Accelerator Reliability Workshop 2026 (ARW2026)

Session

Poster session

17 Nov 2026, 13:30

Hotel Aomori

34. A product life cycle for reliable electronics products in accelerator systems

Peter Haynes (CERN)

Poster

For many years industry, notably the automative sector, has optomised the production and reliability of its products through Quality Assurance processes. These processes have spread between industries and companies often being tailored to the product, regulatory need or culture of the company. Influenced by these processes in the Accelerator Technology Sector at the European Center for Nuclear...

19. A Reliability Retrospective of RHIC

Gregory Marr (Brookhaven National Laboratory)

Diligent Incident and Fault Tracking and Effective Use of Data

Poster

Following nearly 3 decades of commissioning and running, the operation of Brookhaven National Laboratory's Relativistic Heavy Ion Collider has drawn to a close. As the Removal & Repurposing of the facility begins, the Electron Ion Collider project builds upon our collective experience, and we must reexamine our metrics and reporting of faults and system failures in terms of reliability. This...

25. Accelerator Consolidation as a Reliability Strategy: Establishing a Complex-Wide Programme for Long-Term Operational Sustainability at CERN

Rende Steerenberg (CERN - Switzerland)

Beyond Firefighting: Implemented Lessons Learned for Improved Reliability

Poster

Ensuring high accelerator availability over multiple decades requires more than corrective maintenance and periodic upgrades. As accelerator infrastructures age, reliability is increasingly challenged by equipment obsolescence, diminishing industrial support, radiation-induced degradation, loss of expertise, and growing interdependencies between technical systems.

To address these...

90. Accelerator Fault Handling at SLS 2.0

Felix Armborst (Paul Scherrer Institut (PSI))

Poster

With the transition from machine commissioning to beamline commissioning and user operation, the reliability and availability of the SLS 2.0 accelerator complex have become increasingly critical. Rapid and systematic fault handling is essential to minimize downtime and protect the accelerator. This contribution presents the key fault-handling systems developed for SLS 2.0: the Injection Guard...

139. Accelerator Reliability of HIMAC particle therapy facility

Eiichi Takada (QST Chiba)

Poster

HIMAC has been providing Carbon and other beams for cancer therapy since more than 30 years.  Presnt status and challenge on accelerator reliability issues are discussed.

28. Activity selection system for controlled application of predefined Machine Protection configurations

Daniele Cosco

Poster

Machine protection systems in accelerator facilities often require temporary masking or modification of interlocks during dedicated study and commissioning activities. Traditionally, such configurations are applied manually, which introduces risks related to human error, inconsistent settings, and reduced reliability.

To address these challenges, an activity-based selection system has been...

67. ALBA RF Reliability upgrades

Mr Oriol Serres (ALBA synchrotron)

Poster

Over the years, the ALBA Synchrotron RF system has undergone significant upgrades to maximize beam availability and minimize downtime. Key reliability improvements include the transition from Thales to L3 IOTs, the integration of Co-stubs for rapid mode switching, the deployment of an active RF Trip Compensation system, the installation of a solid-state power amplifier (SSPA) in the booster,...

136. Application of Simulation Techniques in PLC-Based Control Systems for Enhanced Reliability at ISIS

Aamir Khokhar (ISIS Neutron and Muon Source)

Poster

This poster presents practical simulation techniques developed and applied within PLC-based control systems at ISIS to improve system reliability and reduce commissioning risk. The work covers methods used to test and validate control software when physical hardware was unavailable, identification and modelling of vacuum system behaviour within the PLC to enable early leak detection, and...

128. Automated Fill and Drain for the TS1 Target Cooling Water circuits at ISIS

Hamza Maqbool (STFC - ISIS Neutron and Muon Source)

Poster

The Target Station 1 (TS1) water cooling system at the ISIS Neutron and Muon Source manages four activated water circuits: Target (D2O), Reflector, Water Moderator, and Secondary demineralised water. There are sixteen operational scenarios across these circuits for draining, refilling, gas blowdown, and venting. Historically, executing these required complex manual sequencing of dozens of...

107. Availability strategies for the JAEA-ADS Linac

Bruce Yee-Rendon (JPARC/JAEA)

Poster

The operation of an accelerator-driven subcritical system (ADS) requires strict control over the frequency and duration of beam interruptions to prevent thermal stresses on the reactor structures. A significant challenge is minimizing the number of beam interruptions that last longer than a few seconds, as this is a common issue in current linear accelerators. To address this challenge, the...

118. Behind the screens – Ensuring reliability, safety, and uptime over the past decade

Christoph Heuer (AUT), David Ritter (MedAustron)

Poster

The MedAustron Ion Therapy Centre saw the first patient treatment in December 2016. Starting as a single-room, proton-only machine employing only one horizontal beam line, the therapy accelerator has gradually evolved to a three-room p+ and C6+ facility encompassing two horizontal beam lines, one vertical beam line, and a Gantry, allowing us to routinely treat more than 50 patients per...

83. Beyond the Knee: Extending Klystron Lifetime Through Cathode Characterization at LANSCE

Britt Braghini (Los Alamos National Lab), Mr Jose Castellano (LANL)

Poster

Recent operational experience with the LANSCE 805 MHz high-power RF (HPRF)
system has shown an accelerated rate of failure among the klystrons supporting the Coupled
Cavity Linac (CCL). Klystron mortality rates, expected service lifetimes, and general failure
modes were previously reported in 2024. These observations motivated additional efforts to
better understand the factors...

