Previous IMMWs showed that stretched wire tomography is a viable measurement technique for measuring magnetic fields near the magnet surface. This method takes advantage of standard stretched wire measurement and uses field integrals as the input information for tomographic image reconstruction. Rotating the magnet around the axis perpendicular to the stretched wire and measuring field...
The measurement challenges and results from the series tests assessing production quality of the main magnet’ assembly, referred to as Triplet, for the upgrade of the Swiss Light Source(SLS)2.0 are described (2.0 stands for the whole renewal of the storage ring). A Triplet, which comes in four flavors, is at the heart of the seven-bend achromatic structure of SLS2.0 [1], implementing a...
Boundary Element Methods (BEM) can be applied to determine the value of the magnetic field at any point within a domain if the magnetic field components are measured on the surface of the domain. For large magnetic volumes, BEM provides an attractive alternative to fine three-dimensional Hall probe scans as the fields can be evaluated inside the volume with an arbitrary position and with a...
The Paul Scherrer Institut is currently involved in the upgrade of the Swiss Light Source (SLS2) accelerator. The goal is to increase the photon flux and the beam brilliance by keeping the same storage ring dimension. To achieve the new machine performance, a high density of magnets of about 1270 magnets instead of 388 is used. Therefore, the introduction of 372 permanent magnets (PM) was...
The use of Printed Circuit Boards (PCBs) for the inductive pick-up windings of rotating coil probes has made the construction of these precision magnetic measurement devices much more accessible. By combining multiple PCB probes within a single rotating coil structure, potential improvements for both speed and accuracy in harmonic fields measurements is explored.
The construction of next-generation light sources faces a critical challenge of high-precision alignment of the ring magnets. With the aim to acquire optimal and stabilized synchrotron radiation for upgrade of SOLEIL, the magnetic elements of the synchrotron must be aligned with very high accuracy. The magnetic measurement techniques such as vibrating wire and pulsed wire can be implemented to...
This abstract presents Metrolab’s recent advancements and innovations in NMR and Hall magnetometry, along with our pursuit of ISO 17025:2017accreditation. We introduce the MFC8246 motorized mapper, designed for precise electromagnetic field mapping within small bore magnets. Furthermore, we discuss the HallinSight technology, a significant advancement in three-axis Hall magnetometry, which...
Abstract—This abstract presents Metrolab’s recent advancements and innovations in NMR and Hall magnetometry, along with our pursuit of ISO 17025:2017 accreditation. We introduce the MFC8246 motorized mapper, designed for precise electromagnetic field mapping within small bore magnets. Furthermore, we discuss the HallinSight technology, a significant advancement in three-axis Hall magnetometry,...
In this contribution we will describe the activities of the Magnets and Insertion Devices group at ALBA since 2022 and the plans for the future. The ALBA synchrotron light source is undergoing a significant upgrade to transition into a fourth-generation facility by 2031, with a key goal of reducing its emittance by at least a factor of 20. The Magnets group at ALBA is responsible for the...
The Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory (LBL) is going through and upgrade where the ALS triple-bend achromat is replaced by a nine-bend achromat storage ring (SR) with on-axis injection using beam swapping from a triple-bend achromat accumulator ring (AR). About 700 accelerator magnets will be used for the ALS-U accelerator systems. The talk gives an overview...
We present recent developments in characterization approaches for a superconducting wavelength shifter currently being developed for the Brazilian Sirius synchrotron light source. The insertion devices will exhibit 6.6 T peak field with a 7 mm cryogenic magnetic gap leading to a 5 mm vertical gap inside the electron beam chamber. A primary approach based on an anti-cryostat chamber currently...
The Multipurpose Synchrotron Radiation Accelerator (4GSR), supported by the Pohang Accelerator Laboratory (PAL), has brightness 100 times higher and extremely low beam emittance (<100 pm·rad) compared to third-generation synchrotron radiation accelerator. To achieve these specifications, 4GSR storage ring is designed with 28 cells based on the Hybrid 7-Bend Achromat lattice concept, utilizing...
This talk presents the current status of magnetic measurement activities at CERN, including ongoing and future projects, major infrastructure upgrades, instrumentation R&D and recent noteworthy results.
- Introduction
Magnet Division, Brookhaven National Laboratory is one of the world's earliest magnet research and development laboratories. Having played a significant role in early collider projects including the Relativistic Heavy Ion Collider, Large Hardon Collider, and recent Accelerator Upgrade Project, it will play a major role in BNL’s Electron-Ion Collider. Contributions to other...
The Insertion Device (ID) Group at the National Synchrotron Light Source-II (NSLS-II) has been actively engaged in upgrading the existing ID measurement system, including enhancements to the pulsed wire bench. The group is also focused on developing a new superconducting adaptive gap undulator (SC-AGU) [1] and its measurement system. A new measurement system is needed for the 4-meter-long...
