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Dirk Mergelkuhl (cern)08/10/2026, 10:10
The High-Luminosity Large Hadron Collider (HL-LHC) project introduces increased radiation levels in the Long Straight Sections (LSS),
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creating a strong demand for automated measurement and remote alignment solutions.
To address this challenge, CERN has developed the Full Remote Alignment System (FRAS) for the LSS, together with Ecartometry Measurement by Automatic Photogrammetric Survey... -
Jullada Saetiaw (Synchrotron Light Research Institute (Public Organization),Thailand)08/10/2026, 10:10
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 nmยทrad requires precise component placement and long-term positional stability, making a robust...
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Jean-Frรฉdรฉric Fuchs (CERN)08/10/2026, 10:10
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.
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In preparation, CERN โs Geodetic Metrology group surveyed a 2.8 km Large Hadron Collider (LHC) arc during the 2024โ2025 Year-End... -
Mika Masuzawa (KEK)08/10/2026, 10:10
The final-focus superconducting magnet system (QCS) in the SuperKEKB interaction region is housed in a large cryostat whose position is continuously monitored by gap sensors. This monitoring system has recorded the cryostat response to numerous earthquakes with a wide range of magnitudes and epicentral distances, providing a unique opportunity to study the mechanical behavior of a large...
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Hรฉlรจne Mainaud Durand (CERN)08/10/2026, 10:10
Future accelerators and fourth-generation storage-ring light sources impose increasingly stringent requirements for component positioning, stability, alignment, and uncertainty control.
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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... -
Shu NAKAMURA (KEK)08/10/2026, 10:10
At the KEK Tsukuba Campus, seven GS10 GNSS receivers have been installed at the delivery building and the auxiliary utility building, which are located along the SuperKEKB ring road, to collect positioning observation data continuously since 2012.
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Previously, specialised analysis software was used to calculate receiver positions from this data; however, due to license expiration, a large... -
Joshua Erikson (Canadian Light Source)08/10/2026, 10:10
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 beamโs 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...
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Tuyet Kim Tran (KEK)08/10/2026, 10:10
Alignment of SuperKEKB, whose nano-beam optics demand sub-millimetre magnet positioning, relies on laser-tracker surveys that have proven highly accurate โ the surveyed ring circumference was confirmed directly by the beam during commissioning. The survey is, however, performed intermittently, while the tunnel and the interaction region move on daily, seasonal and long-term scales, and the...
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Sikharin Suphakul (Synchrotron Light Research Institute)08/10/2026, 10:10
Prototypes of storage ring magnets for the Siam Photon Source II (SPS-II), Thailandโs next-generation 3โฏGeV synchrotron light source, have been successfully developed. The prototype magnets achieved a pole profile accuracy within 20โฏยตm and an assembly accuracy better than 40 ยตm. The original magnet alignment was performed using mechanical adjustment. Initial magnetic field characterization...
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Ting Ding (University of Science and Technology of China)08/10/2026, 10:10
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,...
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Jaehyun Cho (Institute for Rare Isotope Science, Institute for Basic Science)08/10/2026, 10:10
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,...
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Baohou Liu (University of Science and Technology of China)08/10/2026, 10:10
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...
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Dirk Mergelkuhl (CERN)08/10/2026, 10:10
Precise alignment of particle accelerator components requires stable, straight-line references over distances of several hundred meters. Pseudo-nondiffracting laser beams are promising candidates for optical-based, straight-line alignment reference systems because they maintain a narrow, high-intensity inner core over extended propagation distances. However, atmospheric fluctuations in the...
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Witold Niewiem (SLAC, Stanford)08/10/2026, 10:10
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...
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Vivien RUDE (CERN)08/10/2026, 10:10
The High Luminosity upgrade of the Large Hadron Col
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lider (HL-LHC) project aims to increase the integrated lu
minosity by an order of magnitude over the LHCโs original
design specifications. To achieve this objective, strict control
of the alignment of the new Inner Triplet superconducting
magnets installed around the ATLAS and CMS interaction
points is essential. This is provided by the... -
Behrouz Afzali Far (MAX IV Laboratory)08/10/2026, 10:10
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...
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Dirk Mergelkuhl (CERN)08/10/2026, 10:10
In high-precision metrology and geodetic network design, the achievable accuracy depends not only on the instruments
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but also on the measurement geometry โ in particular, on where component fiducials and instrument stations are placed.
These positions are traditionally chosen from experience and have to be fixed before any measurement is taken;
selecting them systematically therefore... -
Xiaolong Wang (University of Science and Technology of China)08/10/2026, 10:10
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...
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Torsten Miertsch (GSI Helmholtzzentrum Darmstadt)08/10/2026, 10:10
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...
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Georg Gassner (SLAC National Accelerator Laboratory)08/10/2026, 10:10
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.
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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... -
Albert Torrente (MAX IV Laboratory)08/10/2026, 10:10
This project presents the integration of high-precision 3D scanning data
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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... -
Jongdae Joo (Institute for Rare Isotope Science, Institute for Basic Science)08/10/2026, 10:10
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...
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Youen Delalande (Synchrotron SOLEIL)08/10/2026, 10:10
The SOLEIL II machine upgrade requires unprecedented alignment tolerances, down to +/- 20 ยตm 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...
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Thoreenz Soldevilla (National Institute of Physics, University of the Philippines Diliman, Quezon City, PHILIPPINES)08/10/2026, 10:10
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...
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