114. Building reliable operation for the new TRIUMF Injection Beamline

Mr Eric Chapman (TRIUMF)

Poster

In operation since 1974, TRIUMF is home to the largest cyclotron in the world. As part of the initiative to bring the new Advanced Rare IsotopE Laboratory (ARIEL) online, the 520MeV complex has undergone numerous upgrades. One essential to ARIEL was replacing the main injection beamline to increase reliability and total proton output of the main machine, suitable for the upcoming ARIEL era....

42. CERN Facility Overview: Availability Tracking and Reliability Trends

Lukas Felsberger (CERN)

Poster

Maintaining high beam availability across CERN’s accelerator complex is underpinned by continuous fault tracking and the systematic collection of long-term operational data. Multi-year fault data captures machine and sub-system availability, trends, and root causes — such as a cooling plant issue impacting power converters — across the entire facility. This provides a robust empirical baseline...

80. Challenges of SLS 2.0 Commissioning During Ongoing Operations at PSI

Felix Armborst (Paul Scherrer Institut (PSI)), Martin Brinkmann (PSI)

Poster

The integration of the new Swiss Light Source (SLS) after the upgrade project SLS 2.0* into the ongoing operation of the Paul Scherrer Institute posed a major challenge, as commissioning had to be carried out without additional personnel alongside the 24/7 operation of three other accelerators.
The increased complexity of operations placed high demands on control room personnel. Early...

35. Clear and concise visual state indication in accelerator systems

Peter Haynes (CERN)

Poster

Visible LEDs on products are commonly believed to offer a rapid way to spot a issue. However, in the medical device sector they have been found to cause confusion, miss-diagnosis and panic in patients. As a result, in the past few years through a range of standards the information conveyed by LEDs on medical products has become regulated resulting in harmonization across equipment and...

140. Commissioning and Operational Status of the HIAF Superconducting Heavy-Ion Linac

Chi Feng (IMPCAS)

Poster

The superconducting heavy-ion linac (iLinac) of the High Intensity heavy-ion Accelerator Facility (HIAF) in Huizhou, China entered trial operation in 2026. It comprises a room-temperature front end, 81.25 MHz QWR and 162.5 MHz HWR sections, and has accelerated ions covering a wide range of charge-to-mass ratio, from 209Bi31+ (Q/A = 0.148, 17.07 MeV/u, 90 eμA) to 18O6+ (Q/A = 0.333, 32.00...

57. Consequences of incoming electrical power sags during ESS commissioning and installation

Marc Munoz (European Spallation Source)

Poster

On the night of the 25th November 2025,ESS experimented a voltage sag from the incoming 12.5 kV power. As a consequence, an oil compressorof the accelerator Cryopant and the main water pump of the Target Moderator cooling system failed.
The consequences of those two failures were:
· Oil compressor: Stop of the compressor, stopping the Accelerator Cryoplant. When restarting the system, 3...

117. Continuous Improvement in SESAME Machine Reliability

ABDEL RAHMAN ABUHUSSEIN (SESAME)

Poster

Over the past two years, the SESAME machine underwent a comprehensive series of hardware and software upgrades aimed to improve machine availability and minimize unplanned downtime. This poster presents a summary of key improvements and upgrades implemented across various accelerator subsystems.

These upgrades include the migration of critical subsystems to modern hardware infrastructure,...

97. Continuous Performance Improvement at the ISIS Neutron and Muon Source

Bryan Jones (ISIS Neutron and Muon Source)

Poster

The ISIS Facility at the Rutherford Appleton Laboratory produces intense neutron and muon beams for condensed matter research. Since 1984 its 50 Hz, rapid cycling synchrotron has accelerated protons from 70 to 800 MeV and typically delivers 0.2 MW of beam to two target stations supplying thirty-seven instruments.
Successful long-term operation of the facility requires continual improvement to...

132. Cooling of the Injection Kicker Magnets in the NanoTerasu Storage Ring

Taiki Iwashita (National Institutes for Quantum Science and Technology)

Poster

NanoTerasu, a new 3 GeV synchrotron light source constructed in Sendai, Japan, started user operation in April 2024 and steadily increased its stored beam current. With increasing stored beam current, the ceramic chamber in the storage-ring injection kicker section was found to be heated by Joule heating due to image currents. The chamber temperature was predicted to reach approximately 90°C...

130. Correction-Coefficients Reconfiguration for Correction Magnet Power Converters at SuperKEKB Main Ring

Shu NAKAMURA (KEK)

Poster

Small power converters operate roughly 800 steering magnets and approximately 900 auxial quadrupole magnets in SuperKEKB main ring. These power converters provide a bipolar output of 5 A or 10 A, and most were manufactured during KEKB construction. They did not undergo overhauls during the upgrade from KEKB to SuperKEKB, meaning a significant amount of time has passed since their manufacture....

96. Design and Deployment of a Beam-Based Fault Alarm and Analysis Platform for the HIAF

JUQI LI (Institute of Modern Physics, Chinese Academy of Sciences)

Poster

Beam faults at the HIAF (High Intensity Heavy-ion Accelerator Facility, Chian) iLinac rarely originate from a single subsystem; they emerge from coupled behaviours among the ion source, RFQ, superconducting cavities, LLRF, cryogenics, vacuum, magnets, and interlock systems. Conventional threshold alarms are subsystem-specific and often miss early precursors or produce false triggers. This oral...

48. Design and Reliability Challenges of the Beam Charge Monitoring Interlock System at the ALS

Denis Paulic (Lawrence Berkeley National Lab)

Poster

The Beam Charge Monitoring Interlock System (BCMIS) is a new safety system developed by the Personnel Protection Systems (PPS) team for the Advanced Light Source Upgrade (ALS-U) at Lawrence Berkeley National Laboratory. BCMIS mitigates ionizing radiation hazards by limiting the severity of beam loss events. It continuously monitors beam charge across the transfer lines and automatically...

