Prototypes of storage ring magnets for the Siam Photon Source II (SPS-II), Thailand’s next-generation 3 GeV synchrotron light source, have been successfully developed. The prototype magnets achieved a pole profile accuracy within 20 µm and an assembly accuracy better than 40 µm. The original magnet alignment was performed using mechanical adjustment. Initial magnetic field characterization...
The Siam Photon Source II (SPS-II) is Thailand's next-generation 3 GeV synchrotron light source currently under construction, comprising a 270 MeV linear accelerator, a 3 GeV booster synchrotron, a 3 GeV storage ring, and beamline facilities. Achieving the designed electron beam emittance below 1 nm·rad requires precise component placement and long-term positional stability, making a robust...
During the Long Shutdown 3 (LS3, from July 2026 to 2030), CERN surveyors will measure and re-align a large fraction of the 60 km accelerator beamline, requiring optimized survey procedures to ensure efficiency while maintaining accuracy and quality levels.
In preparation, CERN ‘s Geodetic Metrology group surveyed a 2.8 km Large Hadron Collider (LHC) arc during the 2024–2025 Year-End...
Future accelerators and fourth-generation storage-ring light sources impose increasingly stringent requirements for component positioning, stability, alignment, and uncertainty control.
Meeting these demands requires not only accurate instrumentation but also reliable and consistent measurement practices throughout the alignment chain.
To address these challenges collectively, an...
The Canadian Light Source has been operating its 2.9GeV storage ring since 2005. Beam-based metrics, primarily radio frequency tuning and orbit correction, provide a continuous, indirect measurement of the beam’s length and indicate a decrease in the storage ring beam circumference over time. The 171m storage ring is equipped with a 155-point wall and floor network to allow location of laser...
This study addresses the core problem of how to achieve high-precision measurement consistency in large-scale engineering metrology under high-noise and multi-disturbance environments.
First, for multi-station laser tracking systems, a GUM-based uncertainty propagation model is established, revealing the evolution laws of measurement accuracy and enabling accuracy optimization.
Second,...
The low-energy accelerator and experimental facilities at RAON are currently in operation following the completion of installation and initial alignment. Maintaining stable beam delivery requires periodic verification of beamline alignment accuracy relative to the facility's survey control network. This poster presents a geodetic alignment assessment of major RAON experimental beamlines,...
The SOLEIL II machine upgrade requires unprecedented alignment tolerances, down to +/- 20 µm for the most critical magnets of the storage ring. This specification demands full control of measurement uncertainties throughout the various steps of the alignment process. One of these steps is the survey, which aims to determine the position of the machine's components and thereby reconstruct its...
To satisfy the strict alignment tolerances of accelerator magnets for the Hefei Advanced Light Facility (HALF), it is essential to accurately fiducialize their magnetic centers. This paper describes a high-precision and efficient fiducialization method developed for HALF, based on a single stretched wire bench combined with a precision surface plate. The system enables the relative coordinates...
This paper presents an integrated three-component software suite developed at SLAC National Accelerator Laboratory for high-precision network measurement and adjustment in accelerator alignment. The system consists of AlignTrackPro for automated laser tracker data acquisition, a modernized version of the legacy LEGO adjustment engine, and LEGO Pipeline, which provides visualization through...
In preparation for the upcoming upgrade of the MAX IV Laboratory 3 GeV storage ring, tighter alignment tolerances are required for the magnet-cells to achieve the lower target beam emittance. We evaluate alignment strategies that ensure both local cell-to-cell smoothness and global alignment relative to the control network. Three candidate strategies are designed and evaluated using tailored...
Opening and reassembly are required in some accelerator magnet units during vacuum chamber installation, maintenance, or internal component adjustment. The reassembly state is commonly evaluated using high-precision top targets measured by laser tracker systems. This procedure provides a reliable engineering criterion for the recovery of the top-target region, but the targets are mainly...
Following previous IWAA presentations regarding progress on FAIR, this report outlines the status for 2025 and 2026. The campaigns over the last two years have included network measurements and their analysis, blue-lining in various machine areas, selective alignments to more complex structures in extremely hard-to-reach areas such as the Super-FRS, and the survey of parts of the machine that...
This poster presents the survey and alignment activities at the SLAC National Accelerator Laboratory since 2024. The major projects during the last two years have been the LCLSII-HE (Linac Coherent Light Source) project.
The LCLSII-HE project includes an additional 20 Cryomodule and an upgraded Soft X-Ray Undulator line. We re-mapped the existing monument network and monitored the effect of...
This project presents the integration of high-precision 3D scanning data
into the MAX IV spatial metrological network during the construction
of the new TomoWISE beamline.
By registering point cloud data within the facility global coordinate system,
the scanned data can be accurately overlaid with the beamline CAD model,
providing a reliable digital representation of the installation...
The Mu2e experiment at Fermilab will be 10,000 times more sensitive than previous experiments looking for muon-to-electron conversion. This precise and complex apparatus will be able to produce 200 million billion muons per year. The Mu2e experiment layout in the MC-2 Building consists of three superconducting solenoids magnets: Production Solenoid (PS), Transport Solenoid (TS), and Detector...
RAON requires a stable geodetic reference framework to support the precision alignment of accelerator beamlines and experimental devices. This work presents the maintenance of the RAON survey control network, including periodic measurements to evaluate floor monument stability and update alignment reference coordinates. As measurements must be completed within limited shutdown periods, recent...
Structured Laser Beams (SLBs) offer a viable alternative in generating straight reference lines for long-distance alignment systems in particle accelerators. While prior research has utilized quadrant detectors to demonstrate displacement sensitivity for various beam types, this study extends that evaluation to an optical system experimentally verified to diverge by only 0.1 mrad at a...
