22nd International Magnetic Measurement Workshop (IMMW22) - Virtual
The Brazilian Synchrotron Light Laboratory (LNLS), at the Brazilian Center for Research in Energy and Materials (CNPEM) will host virtually the 22nd International Magnetic Measurement Workshop (IMMW22) from 26- 30 September 2022.
IMMW22 is a week-long event, with the aim of providing a forum for presentations and open
discussions on the equipment and techniques used to measure, characterize, and fiducialise magnetic fields – typically of accelerator magnets and insertion devices.
The event will comprise 5 days of posters and plenary sections, where on plenary a group of 7 speakers will have 20 minutes to present their work and answer questions. These meetings will be recorded and made available on the contribution. After the daily plenary, and on the next morning, each speaker has the opportunity to present their work in an exclusive poster session.
Topics covered:
- Overview of magnetic measurements
- Sensors
- Measurement reports
- Instruments
- Methods
- Fiducialization and alignment
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9:30 AM
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9:50 AM
Opening and Sirius Visit 20m
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9:50 AM
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12:10 PM
Plenary: Session 1
20 minutes per speaker, with 15 min for presentation and 5 min for questions
Convener: Marco Buzio (CERN)-
9:50 AM
Construction and measurement of a tuneable permanent magnet quadrupole for Diamond Light Source 20m
Permanent magnets (PMs) are becoming an attractive proposition as an environmentally friendly and efficient replacement for electromagnets in modern particle accelerators. In recent years the Zero-Power Tuneable Optics (ZEPTO) collaboration between STFC and CERN has demonstrated that traditional limitations of PM technology, such as the ability to change the field in the magnet aperture, can be overcome. This is achieved by moving PM blocks relative to fixed steel poles and yokes, allowing strength to be changed but keeping high field quality.
A new ZEPTO magnet has been developed in conjunction with Diamond Light Source (DLS) to demonstrate our technology on a real accelerator. This magnet features a number of crucial design innovations over previous ZEPTO magnets that greatly improve the convenience and versatility of PM systems and demonstrate that they can be deployed in a variety of situations.
This new magnet has now been built, measured and installed on DLS. We discuss here its measured performance relative to the design parameters and discuss the functionality of the new features with focus on the real-world implications of tuneable PM technology for current and future accelerators. We also discuss the challenges inherent in the construction and measurement of magnets of this nature.
Speaker: Dr Alex Bainbridge (STFC Daresbury Laboratory) -
10:10 AM
Magnet Section Activities at the Paul Scherrer Institute: Status and future challenges 20m
An overview of the magnet activities at the Paul Scherrer institute is presented. The talk will be mainly focused on the two running projects: the production of magnets for the SLS upgrade and the R&D performed in the framework of the CHART collaboration*. The challenges and the on-going development of these two projects since 2019 will be reviewed, with a special focus on the competence center and facility dedicated to insertion devices and conventional and superconducting magnets, as well as magnetic measurement techniques.
*Swiss Accelerator Technology- https://chart.ch/psi/
Speaker: Stephane Sanfilippo (Paul Scherrer Institut) -
10:30 AM
Performance of measurement systems for the Advanced Photon Source Upgrade storage ring magnets* 20m
A new magnetic measurement laboratory was constructed to measure the storage ring magnets for the Advanced Photon Source Upgrade. This facility has been in continuous operation since June 2019 and measurements are completed in about 1300 of the total 1355 magnets procured. The measurement systems include four rotating coil, two rotating wire and one Hall probe mapping bench. Measurements are completed on all benches, except two. One rotating coil and one rotating wire system are still in use to measure the last set of magnets which are still in production. All benches have functioned reliably with negligible down time. The performance of these measurement systems will be presented along with some illustrative results.
*Work supported by the US Department of Energy under contract DE-AC02-06CH11357Speaker: Animesh Jain (Argonne National Laboratory) -
10:50 AM
Pulsed wire magnetic field measurement system for in-vacuum undulator 20m
A pulsed-wire system has been set up and used to measure an in-vacuum undulator magnetic field at NSRRC. A copper zirconium wire has been selected. The pulse current is generated with an in-house power supply. A high-resolution and fast-feedback laser-photodiode system served to detect the displacement of the wire. Construction of an in-vacuum NdFeB-permanent-magnet undulator (period 22 mm, magnetic length 2 m) has been completed for Taiwan Photon Source. In this work, we applied a highly stiff, thin copper zirconium wire to diminish the maximum sag during measurement of a long undulator. We also demonstrate that the distance between the location of a wire dispersion sensor and a fixed point of the wire is an important issue to separate the main and weak reflection signals in pulsed-wire measurement. From the results of the undulator measurement, we obtained the magnetic field performed with the pulsed wire and Hall probe measurements, which are compared. The performance of magnetic fields is similar; the magnetic-field and pole-length errors peak to peak are both less than 1 %; the first and second integral fields are similar. The pulsed-wire system provides quick measurements of the magnetic field and is easy to install on any undulator.
Speaker: Dr Chih Wei Chen (National Synchrotron Radiation Research Center) -
11:10 AM
Improving the performance of a three-axes Hall probe mapper system 20m
Recently, a new three-axes Hall probe mapper system was commissioned at CERN. Its performance has been improved in several aspects, which we will be discussed in this presentation.