88. Designing the ESS Hydrogen Safety Interlock System for Improved Reliability and Availability

Donya Daryadel (European Spallation Source (ESS))

Poster

The ESS Cryogenic Moderator System (CMS) uses liquid hydrogen moderators to achieve high cold neutron brightness. Due to the use of hydrogen at cryogenic temperature and elevated pressure, dedicated protection measures are required to mitigate the consequences of potential hydrogen leaks. One of these mitigation measures is the Hydrogen Safety Interlock System (H2 SIS).
The H2 SIS has been...

137. Developing the infrastructure for the Asset Management and Reliability Program Supporting the ASD Scorpius Accelerator

Rafael Nerell (Los Alamos National Laboratory)

Poster

The National Nuclear Security Administration’s capital project Advanced Sources
and Detectors is responsible for delivering a new radiography capability to support science-based
nuclear weapons mission. Scorpius is the nickname given to this capability that will be deployed
underground at the Principle Underground Laboratory for Subcritical Experimentation (PULSE) at
the Nevada...

45. Development of a Universally Applicable Tool for Robust Weibull Analysis of Field Systems – Applied to CERN's Front-End Computers

Ioan Kozsar (CERN)

Poster

Reliability analysis of field systems is essential for maintenance planning. However, lifetime data for field
systems are often incomplete, heavily censored, and affected by changes in data-recording practices. In
addition, failure mechanisms are frequently not documented, making it difficult to identify an appropriate
statistical model.

This work presents a Python-based Weibull Analysis...

70. Development of a voltage monitoring system for ion sources

Lyndon Anthony (iThemba LABS)

Poster

The lifetime of the Penning ion source at iThemba Laboratory for Accelerator Based Sciences (iThemba LABS) is strongly influenced by the discharge voltage and current, yet the mechanisms responsible for source degradation remain incompletely understood. While the discharge current is controlled during operation, the discharge voltage varies dynamically in response to the demand current and...

65. Effective use of traditional filtration devices in the water-cooling system of the Linear IFMIF Prototype Accelerator (LIPAc)

Kohki Kumagai (QST)

Poster

The IFMIF/EVEDA project is being carried out under the Broader Approach Agreement between the Government of Japan and EURATOM. As part of these activities, beam commissioning of the Linear IFMIF Prototype Accelerator (LIPAc) is underway in Rokkasho, Japan, with the objective of demonstrating the feasibility of continuous-wave (CW) acceleration of a high-intensity deuteron beam.
Since LIPAc...

135. Electronic Devices: Development, Versioning, and Documentation

Patricia Nallin (LNLS | CNPEM)

Poster

Electronic devices are a fundamental component of many accelerator subsystems. In some cases, commercial off-the-shelf (COTS) equipment does not fully comply with system requirements, making it necessary to develop and build custom electronics. Long-term maintainability, including preventive and corrective maintenance, system updates, and technical support, relies on effective hardware...

106. EPICS Alarms on Variable Trends

Janice Nelson (SLAC National Accelerator Facility)

Poster

SLAC’s EPICS control system alarms operate on high and low thresholds for each process variable. In situations where external factors require large tolerance windows, alarming on the trend of a variable or on the percentage of time outside of the tolerance window can be more helpful for discovering certain failure modes. We have created a system of mini data buffers in EPICS Compress records...

54. EPICS Integration of Infrared Cameras for Temperature Monitoring in High-Power RF Tests

Koki Hirosawa (QST)

Poster

High-power radiofrequency (RF) systems are critical components of RF accelerator facilities, where unexpected overheating can lead to component degradation, reduced availability, and costly downtime. In the Linear IFMIF Prototype Accelerator (LIPAc) RF system, local overheating of inner conductors in coaxial transmission lines and thermal deformation of RF loads have been observed despite the...

43. Evolution of a Power Supply

Stephen West (ISIS Neutron and Muon Source)

Poster

The ISIS accelerator is based on an 800MeV synchrotron arranged as a 'White Circuit'. The magnet current is a 50Hz AC waveform superimposed on top of a DC bias. There are two separate power supplies: one DC the other AC. The AC power supply has changed since the original early 1980's installation which was built from rotating machines through to a modified UPS system in the 2000's. It is...

93. Fault Reporting as a source of high-granularity statistics and decision-making

Reid Smith (Brookhaven National Lab, NSLS-II)

Poster

Machine statistics can provide more than just a reliability percentage. Through a combination of systems, habits, and close coordination between NSLS-II’s data collection (Operations group) and our maintenance planning (Coordination group), we have been able to use our fault data in interesting and effective ways.

Knowing and tracking the frequency and duration of faults by system and...

46. Fault Tracking and Reliability Analysis at CSNS: A Case Study of RFQ MTBF Data

yue yuan (institute of high energy physics, CAS)

Poster

Incident and fault tracking systems are a key foundation for operational assessment, reliability analysis, and maintenance optimization in accelerator facilities. During the long-term operation of the China Spallation Neutron Source (CSNS), a systematic machine-time fault recording mechanism was established to document downtimes, failures, and related recovery information, providing valuable...

112. Fault Tree Modeling and Reliability Analysis of the CAFE2 Accelerator

昕 马 (中国科学院近代物理研究所)

Poster

The Chinese Accelerator Facility for Superheavy Elements (CAFE2), developed by the Institute of Modern Physics, Chinese Academy of Sciences, is an upgrade of the Chinese Advanced Front-end Demonstration Linear Accelerator (CAFe). It provides advanced experimental capabilities for superheavy element research, including studies of their chemical properties and the production of neutron-rich...

