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John Schmerge (SLAC)08/10/2024, 08:45
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Georg Gassner (SLAC)08/10/2024, 09:05
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Georg Gassner (SLAC)08/10/2024, 09:20
This presentation will provide an overview of the SLAC Metrology organization, focusing on Alignment group activities. The presentation will also cover the instrumentation used for everyday work and projects we recently worked on such as the LCLS-HE undulator upgrade, the Rubin Observatory LSST Camera, and the Super CDMS project.
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Jana Barker (Deutsches Elektronen-Synchrotron DESY)08/10/2024, 09:45
PETRA IV requires stringent alignment accuracies for close to 300 girders and over 3000 magnets, despite pervasive space constraints. This paper summarizes the alignment progress of the project's current prototype
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(pre-project) phase, as well as future plans. Under development are two novel multipole magnet referencing concepts photogrammetric and laser tracker measurements. Each concept... -
Yubo Xing (Sun Yat-sen University)08/10/2024, 10:35
For stable operation of accelerators, high-precision alignment, positioning, and installation are crucial. Installing all equipment individually inside the tunnel poses safety risks as personnel may be exposed to enclosed and potentially radiative environments for extended periods. To address the challenges of long adjustment times and prolonged maintenance within the tunnel, most accelerator...
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Virgil Bocean (Fermilab)08/10/2024, 11:00
Proton Improvement Plan-II (PIP-II) is Fermilab’s plan for upgrading the accelerator complex with the goal of providing proton beam power of 1.2 MW on target at the start of operations of the Long Baseline Neutrino Facility (LBNF). It will also create a platform for long term development to multi-MW capabilities to support a broader Fermilab research program.
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The presentation summarizes the... -
Xiaolong Wang (IHEP)08/10/2024, 11:25
The Circular Electron Positron Collider (CEPC) is a next-generation particle collider planned for construction in China, with the aim of conducting precision studies of the Higgs boson. The main ring of the CEPC has a circumference of 100km, the total number of components to be aligned is about 60000, and the alignment accuracy requirement between adjacent components is better than 0.1mm. The...
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David Martin (ESRF), Hélène Mainaud Durand (CERN)08/10/2024, 13:00
Following on from the International Workshop on Accelerator Alignment IWAA 2022, an alignment seminar was organized at the ESRF in June 2023. Four European laboratories: CERN, ALBA, SOLEIL and ESRF participated in this event. It was a very successful one-day event, divided into 7 sessions of 1h each dedicated to specific topics of mutual interest. These topics included: application of...
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David Martin (ESRF)08/10/2024, 13:25
When we are asked to align something in an accelerator, on a beamline or in a detector, there is always a desired tolerance associated with the alignment. Generally, this tolerance describes how well the something, for example a quadrupole magnet, should be aligned with respect to something else, for example, the adjacent quadrupole magnet.
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The problem is that often the person giving the... -
Fabien Rey (European Spallation Source)08/10/2024, 13:50
Over the last years , the European Spallation Source has gone through an intense phase of installation of critical equipments requiring accurate positioning. All previous efforts invested to express geometrical requirements using technical drawings and ISO GPS language have been pursued and largely applied to produce installation drawings based on a generic template. An extended use of ISO GPS...
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David Krawczuk (Fermilab)08/10/2024, 14:40
Fermilab’s PIP-II project will result in a new beamline approximately 510 meters long. A geodetic control network will need to be established to precisely align the beamline components in the tunnel. This design focused on the tunnel network, as the surface network had already been considered. After selecting the geometry, instrumentation, and methodology, a pre-analysis was performed to...
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Cristina Gonzalez-Torres (ESRF)08/10/2024, 15:05
The European Synchrotron Radiation Facility (ESRF) was established in 1988 as the world’s first 3rd generation light source. Alignment was critically important. The quadrupole and sextupole magnet alignment tolerances were 100 µm in both the horizontal and vertical directions perpendicular to the beam.
