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I.FAST Workshop 2025 on Stability of Storage Ring Based Light Sources

Mar 17 – 21, 2025
KIT North Campus
Europe/Berlin timezone

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Contribution List

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2. Welcome greetings
Akira Mochihashi (Instuture for Beam Physics and Technology)
3/18/25, 9:15 AM
3. General information
Akira Mochihashi (Instuture for Beam Physics and Technology)
3/18/25, 9:20 AM
5. SLS 2.0 BPM and Beam Feedback Systems - First Beam Commissioning Experience
Dr Boris Keil (Paul Scherrer Institute)
3/18/25, 9:25 AM
52. Status of the design and simulations for the FOFB of PETRA IV
Sven Pfeiffer (DESY)
3/18/25, 9:50 AM
6. The orbit stability issue in the initial commissioning stage of High Energy Photon Source
Dr Xiyang Huang (Institute of High Energy Physics)
3/18/25, 10:35 AM
67. Orbit Stability at BESSY II: Progress of FOFB Upgrade and Current Stability
Günther Rehm (Helmholtz-Zentrum Berlin)
3/18/25, 11:00 AM
73. Application of deep learning method for insertion device orbit and coupling feedforward at the SSRF
xinzhong liu
3/18/25, 11:25 AM

The Shanghai Synchrotron Radiation Facility (SSRF), a third-generation synchrotron radiation source, demands exceptional beam stability for high-precision user experiments. However, manufacturing and installation inaccuracies in insertion devices (IDs) can lead to beam orbit and coupling distortions. To address this, we developed a data-driven predictive model leveraging deep learning to...
9. Source position stability: short discussion 1
3/18/25, 11:50 AM
7. Orbit stability and reproducibility at SOLARIS storage ring
Dr Adriana Wawrzyniak (SOLARIS)
3/18/25, 1:55 PM
72. Design and commissioning of the asymmetric beam optics in the SSRF storage ring
Shunqiang TIAN (SARI, CAS)
3/18/25, 2:20 PM

Lattice upgrade, consisting of replacing the conventional bending magnets with super-bend locally, constructing two double-mini-𝛽y optics (DMB) and installing a superconducting wiggler (SCW), was implemented in the Beamline-Project of Shanghai Synchrotron Radiation Facility (SSRF). The symmetry of the SSRF storage ring was completely destroyed, forcing the global optics to be modified. The...
66. BESSY III orbit correction scheme layout and performance
Sebastien Joly (HZB)
3/18/25, 2:45 PM

Currently in its Conceptual Design Phase (CDR), the 4th generation light source BESSY III aims to become a world-leading soft X-ray source, enabling numerous applications in metrology, life sciences, energy and catalysis materials, and many more. Its performance relies on ultra-low transverse emittances, achieved through the use of strong focusing magnetic elements that are sensitive to...
53. A transparent injection scheme for Diamond-II
Ian Martin (Diamond Light Source)
3/18/25, 3:10 PM
4. Experimental Application of Neural Network Fast Feedback Modeling at the Canadian Light Source
Dr Shervin Saadat (Canadian Light Source)
3/18/25, 3:35 PM

(Online talk)
54. (Tentative) XBPM system development and applications
Massimo Camarda (STLab)
3/18/25, 4:00 PM
56. Source position stability: short discussion 2
3/18/25, 4:25 PM
63. Qualification of Series Magnets in the SLS Upgrade at the Paul Scherrer Institute: Challenges, Results, and Lessons Learned
Stéphane Sanfilippo (Paul Scherrer Institute)
3/18/25, 5:10 PM

To enhance the performance of the Swiss Light Source (SLS) at the Paul Scherrer Institute (PSI), a comprehensive upgrade known as SLS 2.0 is currently underway (2021–2026). This ambitious project involves the renewal of the storage ring, achieving 40 times lower emittance in user operation mode, thereby significantly increasing the source brightness, and enabling groundbreaking research...
11. Elettra 2.0 magnets and girders
Dr Davide Castronovo (Elettra Sincrotrone Trieste)
3/18/25, 5:35 PM
15. Magnets and power supplies: short discussion 1
3/18/25, 6:00 PM
81. HEPS Fast Orbit Feedback System
Dr Shujun Wei (Instutute of High Energy Physics, CAS)
3/19/25, 9:05 AM
16. Radiation damage in permanent magnet materials
Dr Ben Shepherd (Science and Technology Facilities Council (STFC))
3/19/25, 9:30 AM

Online talk
18. Development of permanent magnet dipoles for ESRF-EBS
Dr Chamseddine Benabderrahmane (ESRF)
3/19/25, 9:55 AM
20. Magnets and power supplies: short discussion 2
3/19/25, 10:20 AM
62. Orientation talk for joint experiment: Quadrupole offset measurement by BBA
Christian Goffing (CERN and KIT)
3/19/25, 11:00 AM
65. Discussion: joint experiment
3/19/25, 11:30 AM
21. Vibration analysis and stability control for High Energy Photon Source in China
Dr Fang Yan (Institute of High Energy Physics)
3/19/25, 1:00 PM
22. Beam-based girder alignment in PETRA-IV: conceptual simulations
Dr Sajjad Hussain Mirza (DESY)
3/19/25, 1:25 PM

(Online talk)
23. Effects of the ALBA slab movement on ALBA-II
Dr Oscar Roberto Blanco García (ALBA)
3/19/25, 1:50 PM
24. Topology-Optimized Girder Design for PETRA IV: Achieving High Eigenfrequencies for Enhanced Stability
Normann Koldrack (DESY)
3/19/25, 2:15 PM
26. Infrastructure: short discussion
3/19/25, 2:40 PM
79. Statistical and interferometric beam diagnostics in IOTA at Fermilab
Giulio Stancari (Fermilab / UChicago)
3/19/25, 3:20 PM