98. Formal and informal methods in Learning from Incidents (LFI); A case study

Morteza Mansouri (European Spallation Source ERIC)

Poster

Learning from incidents (LFI) is an important aspect of reliability and safety management in particle accelerator facilities. While formal processes such as incident reporting, investigations, and corrective actions are well established, informal learning processes including peer discussions, operational experience sharing, and ad hoc coordination also play a significant role during abnormal...

22. From bugs to budget, how can we use data for an efficient control system

Faye Chicken (European Spallation Source)

Diligent Incident and Fault Tracking and Effective Use of Data

Poster

As the European Spallation Source gets closer to steady state operations (SSO), and the start of the scientific user program, the ways of working needs to change. In order to maintain a reliable accelerator for the neutron source, and achieve the 95% uptime of the facility, it is important to have accurate fault logging, be prepared for difficult issues and avoid prolonged fault-finding...

79. From Data to Decisions: Informed Hardware Replacement Planning for CERN's Front-End Computers

Eve Fortescue (CERN)

Poster

Deciding whether to replace an entire population of equipment of a given type, and when, is rarely a question that a single system can answer on its own. For CERN's Hardware Infrastructure Team (HIT), this decision depends on knowing what equipment exists, how it has performed historically, and where it sits in its lifecycle; information that has traditionally lived in separate, disconnected...

121. From Operational Needs to Software Tools: An Operator-Driven Approach at ALBA

David Yepez (ALBA Synchrotron)

Poster

Efficient accelerator operation increasingly relies on software tools for monitoring, diagnostics, data analysis and automation. At ALBA Synchrotron, software development is primarily coordinated by the Computing Division, which supports a wide range of facility-wide programming requirements. However, the operational environment also generates highly specific requirements that need rapid...

24. Fusion’s Missing Link: Why RAMI Is the Backbone of Commercial Viability

Dr Javier Serrano (Fusion for Energy, F4E)

Beyond Firefighting: Implemented Lessons Learned for Improved Reliability

Poster

Fusion energy is no longer a distant dream—it’s a global industrial race. With around 80 private companies and €13 billion in cumulative funding since 2020, the sector is now targeting near-term power plant deployment. Yet, as the sector races toward commercialization, a critical blind spot persists: the lack of mature Reliability, Availability, Maintainability, and Inspectability (RAMI)...

20. Implement ML-Based Optimizer Badger for LANSCE Control Room

En-Chuan Huang (Los Alamos National Laboratory)

Poster

The Los Alamos Neutron Science Center (LANSCE) supports five user facilities and operates under a wide range of beam conditions. For decades, beam tuning has relied largely on operator expertise and manual knob adjustments to control losses. While several optimizers have been developed and tested for specific tasks, none have been incorporated into routine operations, in part because...

44. Implementing Bayesian Optimization for Booster Capture Optimization at the Canadian Light Source

Thomas McKeith (Canadian Light Source)

Poster

The Canadian Light Source is a Third Generation Synchrotron Light Source in Saskatoon Canada which delivers Beam to 22 user beamlines. The injector consists of a LINAC and Booster Ring. There has been significant beam losses during injection into the booster ring which the operators would manually adjust steering magnets at the end of the LINAC to Booster (LTB) transfer line. A Bayesian...

111. Improvements in Temperature Monitoring in BNL's Main Control Room

Gregory Marr (Brookhaven National Laboratory)

Poster

In 2023, the Relativistic Heavy Ion Collider (RHIC) ran over the summer, experiencing numerous failures due to high temperatures. In response, a new temperature monitoring page was created, showing temperatures around the complex while also giving direct access to a desired temperature log by webpage. This tool has markedly simplified the early moments of investigation into temperature alarms...

13. Improving the reliability of critical software through Formal Methods at CERN

Borja Fernandez Adiego (CERN)

Integrated Reliability across accelerator sub-systems – Importance of robust interface definition

Poster

Ensuring high software reliability is essential for the safe and continuous operation of particle accelerator systems, where failures can have significant operational and safety impacts. Formal methods provide a rigorous approach to improving software reliability by enabling an unambiguous specification, systematic analysis, and exhaustive verification of critical software components, such as...

59. Integration and Commissioning of Beam Diagnostics Instruments with Machine Protection

Cyrille Thomas (European Spallation Source ERIC)

Poster

ESS accelerator has completed its second phase of Beam on Dump commissioning and reached a peak beam power of 17 MW, corresponding to 14% of the nominal 125 MW peak power. At this stage, machine protection is critical and reliable operation can only be achieved if the beam instrumentation systems implementing protection functions deliver the required performance, and if their integration and...

116. Investigation and Mitigation of RF Trips after RF Cavity Replacement for Reliable Operation at SAGA-LS

Dr Masahito Hosaka (SAGA Light Source)

Poster

At SAGA Light Source (SAGA-LS), frequent beam losses caused by RF reflection trips of the RF cavity had been a serious reliability issue for stable operation. To improve operational reliability, we replaced the RF cavity with a new one in 2025. However, after the replacement, beam losses due to the RF reflection trips of the cavity still occurred. To investigate the cause, we analyzed the RF...

134. Investigation of the 2022 Turbo-Circulator Failures in the ESS Target Helium Cooling System

Johannes Gustafsson (European Spallation Source)

Poster

In 2022 both helium circulators in the target primary cooling system had a critical failure during a test. The helium circulators, called Turbo-Circulators (TC), are state-of-the-art, that was designed for a flow rate of 3 kg/s of helium at 10 bar to remove 3 MW of heat power deposited to the ESS Tungsten Target.

Since December 2021, three testing periods have been conducted by the...