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The vertical tolerance was achievable with high precision levelling, but in the late 1980’s... -
Brian Fuss (SLAC)08/10/2024, 15:30
The Metrology Department at SLAC develops and hosts numerous GIS (Geographic Information System) websites for most departments at the laboratory. In addition, the department creates large format maps for SLAC users and departments that are displayed throughout the lab. This presentation will outline some of the GIS work that SLAC Metrology provides, such as for environmental protection soil...
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Zihao Wang (IHEP)09/10/2024, 08:35
The Very low emittance of High Energy Photon Source (HEPS) demands high stability and adjusting performance of the magnet support. The alignment error between girders should be less than 50 μm. Based on that, the adjusting resolution of the girder are required to be less than 5 μm in both transverse and vertical directions. Besides, the natural frequency of magnet support assembly should be...
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Xiaoye He (National Synchrotron Radiation Laboratory)09/10/2024, 09:00
Hefei Advanced Light Facility (HALF), a key mega-science facility, has started civil construction since June 2023 in Hefei, China, and National Synchrotron Radiation Laboratory (NSRL) is responsible for the construction. HALF is a 4th generation diffraction limited synchrotron radiation light source which includes a 192 m injector, a 138.4 m transport line, and a storage ring with a...
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Peter Manwiller (Facility for Rare Isotope Beams (FRIB) at Michigan State University)09/10/2024, 09:25
Research laboratory engineering departments encourage employees to pursue professional development in their field. Within the accelerator alignment community, limited introductory resources address the unique considerations of this specialized discipline. This paper aims to cover important alignment concepts in an engaging and exploratory manner utilizing a multiple-choice quiz format to help...
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Xudong Zhang (Institute of Modern Physics, Chinese Academy of Sciences)09/10/2024, 09:50
The accurate placement of magnets is essential for accurate magnetic field measurements. The current positioning technique employed for harmonic coil measurement is inefficient due to its labor-intensive and time-consuming nature. Therefore, we use four cameras to monitor the position of the magnet due to its non-contact feature, and an electrically driven Stewart platform is utilized to...
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Tse-Chuan Tseng (NSRRC)09/10/2024, 10:35
A simplified hydraulic levelling system (HLS) developing project has been carried out to monitor the ground settlement of TPS tunnel within 10 um resolution in these years. An IR photonic type integration was proposed to meet the requirement. This design consists of simple circuits with separated IR led and phototransistor to sense the water surface variation inside a small chamber installed...
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Joffray Guillory (Conservatoire national des arts et métiers (CNAM))09/10/2024, 11:00
Cnam has developed Arpent, a two-wavelength ADM where the distances do not depend on the air refractive index, but only on the dispersion. By simultaneously measuring two optical path lengths at two different wavelengths, it is no longer necessary to determine the air temperature and pressure. Arpent measures distances consistent with the SI-metre definition and achieves uncertainties better...
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Matthias Saure (Leica Geosystems AG)09/10/2024, 11:25
During IWAA2022 at CERN in Geneva a discussion was raised by laser tracker users about the differences in the handling of orient-to-gravity (OTG) measurements between Leica Absolute Tracker AT403 and AT9x0/AT500.
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The talk will present a new approach for AT9x0 and AT500 in Spatial Analyzer to provide gravity referenced coordinates in the instrument frame to overcome this issue. -
Witold Niewiem (CERN)10/10/2024, 08:35
The Structured Laser Beam (SLB) is a pseudo-non-diffractive optical beam characterized by the low divergence of the Inner Core (IC), down to 10 μrad, and the presence of concentric rings, with the most prominent being the Outer Ring (OR). The size of the IC and OR can vary depending on the SLB generator setup. SLBs have the potential to serve as straight reference lines for long-distance...
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Jean-Christophe Gayde (CERN)10/10/2024, 09:00
As part of the study on using structured laser light for alignment, an innovative technique is proposed for generating symmetrical pseudo-non-diffracting layers of caustic optical beams, known as Layer Beams (LB). The state of the art for producing similar beams consists of using spatial light modulators. Our approach is based on the design of a generator with a specific arrangement of...