The Advanced Photon Source (APS) has successfully completed a major upgrade, transitioning its storage ring from a 7.0-GeV double-bend lattice to a 6.0-GeV multi-bend achromat (MBA) design. The efforts involved the fabrication, measurement, installation, and commissioning of:
- 1,380 storage ring magnets
- 46 new hybrid permanent magnet undulators (HPMUs)
- 26 existing HPMUs...
We present the design, construction, measurement and troubleshooting of a prototype hybrid Halbach quadrupole magnet. This magnet was significantly under-strength due to local demagnetization in the permanent magnet material. We discuss how this effect was uncovered, measured and reconstructed in simulations, as a guide to any reader considering similar magnets in future.
Full Abstract in...
The upgrade of the Swiss Light Source (SLS2) has been one of the major projects at the Paul Scherrer Institute (PSI) during the last years. One key element to provide higher photon flux and brilliance for the beamline users is the extremely dense lattice arrangement with a total of 888 electromagnets and 450 permanent magnets, all designed and measured at PSI.
This contribution focuses on...
The measurement campaign of a UE51 APPLE II device will be discussed, from individual magnet block measurements to final device shimming and installation.
Progress on adapting measurement systems of the magnet measurement lab will be reported, specifically the adaptation of the Helmholtz Coil measurement system to an EPICS based control system from a legacy OS/2 system.
The status of the...
ITER (International Thermonuclear Experimental Reactor) is the world’s largest Tokamak fusion project designed to demonstrate the feasibility of nuclear fusion as large-scale energy source.
It will be equipped with a large array of diagnostic instruments to provide the measurements necessary to control, evaluate and optimize plasma performance in ITER and to further the understanding of...
A vibrating wire measurement system, deployed in 2023/24 for locating the magnetic center of quadrupoles at the Canadian Light Source, was used recently to study the magnetic flux density of a test quadrupole magnet. Vibrating wire scans up to the n=200 wire harmonic (~10 kHz drive frequency) were measured in order to reconstruct the magnetic flux density across the length of the wire. The...
Hall probe measurement technology is a universally applied technology for the magnetic field mapping measurement of magnets. Traditional Hall probe measurement technology relies on a massive three-dimensional measurement platform, coupled with a three-dimensional adjustable magnet support frame, offering great universality and high positional accuracy in measuring medium and small magnets....
Precise magnet alignment based on a vibrating-wire method has been developed for the storage ring of an upcoming fourth-generation light source, SPring-8-II. All the multipole magnets in each straight section placed on a common girder will be aligned with an accuracy of ±0.005 mm or better with magnetic centers detected by the wire outside the machine tunnel before the installation. The same...
The multipurpose synchrotron radiation accelerator (4GSR), supported by Pohang accelerator laboratory (PAL), aims to achieve an ultralow emittance of less than 100 pm·rad, which requires a significantly reduced dynamic aperture size. The existing local bump injection scheme, which uses four kicker magnets to inject the beam, is unsuitable for 4GSR because it demands a large dynamic aperture....
Magnetic measurements are performed at Fermilab for both projects internal to the lab and as well as work for other laboratories. This talk briefly overviews the current projects and types of measurements we’re currently involved in, focusing on the more interesting or challenging. Recent projects include the US-LHC Hi-Lumi Accelerator Upgrade Project (AUP), Fermilab’s Proton Improvement Plan...
SENIS develops advanced sensors and measurement
instruments essential for the precise characterization of magnetic
fields in accelerator magnets and insertion devices. This abstract
presents the latest innovations and applications of SENIS’s
vertical and horizontal Hall sensors, 3D Hall sensors, low-noise
teslameters, cryogenic low-noise magnetic field transducers, 3D
magnetic...
We present the design basics, assembly procedure and the results of the characterization measurements for two magnetic appliances that are part of the current upgrade of the FLASH free electron laser at DESY Hamburg. A permanent magnet-based phase shifter will allow for a tuning of the electron trajectory between two insertion devices to provide constructive interference, while...
The SUNDAE2 magnetic field test facility aims to perform in-vacuum magnetic field measurements of superconducting undulators (SCUs) at the European XFEL. This work provides an update on the progress of SUNDAE2, which employs Hall probe, moving wire, and pulsed wire techniques for precise magnetic field characterization.
The Institute of Modern Physics of the Chinese Academy of Sciences is currently building the Cooler-Storage-Ring External-target Experiment (CEE) magnet. The magnet's measurement needs to be conducted online, as depicted in the figure 1. The magnet has a center magnetic field of 0.5T, and the measurement area inside the magnet must cover a volume of 2.0 m × 1.6 m × 1.6 m. Furthermore, it is...