31. LANSCE 2026 – The Drift Tube Linac, Magic Mud and Bypass Surgery

Mark Gulley (Los Alamos National Laboratory)

Poster

The Los Alamos Neutron Science Center (LANSCE) User Facility has just celebrated 54 years of beam operations. LANSCE is a kilometer-long H+/H- linear accelerator serving five active and unique user facilities. The Drift Tube Linac section of LANSCE has embedded quadrupole electromagnets in most of the drift tubes. During the 2024 run cycle, a water leak developed on one of the drift tube water...

124. LANSCE FPGA Based Chopper Pattern Fault Chassis

Joseph Snyder (Los Alamos National Laboratory)

Poster

The H- species of beam at the LANSCE accelerator is chopped into
one of three patterns - Micro Pulse Enable Gate (MPEG), Long
Bunch Enable Gate (LBEG), and H-GX. Both variations have variable
chopping patterns with a minimum micropulse length of 20ns and a
nominal period of 360ns. Accurate comparison of the prescribed
chopping pattern Vs. the actual chopped beam has never been
possible...

101. Long-Term Availability Trends and Lessons Learned from GSI Accelerator Operation during the FAIR Construction Phase

Oksana Geithner

Poster

The GSI accelerator complex has continued user operation throughout the FAIR construction phase, while major technical changes and construction activities were taking place. We present operational and availability experience from 2012 to 2025, based on operational time records and fault reports from the GSI Operator Logbook (OLOG). Since 2020, our Availability Working Group has systematically...

125. Maintenance and Consolidations of rotating machinery of LHC cryogenics system at CERN

FREDERIC FERRAND (CERN)

Poster

CERN operates and maintains several large cryogenic systems with complex architecture necessary for the operation of the Large Hadron Collider (LHC) and its detectors ATLAS and CMS. Continuous operation of the accelerator & detectors throughout Run2 (2015-2018) has provided the cryogenics group with valuable information on the failure modes of rotating machinery in helium compressor stations....

133. Managing Design Improvements Across Interconnected Personnel Safety Systems at Different Lifecycle Stages

Julia Grönvall (European Spallation Source)

Poster

The European Spallation Source (ESS) is progressively developing and commissioning Personnel Safety Systems (PSSs) for new neutron instruments, a process that will continue through the transition from facility commissioning into steady-state operation. Consequently, instrument PSSs are at different lifecycle stages, with some commissioned and prepared for operation, some undergoing...

108. Mechanical Trouble Experience of Superconducting Rotating Gantry

Hikaru Souda (Yamagata University)

Poster

Carbon ion radiotherapy is an effective radiotherapy with a high linear energy transfer (LET) and a sharp dose distribution. Nevertheless, carbon ion medical accelerators are larger than medical proton accelerators and are difficult to construct and maintain. In particular, a rotating gantry is preferable for patient treatment, but this had not been realized for a long time due to its large...

76. Modernization of LIPAc Operator Interfaces and the EPICS Control System Ecosystem

Juan Carlos Morales Vega

Poster

LIPAc, the Linear IFMIF Prototype Accelerator, is being constructed at the QST Rokkasho Institute for Fusion Energy, Aomori, under the Broader Approach agreement between Europe and Japan. The project is currently moving towards Phase C, which includes the installation and validation of the SRF acceleration stage in the beamline, with the start of cryogenic cooldown approaching.

This...

104. Modernizing without disruption; Maintaining reliability during TRIUMF’s transition to a distributed control system

Sierra Dean (TRIUMF)

Poster

The TRIUMF accelerator complex is home to various integrated machines, including a 520 MeV cyclotron, a superconducting E-Linac, and an Isotope Separation Online (ISOL) facility.
The long-term reliability of the laboratory is in part due to the complex control system in-use since the 1970s with CAMAC (Computer Automated Measurement and Control) instrumentation and interface systems, running...

120. Observation of Discharge Marks on the SAGA-LS RF Cavity

晴信 竹田 (九州シンクロトロン光研究センター)

Poster

RF cavity at the SAGA Light source (SAGA-LS) had been in operation since 2004. In recent years, the SAGA-LS storage ring has experienced frequent sudden beam losses caused by trips of the RF system due to reflected RF power from the RF cavity. To address this issue, the RF cavity was replaced with a new one in November 2025.
During the replacement, the interiors of the previously installed...

122. Operation and Availability of Safety Systems at J-PARC

Takuro Kimura (J-PARC/KEK)

Poster

J-PARC consists of the first-stage linear accelerator (LINAC), the intermediate-stage Rapid-Cycling Synchrotron (RCS), and the Main Ring (MR) in the final stage. It also comprises three experimental facilities: the Materials and Life Sciences Experimental Facility (MLF), which receives beams from the RCS; and the Neutrino Experimental Facility (NU) and Hadron Experimental Facility (HD), which...

32. Operation Status and Upgrading of HIRFL

MeiTang Tang (Institute of modern physics Chinese academy of science)

Poster

This presentation will report on the recent operational performance of the HIRFL facility. Statistics including total operational hours, fault downtime and effective beam delivery time will be presented, together with an overview of major significant faults experienced over recent years. Recent upgrade activities and the corresponding beam‑performance improvements are described. Future upgrade...

78. Operational and Availability-Oriented PSS Integration Practices at ESS

Afshin Farshidfar (European Spallation Source ERIC)

Poster

Several Personnel Safety Systems (PSS) are being developed and commissioned as part of the ongoing construction and commissioning of the European Spallation Source (ESS), the world’s most powerful proton accelerator-based neutron source. The ESS PSS consists of safety interlock systems contributing to the mitigation of hazards to personnel such as prompt ionizing radiation, vacuum, and high...

103. Operational experience and availability improvement of the LIPAc cryogenic system

Takashi Ebisawa (QST)

Poster

Engineering validation activities for the IFMIF accelerator concept—conducted through the Linear IFMIF Prototype Accelerator (LIPAc)—are ongoing in Rokkasho, Aomori, under the Broader Approach (BA) framework. In the LIPAc system, installation of the Superconducting Radio Frequency (SRF) linac and integration with the cryogenic system are currently in progress.
During the cryogenic cooling...