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Zhenqiang He (Institute of High Energy Physics, Chinese Academy of Sciences (IHEP CAS))10/10/2024, 09:25
Alignment of superconducting cavities is a critical concern for the China Spallation Neutron Source Phase II (CSNS II) linac. To measure cavity displacement during the cooling process to liquid helium temperature, a new laser-based Poisson Spot Monitor (PSM) system was introduced. This system utilizes the diffraction spot captured on a CMOS camera when a parallel laser beam passes through a...
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Hélène Mainaud Durand (CERN)10/10/2024, 09:50
The High-Luminosity Large Hadron Collider (HL-LHC) project at CERN aims to enhance the LHC's performance and expand its potential for discoveries beyond 2029. New components will be installed within the 220 meters before the collision points of the ATLAS and CMS experiments, including 16 NB3Sn quadrupoles to focus the beam before collision and 8 radio frequency crab cavities to allow beam...
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Jean-Frederic FUCHS (CERN)10/10/2024, 10:30
Accurate alignment of beam components in particle accelerators is crucial to optimize machine performance and enhance precision measurement in the experiments. CERN is developing a new process for calculating beam position offsets directly in the field during the alignment stage.
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This process benefits from recent developments within CERN’s adjustment software, LGC (Logiciel Général de... -
Lei Wu (IHEP)10/10/2024, 10:30
The HEPS storage ring consists of 48 7BA cells, with multipole magnets in each cell supported by several multipole girders. A set of alignment adjustment mechanism is present between each multipole magnet and the girder to fine-tune the magnet's six degrees of freedom position. The majority of magnet adjustment mechanism structures utilize vertical wedge blocks and horizontal and longitudinal...
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Hélène Mainaud Durand (CERN)10/10/2024, 10:30
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) aims to enable continuous operation at instantaneous luminosities over double the current LHC value. To meet this goal, components installed in the Long Straight Sections around the ATLAS and CMS experiments must be aligned to within a tolerance of 0.45 mm vertically and 0.2 mm radially over a length of 420 meters. This precise...
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Yuichi Okayasu (KEK)10/10/2024, 10:30
Since 2020, we have been continuing to conduct control surveys of the KEK electron-positron accelerator using a laser tracker and digital level. Since analysis has confirmed a trend in beamline fluctuations, we introduce an attempt to experimentally introduce a crack displacement meter to confirm the trend in fluctuations.
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Ningchuang Zhou (IHEP)10/10/2024, 10:30
The storage ring of high energy photon source (HEPS) has about 1536 vacuum tubes, which need different supports to align them to the desired position and keep their stability. According to the operational requirements of the storage ring vacuum tubes, this article introduces several types support structure of vacuum tubes. And finite element thermal-stress analysis was conducted on the vacuum...
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Florian Barcet (CERN)10/10/2024, 10:30
This paper presents a novel method for direct wire offset measurements using photogrammetry, with a focus on integrating a link to gravity. This development is motivated by the High Luminosity Large Hadron Collider (HL-LHC) project, where increased radiation in the Long Straight Section (LSS) necessitates automating the wire measurement process with a Full Remote Alignment System (FRAS). To...
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Youen Delalande (Synchrotron SOLEIL)10/10/2024, 10:30
Located in the heart of the Paris-Saclay university and technology park, SOLEIL is preparing a major upgrade of its machine and beamlines. This project known as SOLEIL II aims to provide a 4th generation synchrotron light source by the end of 2030. The new storage ring will have an emittance of 85 pm.rad which will naturally arise challenging questions about the solutions to be chosen for its...
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Zihao Wang (Institute of High Energy Physics, Chinese Academy of Sciences (IHEP CAS))10/10/2024, 10:30
The High Energy Photon Source (HEPS) has been under construction since 2019. It is designed to be the first high-energy diffraction-limited synchrotron light source in China. To achieve an ultra-low emittance of less than 60pm.rad, substantial efforts have been invested in the alignment process of the SR. This involves thousands of elements being arranged in a very tight space. To fulfill such...