(1) A 3D calibration setup is presented. Two piezoelectric turntables are used to manipulate the orientation of an incident reference dipole field. This enables the calibration of planar and 3D Hall effects.
(2) A cone quadrupole magnet was built for the fiducialization of the sensor position. We exploit its high gradient field to calibrate the positions of the three Hall elements within the Hall cube.
(3) To improve the overall measurement duration, the mapper system is taking measurements on-the-fly while moving the stages. However, small imperfections in the stage motion cause vibrations in the mapper's arm, which are harmful to the sensor positioning. We have therefore derived a sensor noise model which includes the effect of mechanical vibrations, using the Euler-Bernoulli beam theory.
(4) Mapping only the boundary of a three-dimensional domain, we can reduce the number of mapper moves from O(1/h^2) to only O(1/h), where h is the measurement resolution. We present an approach to reconstructing the field in the enclosed domain by using a boundary element method.Speaker: Melvin Liebsch (CERN) -
11:30 AM
Separation of spatial and temporal components in rotating coil data analysis 20m
The use of Fast Fourier Transforms (FFTs) to determine field harmonics in rotating coil measurements has been a fixture in the analysis of these measurements since first employed in the mid 1900’s. Instead, by solving matrix-based equations which effectively perform a Fourier Transform while simultaneously including time-based terms, advantages over the simple FFT can be realized and may offer improvements in noise reduction and measurement techniques.
Speaker: Joseph DiMarco (Fermi National Accelerator Laboratory) -
11:50 AM
EMMA: A Framework for Constructing Magnetic Measurement Systems 20m
The Extensible Magnetic Measurement Application (EMMA) framework has been developed as a foundation for building a family of measurement systems based on the same architecture. The main goal was to provide flexibility and extensibility while maximizing software reuse. The framework supports a set of standardized software components collaborating over a software bus middleware. Typical programming-based development of measurement systems is replaced by assembling these systems from configurable components. These components acquire data, control measurement devices, and analyze, visualize, and archive data. Their work is coordinated by parametrized automation scripts. All components are asynchronous and can be distributed over multiple computers. EMMA offers great observability allowing for monitoring of measurement systems and rapid issue remediation. The quality of measurements can be assessed automatically by on-line quality control components. The system has been developed leveraging the relative strengths of the G, Python and MATLAB programming languages. So far, several measurement systems have been developed based on EMMA, including single stretched wire systems, a rotating coil system, and point scan and field mapping systems.
Speaker: Jerzy Nogiec (Fermi National Accelerator Laboratory)
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9:50 AM
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12:10 PM
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1:00 PM
Poster A: Group 1
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12:10 PM
Construction and measurement of a tuneable permanent magnet quadrupole for Diamond Light Source 50mSpeaker: Dr Alex Bainbridge (STFC Daresbury Laboratory)
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12:10 PM
EMMA: A Framework for Constructing Magnetic Measurement Systems 50mSpeaker: Jerzy Nogiec (Fermi National Accelerator Laboratory)
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12:10 PM
Improving the performance of a three-axes Hall probe mapper system 50mSpeaker: Melvin Liebsch (CERN)
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12:10 PM
Magnet Section Activities at the Paul Scherrer Institute: Status and future challenges 50mSpeaker: Stephane Sanfilippo (Paul Scherrer Institut)
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12:10 PM
Performance of measurement systems for the Advanced Photon Source Upgrade storage ring magnets* 50mSpeaker: Animesh Jain (Argonne National Laboratory)
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12:10 PM
Pulsed wire magnetic field measurement system for in-vacuum undulator 50mSpeaker: Dr Chih Wei Chen (National Synchrotron Radiation Research Center)
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12:10 PM
Separation of spatial and temporal components in rotating coil data analysis 50mSpeaker: Joseph DiMarco (Fermi National Accelerator Laboratory)
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12:10 PM
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9:30 AM
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9:50 AM
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9:00 AM
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9:50 AM
Poster B: Group 1
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9:00 AM
Construction and measurement of a tuneable permanent magnet quadrupole for Diamond Light Source 50mSpeaker: Dr Alex Bainbridge (STFC Daresbury Laboratory)
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9:00 AM
EMMA: A Framework for Constructing Magnetic Measurement Systems 50mSpeaker: Jerzy Nogiec (Fermi National Accelerator Laboratory)
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9:00 AM
Improving the performance of a three-axes Hall probe mapper system 50mSpeaker: Melvin Liebsch (CERN)
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9:00 AM
Magnet Section Activities at the Paul Scherrer Institute: Status and future challenges 50mSpeaker: Stephane Sanfilippo (Paul Scherrer Institut)
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9:00 AM
Performance of measurement systems for the Advanced Photon Source Upgrade storage ring magnets* 50mSpeaker: Animesh Jain (Argonne National Laboratory)
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9:00 AM
Pulsed wire magnetic field measurement system for in-vacuum undulator 50mSpeaker: Dr Chih Wei Chen (National Synchrotron Radiation Research Center)
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9:00 AM
Separation of spatial and temporal components in rotating coil data analysis 50mSpeaker: Joseph DiMarco (Fermi National Accelerator Laboratory)
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9:00 AM
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9:50 AM
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12:10 PM
Plenary: Session 2
20 minutes per speaker, with 15 min for presentation and 5 min for questions
Convener: Stephane Sanfilippo (Paul Scherrer Institut)-
9:50 AM
Design and Measurement of the Electromagnets and Permanent Magnets for the Upgrade of the Swiss Light Source (SLS2) 20m
One of the major projects at the Paul Scherrer Institute (PSI) for the next years is the upgrade of the Swiss Light Source (SLS2) in order to provide higher photon flux and brilliance for the beamline users. The new storage ring Multi Bend Achromat lattice aims at an improvement in emittance and an associated increase in brightness by a factor of forty compared to the current performance while maintaining the locations of the undulator based beam lines and the circumference of 287.25 m. This requires an extremely dense lattice arrangement with a total of 888 electromagnets and 450 permanent magnets. All four types of electromagnets and seven types of permanent magnets have been designed and will be measured at PSI until the end of 2023.