113. Operational Experience and Reliability Improvements in the Sirius Cryogenic Plant

Mr Gustavo Rossignatti Gomes (LNLS - Laboratório Nacional de Luz Sincrotron)

Poster

The reliability of the helium cryogenic plant is critical to ensuring the operational availability of the Sirius particle accelerator, as it supplies liquid helium to the superconducting cavities. Commissioned in March 2024, the plant operates at 4.5 K and has a cooling capacity of 816 W. This paper presents an analysis of the main failure events observed during plant operation, as well as...

109. Operational Experience with Automated Anomaly Detection on the CERN PS RF Cavities

Joel Axel Wulff (CERN)

Poster

The CERN Proton Synchrotron (PS) is equipped with several radiofrequency (RF) systems with heterogeneous hardware of different age. Despite high availability, some systems require frequent resets. Automatic fault recording supports post-failure root-cause analysis. However, interlocks alone may miss subtle beam or equipment degradation.

Machine learning-based anomaly detection has therefore...

71. Operational Experience, Incident Tracking, and RAMI Analysis of the LIPAc Injector

Tomoya Akagi (QST)

Poster

The injector of the Linear IFMIF Prototype Accelerator (LIPAc) has accumulated extensive operational experience through a series of long-duration campaigns with high-current deuteron beams. As a key subsystem for future fusion neutron source facilities, reliable injector operation is essential for achieving high accelerator availability.
To capture operational experience and equipment...

8. Operational Insights and Technical Enhancements of a Medical Proton Therapy Accelerator

Markus Kostezer (PSI-Paul Scherrer Institut)

Production Facilities and Commercial Applications

Poster

The Paul Scherrer Institute PSI is the largest research institute for natural and engineering sciences within Switzerland. We perform cutting-edge research in the fields of future technologies, energy and climate, health innovation and fundamentals of nature. By performing fundamental and applied research, we work on sustainable solutions for major challenges facing society, science and...

38. Optimization of Automated Repair Strategies for the Future Circular Collider (FCCee)

Jack Heron (CERN)

Poster

The 91 km circumference of the Future Circular Collider (FCCee), combined with radiation constraints, makes human-centric repairs operationally limiting. Long intervention times risk becoming a major bottleneck to scientific output, motivating a shift toward optimized automated repair and maintainability as a first-order design constraint.

This work presents a Maintainability by Design...

72. PETRA III in 2026: From Beam Operation to Refurbishment Shutdown

Michaela Schaumann (Deutsches Elektronen Synchrotron DESY)

Poster

PETRA III continued as one of the world’s leading synchrotron light sources delivering photon beams to its 25 beamlines at high availability of 97.5 % in 2026. Downtime was primarily caused by external power glitches and aging pre-accelerator infrastructure. A highlight was the successful proof-of-principle test of injecting a laser plasma accelerator (LPA)-generated electron beam directly...

69. Physics-Based Strategies for Beam Availability at the CSNS High-Intensity Proton Accelerator

Hanyang Liu (IHEP)

Poster

The China Spallation Neutron Source (CSNS) operates an 80-MeV linac and a 1.6-GeV rapid cycling synchrotron (RCS), routinely delivering beam power well above its original design value. Sustaining high beam availability under such conditions requires not only hardware maintenance but also physics-informed operational strategies. This contribution presents how the CSNS accelerator physics group...

81. Power Feed Failure at Brookhaven National Laboratory

Pau Sampson (Brookhaven National Lab USA)

Poster

On August 25th 2025 a failure of the preferred 69 kV power line at Brookhaven National Laboratory (Upton New York, USA) occurred, disrupting all Operations for an extended period. This line supplies power to the north area of the laboratory which includes the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory), The fault necessitated a full system shutdown, disrupting all...

64. Power supply dimming

Andy Black (STFC)

Poster

On ISIS we use a large number of high current DC power supplies.
During longer breakdowns these supplies have generally been left running at full output until the issue had been resolved.
I have been developing a system to store the operational value of the supplies, remotely run down each DC power supply to a predetermined level and then run them back up to their previous operational level....

123. PROGRESS OF THE INVESTIGATION OF THE LAYER-SHORT IN THE J-PARC MR BENDING MAGNET

岩田 宗磨 (高エネルギー加速器研究機構)

Poster

A layer-short occurred in a bending magnet of the J-PARC Main Ring (MR) in May 2024. Its location and cause could not be identified from the external appearance of the magnet. Identifying the layer-short location by non-destructive methods before destructive investigation is important because information related to the cause may be lost during coil disassembly and cutting. The layer-short...

115. Project Documentation for the PARTIH Interim Solution as an Injector for FAIR

Alissa Krause (GSI)

Poster

After the major fire in the RF Gallery at GSI Helmholtz Centre for Heavy Ion Research, normal beam operations were no longer possible, and two interim solutions had to be found for the commissioning of FAIR (Facility for Antriproton and Ion Research). PARTIH is one of the planned interim solutions. To this end, the HITRAP (Heavy Ion Trap) decelerator will be reversed and installed as an...

82. Pros and Cons of Standardization in Electrical Design for Protection Systems

Marcin Zmuda (European Spallation Source)

Poster

Electrical design is one of the final stages of the detail design phase in the functional safety lifecycle. Standardization on both the component level and control system enclosure/rack assembly level leads to significant cost and time reductions in the design and implementation of subsystems. It also encourages a unified approach during the testing phase and also simplify asset management and...

