EPICS stands for "Experimental Physics and Industrial Control System" but the physics in that name is doing more assuming than it should. Small chemistry laboratories gas-handling rigs, catalytic reactors, surface-science setups face exactly the same operational reality as small physics beamlines: one or two people covering controls part-time, hardware expected to run for 10 years, no...
The event timing system has been operating reliably in multiple large accelerator facilities worldwide. Recent developments include a network-wide global interlock function driven by special downstream event codes, a priority-queueing mechanism for full-duplex event codes, and a GNSS-synchronized hardware time-stamping function compatible with the MRF timing system. The system has also been...
Standard EPICS integration of MRF VME-EVR timing modules relies on VME CR/CSR space for board discovery, base address assignment, and interrupt setup. To address the issue where certain VME CPUs lack hardware support for CR/CSR access in their PCIe-to-VME bridge, an integration approach was implemented to configure the EVR base address and interrupt over the EVR's onboard UDP interface. A...
The High Energy Photon Source (HEPS) is a 6-GeV fourth-generation synchrotron light source developed by the Institute of High Energy Physics (IHEP), Chinese Academy of Sciences. It employs a novel on-axis swap-out injection scheme. The timing system is a key subsystem that supplies triggers and clocks to both the accelerators and the beamlines and coordinates the entire facility operation,...
The China Spallation Neutron Source Phase II (CSNS-II) imposes stringent requirements on the real-time monitoring and safety of high-intensity proton beams, necessitating microsecond-level response times for the Fast Protection System. This paper presents a high-throughput, ultra-low-latency data acquisition and processing platform designed on the Advanced Telecommunications Computing...
A complete EPICS IOC based on EPICS Base 7 and StreamDevice has been developed for the 33600A dual-channel function/arbitrary waveform generator with a LAN interface. It is designed for practical applications such as CT calibration and excitation signal generation in beam experiments.
This lightning talk introduces the migration project of the utility facility control system at the China Spallation Neutron Source (CSNS). CSNS auxiliary infrastructure including water cooling, compressed air, HVAC and power distribution originally adopted commercial SCADA software for control. Although commercial SCADA supports fast HMI development and mature industrial functions, it brings...
Equipment at the high-voltage terminal of the main acceleration section of a megavolt-grade tandem accelerator operates inside an SF₆‑filled pressure vessel at 0.607‑0.709 MPa (approximately 7 atm). High-voltage fluctuations and spark‑over events inside the accelerator generate intense electromagnetic radiation, and off-the-shelf signal-conversion devices cannot adapt to such harsh conditions....
The Mu2e experiment, under construction at Fermilab, will search for charged lepton flavor violation in the coherent conversion of a muon to an electron in the electric field of an aluminum nucleus. The planned sensitivity of the experiment will be achieved using a pulsed proton beam with a time structure that allows rejection of beam-induced backgrounds. The Mu2e Extinction Monitor measures...
Two EtherCAT‑based motion control systems have been integrated into EPICS via Modbus TCP at the China Spallation Neutron Source (CSNS). The Very Small Angle Neutron Scattering (VSANS) instrument employs Beckhoff hardware paired with BiSS‑C absolute encoders to implement full‑closed‑loop control of more than 60 axes. Laser interferometer measurements verify its linear positioning accuracy of...
The timing system of J-PARC accelerator complex has been in operation over 20 years. For J-PARC Main Ring, 45 VME-type timing receivers have been utilized since 2008. However, maintenance has now become nearly impossible.
A new PLC-type receiver was designed in 2024 to replace the VME-type ones. First mass production of 20 pieces took place in 2025. In April 2026, the first PLC-type receiver...
To meet the 500 kW target power of CSNS-II upgrade, a digital LLRF system is developed for the superconducting linear accelerator with 324 MHz spoke and 648 MHz elliptical cavities. An RFSoC-based hardware platform is adopted for direct RF sampling, robust control algorithm is implemented to suppress thermal drift, beam loading and Lorentz detuning. Cavity tests verify amplitude stability...
Handling radioactive isotopes in the CSNS Phase-II project requires high-precision automation to minimize human radiation exposure. The final deployment will feature a heavy-duty robotic arm mounted on a ground track operating in highly constrained, shielded environments. However, as the final hardware is not yet deployed, this abstract presents a lab-scale validation framework using an AUBO...
Personnel Safety Systems (PPS) at laser-plasma accelerator facilities rely on card-access door controllers to protect radiation-controlled areas. A well-known weakness is tailgating: an unauthorized person follows an authorized entrant through the door before it closes, leaving no credential record that the PPS can act on.
This work presents a multimodal tailgating detection system...
High-repetition-rate petawatt laser facilities require deterministic and stable large-scale image transfer for online multi-camera diagnostics. Even when cameras and IOCs maintain steady frame updates, complete image-group readout on the client side may experience severe tail latency, introducing uncertainty into online visualization, data logging, and feedback control. In this work, we...
Femtosecond synchronization is essential for the coordinated operation of high-repetition-rate free-electron lasers and ultrafast experiments. To meet the synchronization requirements of the S³FEL project, we have designed and developed all synchronization control hardware in-house, enabling customization for different synchronization tasks and supporting long-term maintenance and upgrades....
The High Energy Photon Source (HEPS), China's first fourth-generation synchrotron radiation facility, is designed to provide extremely high brightness and coherence for cutting-edge scientific research. Its Phase I project encompasses 15 beamlines, requiring precise motion control for approximately 1800 axes of optical components and endstation devices. To address the stringent demands of...