This contribution provides an overview of the design of the SLS2 magnets and presents the magnetic measurement systems dedicated for their characterization, before showing exemplary measurement results for the 70 A Electro-Quadrupole magnet series QS2A, QS2B, QS2F and QS2G measured with an 18 mm rotating coil measurement system.
Speakers: Carolin Zoller (PSI), Dr Giuseppe Montenero (PSI) -
10:10 AM
Sirius magnetic measurement systems 20m
Sirius is a 3GeV 4th generation synchrotron light source located in Brazil, where five beamlines are currently operating by using provisional planar IDs for comissioning. By the end of the first phase of beamline implementation, six undulators will be in operation, five comercial IDs and one in-house designed delta undulador, which is currently in construction. This poster will present the magnetic characterization instruments which are being used during the delta undulator prototype development and will be used to measure and validate the comercial IDs, as well as the IDs' surrounding magnetic components, namely the feedforward horizontal and vertical orbit correctors and skew quadrupoles. A Hall probe mapping bench, a streched wire system, a rotating coil bench and a Helmholtz coil will be presented as well as their use during the delta undulator development. Future plans for the magnetic characterization room will be briefly discussed.
Speaker: Vitor Soares (CNPEM) -
10:30 AM
Field measurement of a cryogenic permanent magnet undulator at TPS 20m
A PrFeB-based cryogenic permanent-magnet undulator (CPMU) with 15 mm period length (CU15) is being constructed to provide high brilliant X-rays for the Taiwan Photon Source (TPS) nano-probe scope beamline. Field measurements of this undulator will be performed with a Hall probe in vacuum environment. The in-situ Hall probe measurement system is improved to measure and tune the magnetic field of the CU15. A field strength and temperature dependent calibration of the Hall probe is done to obtain the real field distributions.
By tuning the differential adjusters and spring modules, we can correct the magnetic field errors causing by assembly repr-ducibility and temperature gradients along magnetic arrays, lowering the phase errors to reach our design goals. This paper describes details of improvements in the measurement system, field tuning methods, and measurement results at cryogenic temperature.Speaker: Chinkang Yang (NSRRC) -
10:50 AM
The Hall probe measurement system for the Advanced Photon Source Upgrade dipole magnets 20m
The Advanced Photon Source Upgrade longitudinal gradient dipole magnets have been characterized using a 4-axis motion control stage system with a 3-axis Hall probe to create 3D field maps. A model of the poles, average mid-plane, exterior fiducial points, and the definition of the magnet-frame was generated for each magnet using a pre-survey prior to measurements. The dipole magnets were installed on the adjacent support bench in a nominal position, that is mechanically decoupled from the Hall probe motion control stage system. The location of the magnet-frame was then surveyed relative to the motion control stage-frame. The positions and angles of the 3-axis Hall probe elements were calibrated in-situ in the magnet frame. The motion vectors of the Hall probe were transformed from the stage-frame to the magnet-frame, allowing the field and positional data to be expressed in the magnet frame. The details of the Hall probe measurement system, the stage-frame to magnet-frame and Hall probe transformations will be presented.
*Work supported by the US Department of Energy under contract DE-AC02-06CH11357Speaker: Charles Doose (Argonne National Laboratory) -
11:10 AM
Undulator Measurements At SLAC 20m
At SLAC we have tuned and calibrated more than 90 undulators for the LCLS and LCLS-II projects. The requirements for these FEL measurements are very tight. We are currently upgrading an undulator line and are preparing to measure 30 more undulators. The talk will be a summary of the techniques we use for the measurements.
Speaker: Zachary Wolf (SLAC) -
11:30 AM
Hysteresis Modeling in Iron-Dominated Magnets Based on a Multi-Layered NARX Neural Network Approach 20m
A full-fledged neural network modeling, based on a Multi-layered Nonlinear Autoregressive Exogenous Neural Network (NARX) architecture, is proposed for quasi-static and dynamic hysteresis loops, one of the most challenging topics for computational magnetism. This modeling approach overcomes drawbacks in attaining better than percent-level accuracy of classical and recent approaches for accelerator magnets, that combine hybridization of standard hysteretic models and neural network architectures. By means of an incremental procedure, different Deep Neural Network Architectures are selected, fine-tuned and tested in order to predict magnetic hysteresis in the context of electromagnets. Tests and results show that the proposed NARX architecture best fits the measured magnetic field behavior of a reference quadrupole at CERN. In particular, the proposed modeling framework leads to a percent error below 0.02% for the magnetic field prediction, thus outperforming state of the art approaches and paving a very promising way for future real time applications.