7. Proscan B4C Degrader 70 MeV

Andreas Mülhaupt (PSI - Paul Scherrer Institut)

Production Facilities and Commercial Applications

Poster

In clinical operation, boron carbide (B4C) wedges are used as energy degraders to vary the proton beam energy between 238 MeV and 70 MeV. Each energy step is completed within 50 ms, corre-sponding to a change in water-equivalent penetration depth of approximately 5 mm. Upstream of the degrader, the beam has a diameter of about 2 mm. Passage through the boron carbide mate-rial introduces...

102. Prospects for AI-Assisted Accelerator Operation Toward Higher Reliability of SPring-8/SACLA

Hitoshi Tanaka (RIKEN SPring-8 Center)

Poster

Synchrotron light sources must deliver brilliant and stable photon beams to various user experiments, and their reliability depends on the cooperative operation of many subsystems. As light sources are becoming more complex, accelerator operation is getting harder for human operators to perform stably. Therefore, we believe that artificial intelligence (AI) and machine learning (ML) offer...

127. Quantifying the Health of SLAC's Linear Accelerators

Matthew Gibbs (SLAC National Accelerator Laboratory)

Poster

We have developed a new tool to give a real-time quantitative measurement of the overall health of the three large linear accelerators at SLAC: LCLS NC, LCLS SC, and FACET-II. This tool, called "Greenhome", reports the percentage of EPICS alarm severities in each state (major, minor, and no alarm). The values are accessible on a control system display and archived to track the trend. This...

73. Refurbishment of the LIPAc IT infrastructure

José Franco Campos (QST)

Poster

Construction and validation of the Linear IFMIF Prototype Accelerator (LIPAc) is on-going at the QST Rokkasho Institute for Fusion Energy, being conducted as an international collaboration between Japan and the European Union.

Nowadays, a robust IT infrastructure is critical to ensure the maintainability and reliability of any scientific installation. With this goal in mind, we are...

99. Reliability Allocation for the ESS Contamination Alarm for Target (CAT) System

Atefeh Sadeghzadeh (ESS)

Poster

The European Spallation Source (ESS) is developing the Contamination Alarm for Target (CAT) system as a Level 3 defence-in-depth measure for worker protection. CAT is intended to detect contamination leaking from the target helium coolant loop into surrounding utility areas and, when a defined threshold is exceeded, trigger evacuation through the facility's existing fire alarm system. Tritium...

105. Reliability Analysis of the Sirius Synchrotron Light Source

Wagner Bento (LNLS - CNPEM)

Poster

This work presents a new system for assessing the operational availability and reliability of the Sirius Synchrotron Light Source, operated by the Brazilian Synchrotron Light Laboratory (LNLS/CNPEM) in Campinas, Brazil. As a national public facility providing synchrotron radiation infrastructure for scientific research, reliable and transparent monitoring of accelerator operation is...

66. Reliability Assurance for Machine Protection Systems: Application to the LHC Superconducting Magnet Quench Detection System

Lukas Felsberger (CERN)

Poster

Reliable machine protection is critical for large-scale particle accelerators, as critical failures can cause severe equipment damage and long operational delays. For the LHC, an unprotected magnet quench could cause months of downtime. Ensuring safe operation while maintaining high machine availability requires a dedicated reliability assurance process. This includes qualitative hazard...

95. Reliability Lessons from ESS Linac Technical Commissioning

Mr Domenic Nicosia (European Spallation Source)

Poster

Verification and validation of individual subsystems are essential to demonstrate that they meet their design requirements and perform as intended. Particle accelerators, however, comprise multiple interconnected systems that must operate reliably together. Component acceptance and integrated testing therefore play complementary roles in establishing reliable operation, with some problems only...

56. Reliability tracking at ESS

Marc Munoz (European Spallation Source)

Poster

ESS is in the final steps of commissioning the Accelerator with reduced power in the Tuning Dump, before starting commissioning using the Target. To ensure that the set of Accelerator and Target work in a reliable fashion during the incoming Neutron Instruments commissioning and future operations, several tools and processes have been developed between the ESS Operations and Controls...

91. Reliability- and Availability-Driven I&C Design for STS Activated Cooling Loops

Chrysostomos "Tommy" Michaelides (ORNL-STS)

Poster

This poster describes the instrumentation and control (I&C) design for Activated Cooling Loops (ACL) 1 and 2 for the Second Target Station (STS) project at Oak Ridge National Laboratory (ORNL). The design approach emphasizes reliability and availability. ACL1 cools the rotating tungsten target; it is mission-critical for preventing target damage. ACL2 cools supporting target components and...

39. Reliable Operations of the Facility for Rare Isotope Beams

Andreas Stolz (FRIB/Michigan State University)

Poster

The Facility for Rare Isotope Beams (FRIB) is a U.S. Department of Energy Office of Science (DOE-SC) User Facility, providing rare isotope beams to scientists to make discoveries about the properties of rare isotopes, nuclear astrophysics, fundamental interactions, and applications for society. The FRIB accelerator is a high-power superconducting linear accelerator which can accelerate ions up...

100. Removals and Repurposing of the RHIC Accelerator for EIC

Caitlin Giorgio (Brookhaven National Laboratory)

Poster

After over two decades of operations, the Relativistic Heavy Ion Collider (RHIC) made its final collisions earlier this year. The conclusion of this program paves the way for future opportunities, namely the Electron Ion Collider (EIC). Since EIC will be utilizing some of the infrastructure at RHIC, a systematic de-installation process is required for the beamlines and their components through...

