Siam photon source-II (SPS-II) is a new synchrotron facility that is going to be built in Thailand. There are seven beamlines to be constructed together with the new machine. These consist of one soft X-ray beamline, two X-ray absorption beamlines, three X-ray scattering beamlines and one imaging beamline in the lineups. The designs and the selections of insertion devices, front end and beamline components will be presented together with the optical simulation results and the considerations for thermal load management using the combination of front-end components, filters, white/pink beam slits and mirrors along each beamline. New experimental station equipment and the existing equipment from the current Thai synchrotron facility (Siam Photon Source-I) that will be transferred to SPS-II will also be discussed.

A new catalytic cell has been developed for the Infrared Spectroscopy and Microscopy (MIRAS-BL01) beamline at the ALBA synchrotron. The aim of this instrument is to study catalytic reactions, crucial for advancing sustainable chemistry by enabling energy-efficient processes and minimizing by-products. Infrared (IR) spectroscopy offers key molecular insights, helping identify active species, understand mechanisms and link structure to activity. It also monitors catalysts in real time, revealing structural changes that affect performance. The reactor is designed to operate in transmission mode from vacuum conditions to pressures up to 20 bar of different mixtures of gases and within a wide temperature range, covering from cryogenic temperatures up to a maximum of 500°C, while allowing the sample to move vertically few millimetres in order to alternate between exposing it and the background. Currently in production, the design's key aspects are presented, covering the sample position mechanics, the various FEA calculations performed as well as the necessary auxiliary systems, such as cooling mechanisms and the pressurized gas circuit.

The design of an accelerator system requires translating the lattice into an engineering design model from which the machine can be built, fulfilling the requirements of beam dynamics and from mechanical engineering. To achieve this in an efficient manner, a systematic and manageable iterative design process has been established, which ensures consistency between the lattice and the mechanical model and enables a fast translation of the calculated lattice into a CAD model with correctly placed components within one day through the use of newly developed automation tools. An analysis process of the lattice, a highly modular CAD structure focused on maximal reuse, and strategic variant management together minimize the number of variants necessary. As a result, design, manufacturing and logistics efforts are significantly reduced. This approach establishes a fundamental toolkit. It ensures the traceable integration of physics and engineering requirements throughout the system design process of PETRA IV, the planned next-generation synchrotron light source at DESY.

This study presents the design and fabrication of a me-chanical compensation system aimed at neutralizing the magnetic attraction forces inherent in insertion devices (IDs) used in synchrotron radiation facilities. In long IDs, such as those measuring 4 meters in length, multiple compensation modules—typically four—are required to maintain structural stability and magnetic field uniformi-ty. In this work, a single compensation module was de-signed, fabricated, and installed on a test platform to verify the feasibility and mechanical performance of the proposed mechanism. The system integrates a parallel linkage mechanism with a spring assembly consisting of twelve coil springs. The parallel linkage ensures synchronized and stable movement of the magnetic arrays with minimal structural deformation, while the spring assembly provides a counteracting force that balances the increasing magnetic attraction as the ID gap narrows. Although the mechanism was not installed on a working ID, test results demonstrate its effectiveness in reducing structural load and maintaining precise displacement control under simulated magnetic force conditions. This confirms the concept's viability and its potential for improving operational efficiency and safety in future ID applications.

Synchrotron light sources commonly provide users with two types of insertion devices for experiments in biology, medicine, and other fields: in-vacuum undulators (IU) with short period lengths for medium-energy photon sources and cryogenic permanent magnet undulators (CPMU) for higher photon energy. The strong magnetic field generates significant forces on the insertion device magnets, leading to structural deformation and ultimately degrading the magnetic field quality. This paper presents the design and measurement methods of an in-vacuum tapered undulator, analyzes the simulation and measurement results of its structural deformation, and introduces how a flexible structure can be used to establish nonlinear magnetic force compensation to improve system performance

Integrating permanent magnets as substitutes for large electromagnets offers advantages such as energy savings, space efficiency, and low maintenance. An electromagnetic dipole magnet on the TPS transfer line is proposed to be replaced by a permanent magnet. This permanent magnet will be hybridized with an electrical coil to allow fine tuning of the magnetic field. Additionally, an NMR system is integrated into the magnet to monitor long-term field variations. The magnetic circuit design for the 1m-long permanent magnet has been preliminarily completed. Currently, the prototype-1 magnet with 0.15 m employs adhesive technology to bond small magnetic blocks into larger ones. The magnetic field strength and uniformity of prototype-1 meet the design specifications. NiFe material has also been used for temperature compensation. During the development process, some assembly procedures and mechanical designs were revised. The prototype-2 is currently in production. This paper presents the magnetic circuit design, the mechanism design, the magnet prototype and the field measurement result of the permanent dipole magnet.

Permanent Magnets (PM) have been widely used in Synchrotron Light Sources for insertion devices and recently for the accelerator multipole magnets. The NSLS-II accelerator upgrade is based on the complex bend lattice that will use combined function permanent magnet-based dipole-Quadrupole (PMQ)*. These PMQ’s need to be characterized and tuned to make sure the required field harmonics can be achieved. The Halbach type design is considered for the PMQs. To achieve the required field quality with the Halbach PMQ, a field harmonic correction method based on assembly of small PM blocks called “Magic fingers” (MF) is developed. This paper presents the radial MF magnetic and mechanical design, the prototype and the correction results.

The National Synchrotron Light Source II (NSLS-II) facility at Brookhaven National Laboratory uses an ultra-high vacuum (UHV) system to operate, which typically uses circular ConFlat (CF) flanges to connect vacuum components together. With varying equipment design restrictions, the implementation of non-circular CF flanges is being studied as a possible alternative, as it has been used in other accelerators. Here, an analysis of noncircular CF flanges was conducted to identify sealing problems associated with such flanges, particularly at the HEX beamline. Autodesk Inventor and ANSYS Workbench were used to create models and conduct finite element analysis (FEA) simulations, respectively. Parameters relating to the flange rigidity and geometry were performed to find problem areas. The results suggest that the geometry, combined with plastic deformation of the CF knife-edge and uneven pressure distribution, may contribute to the overall sealing failure.