Speaker: Dr Vincenzo Di Capua (CERN) -
11:50 AM
Magnets and magnetic measurements for the new light source PETRA IV 20m
The proposed PETRA IV electron storage ring that will replace DESY´s flagship synchrotron light source PETRA III will feature a horizontal emittance as low as 20 pm-rad. It is based on a hybrid six-bend achromat lattice. In addition to the storage ring PETRA IV, the Booster Synchrotron DESY IV and the corresponding transfer line will be renewed. Overall about 4000 magnets will be manufactured. The lattice design requires high-gradient quadrupoles, sextupoles and octupoles. The bending magnets for the storage ring will be combined dipole-quadrupole permanent magnets. This contribution gives an overview of the project, the design and testing of the magnets. Characterizing this large number of magnets will require multiple test benches, together with optimized and automated test procedures. We present the magnetic measurement concept and the space proposed for the measurement facility.
Speakers: Matthias Thede (DESY), Mr Markus Tischer (DESY)
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9:50 AM
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12:10 PM
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1:00 PM
Poster A: Group 2
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12:10 PM
Design and Measurement of the Electromagnets and Permanent Magnets for the Upgrade of the Swiss Light Source (SLS2) 50mSpeakers: Carolin Zoller (PSI), Dr Giuseppe Montenero (PSI)
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12:10 PM
Field measurement of a cryogenic permanent magnet undulator at TPS 50mSpeaker: Chinkang Yang (NSRRC)
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12:10 PM
Hysteresis Modeling in Iron-Dominated Magnets Based on a Multi-Layered NARX Neural Network Approach 50mSpeaker: Dr Vincenzo Di Capua (CERN)
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12:10 PM
Magnets and magnetic measurements for the new light source PETRA IV 50mSpeakers: Matthias Thede (DESY), Mr Markus Tischer (DESY)
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12:10 PM
Sirius magnetic measurement systems 50mSpeaker: Vitor Soares (CNPEM)
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12:10 PM
The Hall probe measurement system for the Advanced Photon Source Upgrade dipole magnets 50mSpeaker: Charles Doose (Argonne National Laboratory)
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12:10 PM
Undulator Measurements At SLAC 50mSpeaker: Zachary Wolf (SLAC)
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12:10 PM
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9:00 AM
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9:50 AM
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9:00 AM
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9:50 AM
Poster B: Group 2
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9:00 AM
Design and Measurement of the Electromagnets and Permanent Magnets for the Upgrade of the Swiss Light Source (SLS2) 50mSpeakers: Carolin Zoller (PSI), Dr Giuseppe Montenero (PSI)
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9:00 AM
Field measurement of a cryogenic permanent magnet undulator at TPS 50mSpeaker: Chinkang Yang (NSRRC)
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9:00 AM
Hysteresis Modeling in Iron-Dominated Magnets Based on a Multi-Layered NARX Neural Network Approach 50mSpeaker: Dr Vincenzo Di Capua (CERN)
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9:00 AM
Magnets and magnetic measurements for the new light source PETRA IV 50mSpeakers: Matthias Thede (DESY), Mr Markus Tischer (DESY)
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9:00 AM
Sirius magnetic measurement systems 50mSpeaker: Vitor Soares (CNPEM)
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9:00 AM
The Hall probe measurement system for the Advanced Photon Source Upgrade dipole magnets 50mSpeaker: Charles Doose (Argonne National Laboratory)
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9:00 AM
Undulator Measurements At SLAC 50mSpeaker: Zachary Wolf (SLAC)
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9:00 AM
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9:50 AM
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12:10 PM
Plenary: Session 3
20 minutes per speaker, with 15 min for presentation and 5 min for questions
Convener: Animesh Jain (Argonne National Laboratory)-
9:50 AM
Magnetic measurement of 4.3T conduction-cooled HEX superconducting wiggler. 20m
The High energy Engineering X-ray (HEX) Diffraction beamline at the National Synchrotron Light Source II (NSLS-II) at Brookhaven National Lab (BNL) is the first high-energy beamline which reaches up to 150keV for monochromatic beam. The 1.2m long HEX-SCW has been developed with Bilfinger Noell with a period length of 70 mm and field strength on-axis of 4.3 T with vacuum aperture of 8mm. Magnetic measurement of the SCW is conducted using a novel in-vacuum Hall mapper and an in-vacuum flip coil system at BNL. The in-vacuum Magnetic Measurement System (IVMMS) which was originally developed for 1.5m-long CPMUs has been repurposed to obtain 1.9 m measurement stroke. Three Lakeshore probes and a Cernox® sensor are placed in a sled made of Vespel®. The in-vacuum flip coil system is constructed with COTS components by UHV Design. System descriptions and measurement results are presented.
Speaker: Toshi Tanabe (BNL) -
10:10 AM
The status of Insertion Devices magnetic field measurement at HEPS 20m
HEPS is a new 6 GeV synchrotron radiation light source. Insertion devices play a significant role in achieving the high performance of the photons. There are 6 types of 19 insertion devices in total. Among the 19 insertion devices, there are IAU, Wiggler，CPMU, IVU ,AK and Mango. The presentation describes the status of the magnetic field measurement for insertion devices. A new magnetic measurement laboratory is just setup for the measurements and fiducialization of insertion devices. The in-situ magnetic field measurement system for CMPU has been developed and has been used in HEPS CPMU measurement. The new in vacuum in-situ magnetic field measurement system for 4 meters long IVU is under development.
