Coffee break
11:00 - 11:30
11:30
11:30 - 12:00
Room: Seminar Room IV (first floor)
Contributions

11:30 CW operation characteristics of the spare Eu-XFEL third harmonic cryomodule - Karol Kasprzak (MSL (Supraleitende Beschleuniger Technologie))
12:00

12:00 - 13:00
Room: CFEL

13:00 Lunch buffet
Lunch buffet
13:00 - 14:00
Room: CFEL

14:00

14:00 - 18:00