119. Report on the Cooling water system for SuperKEKB Main Ring Magnets

Taketo Nagasaki (ACCL, KEK)

Poster

The SuperKEKB accelerator is an asymmetric-energy collider using 7 GeV electrons and 4 GeV positrons. The two rings, each with a circumference of approximately 3 km, are installed in a tunnel buried 11 m underground. The beam is maintained by more than 2,600 magnets, and the final optical system uses superconducting magnets; the interactions are recorded by the Belle II detector. Most of the...

89. Robotic Interventions and Robot Reliability: Impact on Accelerator Availability

Hannes Gamper (CERN)

Poster

Robots capabilities continue to expand rapidly and are increasingly deployed across accelerator facilities to perform emergency response, predictive maintenance and inspection tasks. As robotic systems become an integral part of machine maintenance and safety concepts, the robot itself is shifting from an external tool to a critical element of the machine infrastructure. The reliability of the...

61. Software Design Patterns for Reliable Wire Scanner Operations at LCLS

Tyler Kabana (SLAC)

Poster

Wire scanners are essential beam diagnostics at the Linac Coherent Light Source (LCLS), but distributed control software spanning EPICS device interfaces, timing buffers, beam profile analysis, and operator GUIs present reliability challenges. This work presents a catalog of design patterns implemented in the LCLS wire scanner application stack to improve operational reliability and failure...

84. Spallation Neutron Source Facility Reliability Overview

Melissa Harvey (Oak Ridge National Laboratory - Spallation Neutron Source)

Poster

This will present an overview of recent reliability progress, operational experience, lessons learned, and improvement activities at SNS.

53. Statistical analysis of unknown downtimes at MAX IV

Rutger Nieuwenhuis (MAX IV)

Poster

At MAX IV, accelerator downtimes are classified strictly according to their root cause. When no root cause can be identified after exhaustive investigation, the downtime is labeled as unknown. Historically, there have been several periods during which a short-term increase in unknown downtimes has been observed. Such increases can for example be caused by a component malfunctioning in a way...

126. Systematic approaches to restarting after planned downtimes at MAX IV

David Winchester (Maxiv)

Poster

After a shutdown, returning the MAX IV storage rings to operation requires coordinated checks and approvals from several technical groups. A new start-up workflow has been implemented in J5, allowing checklists and approvals to be collected and followed in one place.
Once a ring is ready for injection, an updated Validation App is used to check the machine at different validation stages. The...

77. The CERN LHC consolidation program toward availability for the cryogenic process control system during LS3.

Marco Pezzetti (CERN TE/CRG)

Poster

After more than two decades of CERN LHC accelerator cryogenic operation, the LHC entered its third Long Shutdown period (LS3) in July 2026. Major consolidation and maintenance works are being performed across the entire CERN LHC Accelerator to prepare the HL-LHC for restart at higher energy. Some of these works concern the renovation of electrical process controls for parts of the cryogenic...

94. The Maintenance Workshop as a Reliability Enabler: Experience from LIPAc

Mr Alvaro Marchena (Consorcio IFMIF-DONES España, Granada, Spain)

Poster

The Linear IFMIF Prototype Accelerator (LIPAc) is preparing to commission its superconducting radio-frequency (SRF) linac and progress towards high-duty-cycle operation with a 125 mA, 9 MeV deuteron beam. From Phase C (beam acceleration through the SRF linac) onwards, LIPAc will require intensive multidisciplinary maintenance, testing and troubleshooting.
At its inception, LIPAc was...

12. Towards a coherent Functional Safety strategy for particle accelerators: challenges and ongoing work at CERN

Borja Fernandez Adiego (CERN)

Integrated Reliability across accelerator sub-systems – Importance of robust interface definition

Poster

International Functional Safety standards such as IEC 61508, IEC 61511 and IEC 62061 provide a structured framework for the design, development, validation, and management of safety-critical systems, covering hardware, software, and system architecture aspects. In the context of particle accelerators, these standards are increasingly relevant to ensuring robust and reliable protection for the...

92. TR30-1 Refurbishment Project and RF System Upgrade

Steve Sapriken (TRIUMF)

Poster

For over 35 plus years, the TRIUMF designed 30 MeV compact cyclotron (named TR30) was the original on site prototype medical isotope cyclotron, used to accelerate H- beam to be delivered to a target stations (either metal electroplated solid targets, or enclosed gas/liquid-based systems) for isotope production. As with all cyclotrons, systems do degrade over time due to water erosion of...

129. Transforming FLD: Bringing User-Led Fault Finding to ISIS Operations

phil campbell (STFC)

Poster

This poster will present the planned transformation of First Line Diagnostics (FLD), an internal fault-finding tool used by ISIS Operations to support faster fault diagnosis and reduce lost time.

FLD currently uses step-by-step fault-finding flowcharts to help operators diagnose equipment faults, resolve issues where possible, and identify when advice or support from equipment owners and...

62. Transitioning to a Centralized Work and Asset Management System at TRIUMF: Lessons Learned and Improvements in Reliability

Chloe Beaumier-Martin (TRIUMF)

Poster

TRIUMF is comprised of the 520 MeV Cyclotron facility and the Isotope Separator and ACcelerator (ISAC) facilities, in addition to the upcoming Advanced Rare Isotope Laboratory (ARIEL) and Institute for Advanced Medical Isotopes (IAMI) facilities. To continue managing reliability across an expanding and aging complex spanning a wide range of technical and service groups, TRIUMF has transitioned...

30. Vacuum Failure at the Australian Synchrotron's Linac

Mike Lafky (ANSTO Australian Synchrotron)

Poster

In February 2024, a catastrophic failure of the Linac vacuum caused approximately 30 hours of failure, the second longest downtime in the Australian Synchrotron’s history. The root cause was found to be a cracked Beryllium window that was leaking Sulfur Hexaflouride (SFX6) into the vacuum chamber. This presentation will discuss the early warning signs that were missed.