Speaker: Ms Wan Chen (IHEP) -
10:30 AM
Overview of Magnetic Measurement Activities at Fermilab 20m
An overview of recent and future measurements, systems, and facilities at Fermilab for magnetic measurements. Primarily focused on the efforts toward measurements of magnets being built by the US collaboration for the HiLumi Accelerator Upgrade Project at CERN, measurements of Proton Power Upgrade magnets being built for ORNL, and quadrupole/sextupole probes built for the NSLSIIu at BNL.
Speaker: Joseph DiMarco (Fermi National Accelerator Laboratory) -
10:50 AM
WMM Testbench for MCBXF Series Production 20m
The series production of the CIEMAT´s MCBXF nested dipole orbit corrector is being carried out in the Spanish industry, specifically at Elytt Energy premises. The overall process of the MCBXF assembly consists of three clearly differentiated steps, i.e. Inner dipole assembly, outer dipole assembly and complete magnet assembly. After the completion of each stage it is necessary to perform a control by measuring the magnetic field quality at room temperature. This is a series production follow-up work necessary to ensure the conformity of the assembled parts before proceeding to subsequent steps that are difficult to reverse. To this purpose, a warm magnetic measurement bench was designed by CIEMAT and CERN and manufactured at CERN prior to its shipment to the indutry presmises. Its control and data acquisition software was developed using the Fast Framework for Magnetic Measurements (FFMM) developed at CERN. Its post-processing software offers the possibility of analyzing the data in different reference systems. This functionality is particularly valuable for the MCBXF magnet since it consists of two nested dipoles arranged in orthogonal reference systems with respect to each other. We present here its design and main functionalities.
Speaker: Luis Antonio González Gómez (CIEMAT) -
11:10 AM
Encoder-less rotating-coil acquisition 20m
In the conventional rotating-coil measurements the flux linkage intercepted by the induction coils is obtained by integrating the voltage signal between encoder triggers of two angular positions, consequently reducing the influence of the speed variation.
In this talk, a rotating-coil measurement method is proposed that does not employ an angular encoder. Instead, it is based on reconstructing the rotation speed and the angular positions relying on the coil voltage signals. The field quality error of the 10-4 range for particle accelerator magnets allows the primary coil signal to be considered a pure sine function for speed variation correction.
A feasibility study and a metrological characterization of a developed test system is presented, followed by the proposals for possible future coil and system designs.
Speaker: Piotr Rogacki (CERN) -
11:30 AM
Influence of a tip’s magnetic configuration on domain structures during magnetic force microscopy measurements 20m
Magnetic force microscopy (MFM) is a variant of the atomic force microscope that allows the imaging of magnetic properties at a nanoscale. The measurement system consists of a cantilever with a mounted magnetic tip that gets deflected when it interacts with the sample through the van der Waals and magnetic forces during the scanning, allowing the visualization of the topography and magnetic domain structures on the surface of the sample. MFM measurements are qualitative due to the complex magnetization of the tip and the tip-sample interactions that can affect both parties involved. Therefore, properties like having the smallest and most spatially confined magnetic field possible are necessary to attenuate undesired influences on the magnetic structures under analysis. In order to achieve that, a tip demagnetization protocol was developed. Different magnetization configurations of the MFM tip were achieved by applying varying magnetic fields prior to each measurement. The influence of the magnetic configuration of the tip was tested in Co/Pd multilayers presenting perpendicular magnetic anisotropy.
Speaker: Heloísa Suffert Acosta -
11:50 AM
A stretched wire tomography system at Kyma 20m
Magnetic measurements of single magnets are essential to making a high-quality insertion device. Kyma R&D lab is constantly working on improving these measurements and looking for new ways of extracting information that could be used for further optimizations of the insertion device manufacturing process.
R&D lab at ESRF successfully demonstrated that the signal measured from a stretched wire system is analogous to the absorption signal of the x-rays used in tomography and can be used to reconstruct 2D magnetic field maps. Following success of the ESRF demonstrator. Kyma lab build a similar system, consisting of a dedicated stretched wire bench, a rotary stage and a Keithley Nanovolt meter. System is controlled by a Raspberry Pi 4 single board computer. Python is used both for motion control/data acquisition and data analysis. Here we present design of the system, principles of operation, first results and possible future usage of the system.
Speakers: Mirko Kokole (Kyma Tehnologija d.o.o.), MIRKO KOKOLE (KYMA S.P.A.)
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9:50 AM
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12:10 PM
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1:00 PM
Poster A: Group 3
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12:10 PM
A stretched wire tomography system at Kyma 50mSpeakers: Mirko Kokole (Kyma Tehnologija d.o.o.), MIRKO KOKOLE (KYMA S.P.A.)