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Zhiqiang Jiang (Shanghai Hard X-ray FEL Facility)10/10/2024, 10:30
Recent progress of the SHINE(Shanghai Hard X-ray FEL Facility)
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Mika Masuzawa (KEK)10/10/2024, 10:30
SuperKEKB is a double ring collider consisting of a 7 GeV electron ring (HER) and a 4 GeV positron ring (LER) with a circumference of 3 km.
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SuperKEKB was constructed by reusing the KEKB tunnel that was shut down in 2010. The KEKB beamline magnets were aligned in the same plane at the time of construction. SuperKEKB utilizes “nano-beam scheme,” where two low emittance beams collide with a... -
49. Status on geodetic studies and alignment perspectives for the CERN Future Circular Collider (P8)Witold Niewiem (CERN)10/10/2024, 10:30
The ongoing feasibility study for the Future Circular Collider (FCC-ee) planned to be built at CERN raises survey and geodetic challenges. Developing an alignment strategy for the 8832 magnets within the 91.2 km circular tunnel, associated transfer lines, and the 2 or 4 experiments is critical. A robust geodetic infrastructure, including the definition of coordinate reference systems and the...
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46. Survey and Alignment Design for the Shenzhen Superconducting Soft-X-ray Free Electron Laser (P5)10/10/2024, 10:30
The objective of the Shenzhen Superconducting Soft-X-ray Free Electron Laser (S³FEL) is to develop a free electron laser source utilizing a superconducting linear accelerator operating at an electron energy of 2.5GeV. The facility has a length of approximately 1.8km and features a wavelength range of 1 to 30nm for its Free Electron Laser, aimed at advancing cutting-edge scientific research and...
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Martin Joska (European Spallation Source)10/10/2024, 10:30
At the European Spallation Source (ESS), we extensively use Spatial Analyzer (SA) for a variety of applications, including network calculations. A significant challenge has been to involve local gravity observations during the network calculation in SA. To address this, we have developed a solution to represent the local geoid within SA. In this poster we will present our methodology and...
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Guillaume Kautzmann (CERN)10/10/2024, 13:05
LGC (Logiciel Général de Compensation) is a software that computes position estimates and associated statistics based on observations obtained by CERN surveyors. Since the mid-1980s, LGC has been a crucial tool to perform geodetic computations in various contexts - from simple levelling campaigns to advanced monitoring projects. The CERN Geodetic Metrology group continues to maintain, improve,...
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Bertrand Nicquevert (Ecole Normale Supérieure de Paris Saclay (+ LBNL + CERN on special leave))10/10/2024, 13:30
ToLiP, or minimum set of situation features made of (at most) a poinT On a Line In a Plane, has been introduced as an intermediate object between any integral feature's geometry and the coordinate system representing its situation (location and orientation). CoToLiP is the tool to deal with the composition of two ToLiPs. The paper gives background on how this is built and used to encode...
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Luyan Zhang (IHEP)10/10/2024, 13:55
CEPC, the next generation of particle colliders which is in planning. The storage ring of CEPC is 100 km long, and the collimation accuracy between adjacent precollimation units is better than 0.1mm. The measurement speed of traditional laser tracker measurement method can not meet the requirements of construction period. This report presents a new measuring instrument based on photogrammetric...
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Shang Lu (IHEP)10/10/2024, 14:20
In order to achieve 10μm pre-alignment accuracy of high energy photon source (HEPS) storage ring in transverse and vertical, four laser trackers were used for set up a four-station multilateration measurement system. Experiment results show that the absolute position measurement accuracy is within 7.1μm. Three pre-alignment standard workstations have been established. And the laser...
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Florian Barcet (CERN)10/10/2024, 15:10
The increasing dimensions and constraints for next-generation accelerators are driving the development of new methods and strategies for automated alignment measurements. While the existing LHC collimator survey train has demonstrated significant potential, it also revealed the drawbacks and shortcomings of such a system.