At the Fermilab Integrable Optics Test Accelerator (IOTA), we are
carrying out a research program on the statistical and quantum-optical
properties of undulator radiation from electron bunches down to single
electrons [1]. As a result of this program, novel beam diagnostic
techniques have been developed. From the intensity fluctuations of
undulator radiation, it is possible to infer very...
29. Beam position measurements: from pickups to stable beams
Dima El Khechen (LAS)
3/19/25, 3:45 PM
76. Bunch-by-bunch feedback system used as a diagnostic device for multi-bunch instabilities in the DAΦNE collider
Danilo Quartullo (INFN-LNF)
3/19/25, 4:10 PM

DAΦNE is an electron-positron collider operating at INFN-LNF. Bunch-by-bunch feedback systems installed in each of the two rings allow to store high-intensity and stable beams, by counteracting strong coupled-bunch instabilities due to e-cloud and RF higher-order modes. These feedback systems can be also used as a diagnostic tool which is able to measure beam parameters which are important for...
31. Observing sudden beam loss events using bunch-by-bunch BPMs at SuperKEKB
Dr Riku Nomaru (The University of Tokyo)
3/19/25, 4:35 PM
32. Microbunching control and CSR stabilization at KIT-KARA
Luca Scomparin
3/19/25, 5:00 PM
69. Development of Control Systems for the Stabilization of Synchrotron X-Ray beams
Niccolò La Rosa
3/19/25, 5:25 PM

This work investigates the study, design, and implementation of a control system for stabilizing focused X-ray beams in synchrotron beamlines. Due to the challenges and high costs associated with direct and continuous access to these facilities, a custom Lab-replica was instead employed.
This replica utilizes an analog oscilloscope to represent the X-ray beam, two electromagnets to...
68. Discussion: Stability issues in general
3/19/25, 5:50 PM
60. Joint experiment: discussion 1
3/20/25, 5:30 PM
59. Joint experiment: discussion 2
3/21/25, 11:30 AM
89. Beam position measurements: from pickups to stable beams at cSTART
Dima El Khechen (LAS)

The KIT project, cSTART (Compact storage ring for accelerator research and technology), aims to demonstrate the injection and storage of sub-ps bunches and the use of LPAs (Laser plasma accelerator) as injector.
The long damping time of the low energy beam (50 to 90 MeV) compared to the storage time grants opportunities to study non-equilibrium beam dynamics. Ultrashort non-equilibrium beams...
82. Beam-based girder alignment in PETRA-IV: conceptual simulations
Sajjad Hussain Mirza (MSK, DESY)

DESY is advancing plans to upgrade PETRA III into a 4th generation light source. Magnetic lattice components are assembled and pre-aligned on extended girders before being installed in the tunnel. However, the considerable length of these girders and the inherent misalignment of the magnets introduce challenges for the PETRA IV lattice, particularly in storing the beam within the ring....
85. Development of permanent magnet dipoles for ESRF-EBS
Chamseddine Benabderrahmane (ESRF)

The ESRF-EBS (Extremely Brilliant Source) is an upgrade done at ESRF (European Synchrotron Radiation Facility) in the period 2015-2022. It aims to decrease the horizontal emittance and to improve the brilliance and coherence of the X-ray beams to best serve the new science opportunities. Permanent magnet longitudinal dipoles (DLs) have been developed for the ESRF-EBS upgrade. The use of...
84. Effects of the ALBA slab movement on ALBA-II
Oscar Roberto Blanco Garcia (ALBA CELLS)

The spanish 3rd generation synchrotron light source ALBA of 268.8 m and 3 GeV, is planning to renovate the Storage Ring to a 4th generation synchrotron, called ALBA-II, to be installed in the same location. The current ALBA storage ring has been used to validate the ALBA model behavior subject to ground motion and the ALBA-II ground movement studies have been based on 6-months and 1-year...
86. Observing sudden beam loss events using bunch-by-bunch BPMs at SuperKEKB
Riku Nomaru (The University of Tokyo)

SuperKEKB is an electron-positron collider aiming for high luminosity. However, its stable operation is challenged by Sudden Beam Loss (SBL), where beam instability occurs within tens of microseconds, leading to significant beam loss and triggering a beam abort. To better understand and mitigate SBL, we developed a new Bunch Oscillation Recorder (BOR) using AMD/Xilinx RFSoC. The BOR records...
83. Orbit stability and reproducibility at SOLARIS storage ring
Adriana Wawrzyniak (SOLARIS NSRC, Jagiellonian University)

Ensuring the stability of the electron beam at the SOLARIS synchrotron has been a key objective throughout its development. Several structural measures, including the installation of a vibro-elastomer mat and concrete block magnet girders, have effectively maintained the stability of the experimental hall within acceptable limits below 1.6um rms for low frequency range(below 10Hz) and below...
90. Status of the design and simulations for the FOFB of PETRA IV
Sven Pfeiffer (DESY)

PETRA III is one of the most important facilities at DESY. The PETRA IV project aims to replace PETRA III with an ultra-low emittance ring (20 pm), add a new experimental hall in two additional octants and replace DESY II with a new low emittance booster. In this way, the emittance will be reduced from 1300 pm to 20 pm. A brief overview of the activities on the way to a stable beam orbit will...
87. Vibration analysis and stability control for High Energy Photon Source in China
Fang Yan

The High Energy Photon Source (HEPS) is the first high-energy diffraction-limited storage ring (DLSR) light source built in China with designed natural emittance of 35 picometer radian. Beam stability is a critical issue for such an ultralow-emittance facility. To study ground vibration effects more closely aligned with reality, a novel beam dynamics analytical model is developed. In this...
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