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12:10 PM
Encoder-less rotating-coil acquisition 50mSpeaker: Piotr Rogacki (CERN)
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12:10 PM
Influence of a tip’s magnetic configuration on domain structures during magnetic force microscopy measurements 50mSpeaker: Heloísa Suffert Acosta
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12:10 PM
Magnetic measurement of 4.3T conduction-cooled HEX superconducting wiggler. 50mSpeaker: Toshi Tanabe (BNL)
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12:10 PM
Overview of Magnetic Measurement Activities at Fermilab 50mSpeaker: Joseph DiMarco (Fermi National Accelerator Laboratory)
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12:10 PM
The status of Insertion Devices magnetic field measurement at HEPS 50mSpeaker: Ms Wan Chen (IHEP)
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12:10 PM
WMM Testbench for MCBXF Series Production 50mSpeaker: Luis Antonio González Gómez (CIEMAT)
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12:10 PM
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9:00 AM
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9:50 AM
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9:00 AM
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9:50 AM
Poster B: Group 3
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9:00 AM
A stretched wire tomography system at Kyma 50mSpeakers: Mirko Kokole (Kyma Tehnologija d.o.o.), MIRKO KOKOLE (KYMA S.P.A.)
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9:00 AM
Encoder-less rotating-coil acquisition 50mSpeaker: Piotr Rogacki (CERN)
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9:00 AM
Influence of a tip’s magnetic configuration on domain structures during magnetic force microscopy measurements 50mSpeaker: Heloísa Suffert Acosta
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9:00 AM
Magnetic measurement of 4.3T conduction-cooled HEX superconducting wiggler. 50mSpeaker: Toshi Tanabe (BNL)
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9:00 AM
Overview of Magnetic Measurement Activities at Fermilab 50mSpeaker: Joseph DiMarco (Fermi National Accelerator Laboratory)
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9:00 AM
The status of Insertion Devices magnetic field measurement at HEPS 50mSpeaker: Ms Wan Chen (IHEP)
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9:00 AM
WMM Testbench for MCBXF Series Production 50mSpeaker: Luis Antonio González Gómez (CIEMAT)
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9:00 AM
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9:50 AM
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12:10 PM
Plenary: Session 4
20 minutes per speaker, with 15 min for presentation and 5 min for questions
Convener: Ed Rial (Helmholtz-Zentrum Berlin)-
9:50 AM
A Static-Sample Magnetometer for Characterizing Weak Magnetic Materials 20m
In this talk, a new measurement method called static-sample magnetometry (SSM), is presented, with the aim of measuring the magnetic properties of feebly magnetic materials. The method is based on the flux-distortion detection principle, was realized with instrumentation already available in-house, and achieves a relative permeability resolution of 10^{-5}, comparable with the vibrating sample magnetometry (VSM), the state-of-the-art solution. The uncertainty was evaluated by Monte Carlo simulations, and is in the order of 10^{-4}. Three case studies are presented to highlight the performance of the method, capable of working with specimens having various shapes and dimensions.
Speaker: Mariano Pentella (CERN) -
10:10 AM
Measuring and compensating method of guide rail straightness of a Hall probe measurement facility for in-vacuum undulator 20m
IHEP is building the cryogenic permanent magnet undulator and in-vacuum undulator for High Energy Photon Source. The in-vacuum Hall probe measurement facility is the necessary tool for tuning the undulator. However, in the narrow and closed vacuum environment, the rail straightness of Hall probe measurement facility is difficult to guarantee. A position sensitive detector is used to measure the guide rail straightness error and a piezoelectric ceramic motor is used to compensate the error. In this paper, the guide rail straightness error measurement and compensation method of guide rail are introduced.
Speakers: lingling gong (IHEP), wan chen (IHEP) -
10:30 AM
Conceptual design of multi-stretched wire magnetic measurement bench 20m
Single stretch wire (SSW) bench is popularly used for characterization of multipole accelerators magnets. This bench is highly versatile and is used for measurement of key performance indicators like integral strength, roll angle, magnetic axis, higher order multipoles, yaw and pitch. Single stretch wire bench developed at BARC have been put to use for qualification of more than 100 quadrupole and dipole correctors magnets. The biggest shortcoming of SSW when compared to rotating coil is low signal to noise ratio which is due to usage of single wire for magnetic flux measurement. This paper presents the concept of using multiple stretched wire, connected in series to enhance the signal versus noise. The proposed bench uses enamelled BeCu wire and separate pair of stiffener motor arrangement for each wire. The exact location of each wire with respect to other wires can be measured using the magnetic axis determination sub-routine of the SSW. This data helps in determination of average wire location. All wires are tuned to same resonant frequency. During measurements the wires are connected in series and connected to the fast digital integrators. The paper will detail the design backed with EM simulations and lab trials.
Speaker: Vikas Teotia (Bhabha Atomic Research Centre) -
10:50 AM
Measurement benches for Magnetic Qualifications of bending magnet 20m
Bending magnets finds numerous applications in particle accelerators, mass spectrometers and electromagnetic isotope separators among others. BARC has designed, developed and installed bending magnets for beam transport line, mass spectrometers and mass separators. The key performance indicators for bending magnets are bending angle and magnetic field homogeneity. BARC has developed magnetic measurement systems for qualification of these magnets, based on Hall probe and planar coils. Hall probe-based system consists of X-Y-R-theta-Z motion stage; laser tracker and Group3 Hall probes. Laser tracker is used to measure the axis of beam bending to which the rotary axis of the motion stage is aligned using X-Y stage. The Hall probe mounted on an arm, scan along the R-theta plane at different Z axis points and magnetic field is recorded for pre-decided theta steps. Post processing of the data results in bending angle and magnetic field homogeneity. This approach is not suitable for H-type bending magnet for which planar coils are designed and used for measurement of bending angle. Coupled with fast digital integrator and Hall probe at median plane, simple calculations yields bending angle. The paper will discuss these systems which have been put to use for characterization of many bending magnets.