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A next generation survey train is therefore under development, taking... -
Hélène Mainaud Durand (CERN)10/10/2024, 15:35
The High Luminosity Large Hadron Collider (HL-LHC) project is an upgrade of the LHC to enable continuous operation at instantaneous luminosities over double that of the current LHC value. To do so, nearly 1.2 km of accelerator components of the present LHC machine will be replaced, applying new, innovative technologies. This includes a Full Remote Alignment System (FRAS) to continuously and...
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Lingling Men (IHEP)10/10/2024, 16:00
Precision in fiducialization and alignment of insertion devices (IDs). Conventional sensor systems utilizing Hall probes for high-precision magnetic field measurements face limitations in determining the absolute position of the magnetic center of IDs. In this paper, the Magnetic Landmark (MLK), a novel solution based on a magnetized block structure, is designed to address this challenge. The...
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Tong Wang (Institute of High Energy Physics, Chinese Academy of Sciences (IHEP CAS))11/10/2024, 08:35
The High Energy Photon Source(HEPS) was a first fourth-generation synchrotron light source in China, it has an energy of 6 GeV and a circumference of 1360m. Construction began in 2019, and beam commissioning started on July 23,2024. The first beam circulation was achieved on the first day, proving the success of the alignment. This report will introduce the alignment strategy, and the method...
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Guillaume Kautzmann (CERN)11/10/2024, 09:00
CERN surveyors have been performing the smoothing of beamlines for decades using the 2D + 1 measurement and calculation process, where computing the planimetric (XY) and altimetric (H) data is performed independently and separately. Direct leveling (1D) is still recognized today as the most efficient method to allows accurate vertical determination over long distances.
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CERN practices are... -
Sebastien Ducourtieux (Synchrotron SOLEIL)11/10/2024, 09:25
Located in the heart of the Paris-Saclay university and technology park, SOLEIL is preparing a major upgrade of its machine and beamlines. This project known as SOLEIL II aims to provide a 4th generation synchrotron light source by the end of 2030. The new storage ring will have an emittance of 85 pm.rad which will naturally arise challenging questions about the solutions to be chosen for its...
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Hongyan Zhu (Lawrence Berkeley National Lab)11/10/2024, 09:50
The Advanced Light Source (ALS) achieved first light in 1993. 30 years later, a major effort is taking place to upgrade it to 4th generation light source. There will be two accelerators reside in the same tunnel, one is Accumulator Ring which is hung on the inner wall, another one is Storage Ring which will replace the current ALS Storage Ring. RF system will be shared by the two Accelerators....
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Chenghao Yu (Brookhaven National Lab)11/10/2024, 10:35
Monitor the changes of accelerator components and tunnels are one of the major efforts when the machine is running. Several recent monitoring efforts will be discussed.
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Long term measurements above truck tunnel will be updated. Besides, a new wire position system is installed. The system, data processing and results will be shown.
The circumference changes of storage ring in one year are... -
William G. Jansma (Argonne National Laboratory)11/10/2024, 11:00
The Advanced Photon Source (APS) is a synchrotron X-ray facility located at Argonne National Laboratory, in operation since 1996. The APS recently completed an extensive upgrade, replacing the original APS electron storage ring with a state-of-the-art multi-bend achromat machine. The upgraded storage ring generates X-rays up to 500 times brighter than the original ring.
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After more than 25... -
Hongyan Zhu (Lawrence Berkeley National Lab)11/10/2024, 11:25
The ALS-U project is upgrading the existing Lawrence Berkeley National Laboratory Advanced Light Source to a diffraction-limited soft x-ray light source. There will be two accelerators residing in the existing tunnel, the Accumulator Ring (AR) and the Storage Ring (SR). AR pre-staging (assembly of magnets on rafts) and their installation in the tunnel are currently taking place. This talk will...
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Georg Gassner (SLAC)11/10/2024, 11:50
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