Speaker: Vikas Teotia (Bhabha Atomic Research Centre) -
11:10 AM
Magnet section activities at ALBA 20m
In this contribution we will describe the activities of the Insertion Devices and magnetic measurements group at ALBA since 2019 and the plans for the future. ALBA is taking the first steps towards a complete renewal of its main accelerator in order to decrease its electron beam emittance by a factor 30. The current plan is that the upgraded facility, that will be named ALBA II, will start user operation around 2031. ID group has been given the responsibility of designing, procuring and characterizing the magnets for the new accelerator. In order to face this challenge the group has undergone a complete reorganization, including the recruiting of new members. The structure of the renewed group and the strategy for the following years will be presented, including the foreseen update of the magnetic measurements laboratory.
Concerning magnetic measurement activities, Covid19 pandemics has had a very strong impact on the volume of work for external companies and institutions. However, we will report on the characterization that we have carried out for CIEMAT of a permanent magnet-based dipole with longitudinal and transversal gradients, where we have combined Hall probe field mapping and an eccentric flipping coil for the determination of field harmonics.Speaker: Jordi Marcos Ruzafa (ALBA Synchrotron) -
11:30 AM
Digital Magnetic Resonance Spectrometer (DMRS) from CIERMag: calibration and measurements methodology 20m
Nuclear Magnetic Resonance (NMR) techniques have been evolving, and are present in various sectors of society such as medicine, industry and agriculture. However, according to a review by Centro de Imagens e Espectroscopia por Ressonância Magnética (CIERMag), although they are practical to use in most applications, current NMR commercial equipment are restricted for modifications, and do not allow new pulse sequences, or pulse shapes - i.e adiabatic pulses - to be introduced in an easy way. In an attempt to solve these problems, the project ToRM-15 (Magnetic Resonance Tomography 1.5T) began to be developed. It allows the creation of a Digital Magnetic Resonance Spectrometer (DMRS) based on reconfigurable hardware powered by Field-Programmable Gate Array (FPGA). CIERMag has also developed software that allows the experiment planning and control, based on the Python Magnetic Resonance Framework (PyMR), and that uses the proprietary F - Language to develop pulse sequences. In this study NMR Methods for DMRS calibration such as: spectrometer resonance frequency adjustment, receiver gain adjustment, and the flip angle calibration were developed. Besides that, the pure water T2 value was measured using CPMG and is in accordance with the literature T2 = 2.045 seconds.
Speaker: Julia Marcolan (Universidade de São Paulo (USP)) -
11:50 AM
Magnetic measurement activities at CERN 20m
A summary of activities related to magnetic field testing at CERN in the last three years, including major ongoing projects such as the High Luminosity LHC upgrade; progress of infrastructure, test equipment and measurement methods R&D; prototyping and preparations for future projects.
Speaker: Marco Buzio (CERN)
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1:00 PM
Poster A: Group 4
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12:10 PM
A Static-Sample Magnetometer for Characterizing Weak Magnetic Materials 50mSpeaker: Mariano Pentella (CERN)
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12:10 PM
Conceptual design of multi-stretched wire magnetic measurement bench 50mSpeaker: Vikas Teotia (Bhabha Atomic Research Centre)
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12:10 PM
Magnet section activities at ALBA 50mSpeaker: Jordi Marcos Ruzafa (ALBA Synchrotron)
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12:10 PM
Magnetic measurement activities at CERN 50mSpeaker: Marco Buzio (CERN)
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12:10 PM
Measurement benches for Magnetic Qualifications of bending magnet 50mSpeaker: Vikas Teotia (Bhabha Atomic Research Centre)
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12:10 PM
Measuring and compensating method of guide rail straightness of a Hall probe measurement facility for in-vacuum undulator 50mSpeakers: lingling gong (IHEP), wan chen (IHEP)
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Poster B: Group 4
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9:00 AM
A Static-Sample Magnetometer for Characterizing Weak Magnetic Materials 50mSpeaker: Mariano Pentella (CERN)
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9:00 AM
Conceptual design of multi-stretched wire magnetic measurement bench 50mSpeaker: Vikas Teotia (Bhabha Atomic Research Centre)
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9:00 AM
Magnet section activities at ALBA 50mSpeaker: Jordi Marcos Ruzafa (ALBA Synchrotron)
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9:00 AM
Magnetic measurement activities at CERN 50mSpeaker: Marco Buzio (CERN)
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9:00 AM
Measurement benches for Magnetic Qualifications of bending magnet 50mSpeaker: Vikas Teotia (Bhabha Atomic Research Centre)
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9:00 AM
Measuring and compensating method of guide rail straightness of a Hall probe measurement facility for in-vacuum undulator 50mSpeakers: lingling gong (IHEP), wan chen (IHEP)
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9:00 AM
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12:10 PM
Plenary: Session 5
20 minutes per speaker, with 15 min for presentation and 5 min for questions
Convener: Regis Neuenschwander (CNPEM)-
9:50 AM
Measurement activities and upgrades at HZB 20m
We will report on the recent and planned upgrades for the magnetic measurement facilities of the undulator group at HZB, and on the latest measurement campaigns undertaken in Berlin.
Speaker: Ed Rial (Helmholtz-Zentrum Berlin) -
10:10 AM
A comparative study from magnetic measurements between lanthanum manganites and lanthanum manganites doped with strontium 20m
Strontium-doped lanthanum manganites (LSMO) are well known in the literature for having 100% spin polarization, which can be used for spintronic applications. Several works about the synthesis and structural and morphological characterization have already been published about this material. However, these characterizations solely are not enough to determine that the synthesized material is LSMO, requiring a magnetic report. In this work, the magnetometer was used to characterize lanthanum manganite particles treated with little and over-stoichiometry oxygen and LSMO. These results were analyzed and compared with the literature in order to show that the excess of oxygen in the lanthanum manganite produces an effect similar to that of the strontium atom in the A site of the LSMO, leading to misinterpretations of the synthesized material.
Speaker: Weslley Lourenco (UFRJ) -
10:30 AM
Accurate alignment of stretched-wire system in single magnet block and undulator 20m
19 undulators of High Energy Photon Source (HEPS) in Beijing will be installed to deliver high-performance X-ray.Since the magnet sorting is a standard step in the undulator fabrication procedure,thousands of magnet block have been precise measured by stretched-wire system which has high efficiency and repeatability.Fiducialization and alignment of stretched-wire system are important to achieve high accuracy and consistency,the methods of accurate alignment will be presented in report.Reverse and flip of single magnet block will be measured,the results are used to calculate the exact position.After magnetic measurement,The measurement results will be compared with sorting results.In the end,the alignment of stretched-wire system in undulators will be described,the shim methods can help achieve more accurate magnetic center positioning.
Speakers: Dr Zhiqiang Li (IHEP), Prof. Wan Chen (IHEP) -
10:50 AM
Magnet Measurements of the ALS-U Magnets 20m
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 of the magnet measurement systems used for the magnetic measurements of the ALS-U magnets and it also reports about the present status of progress.
Speaker: Dr Erik Wallen (Lawrence Berkeley National Laboratory) -
11:10 AM
Magnetic Measurements at Diamond Light Source 20m
Diamond Light Source is currently upgrading beamlines with new Cryogenic Permanent Magnet Undulators (CPMUs). To date we have installed 4 CPMUs. We present recent upgrades and developments with the measurement benches used to measure these devices including a brief overview of results. We also present initial gradient dipole magnet measurement results for Diamond-II.
Speaker: Zena Patel (Diamond Light Source Ltd) -
11:30 AM
Refinement of Hall Sensor Calibration with Long Coil for Undulator Measurement 20m
Hall sensors are used to measure magnetic field profiles of undulators for synchrotron radiation sources. They are typically calibrated with a standard dipole magnet and a Nuclear Magnetic Resonance (NMR) Teslameter to obtain the magnetic field to voltage relationshipDue to the alternating nature of the magnetic field profile in an undulator a small error might result in a significant change in the measured field integrals. This would lead to inaccurate trajectories which is especially detrimental for multi-undulator applications such as FELs or in-line undulator configurations in storage rings. To overcome this issue, we developed a technique by using undulator gap-dependent magnetic field measurements with both the Hall sensor and a long coil field integral measurement system to derive refined corrections to the Hall probe calibration file. We describe the technique in detail and report on results of several in-line undulator measurements performed at the Advanced Photon Source.
Speaker: Maofei Qian (anl) -
11:50 AM
Ongoing Developments of Magnetic Measurement Equipment for Undulators at DESY 20m
In course of the present upgrade programs for the FLASH FEL and the PETRA synchrotron radiation light source, we pursue developments of new undulator sources, which require dedicated new magnetic measurement equipment.
For the characterization of future cryogenic permanent magnet undulators, a SAFALI-like in-situ measurement bench is currently being developed; it shall comprise a cryo- and vacuum-compatible Hall-probe and stretched wire bench. Besides, several smaller measurement stands are presently constructed or upgraded also in terms of the electronic data acquisition chain in order to provide the necessary tools for measurement and tuning of APPLE-III undulators for FLASH and permanent magnets for PETRA-IV. In particular, the previous good experience with efficient low-noise ADCs will be extended for these applications.
The poster summarizes the present status of the different ongoing developments.Speakers: Andreas Schöps (Deutsches Elektronen-Synchrotron DESY), Markus Tischer (DESY), Pavel Vagin (DESY)
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Final remarks and Next Edition Announcement 20m
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12:30 PM
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Poster A: Group 5
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12:30 PM
A comparative study from magnetic measurements between lanthanum manganites and lanthanum manganites doped with strontium 30mSpeaker: Weslley Lourenco (UFRJ)
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12:30 PM
Accurate alignment of stretched-wire system in single magnet block and undulator 30mSpeakers: Dr Zhiqiang Li (IHEP), Prof. Wan Chen (IHEP)
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12:30 PM
Magnet Measurements of the ALS-U Magnets 30mSpeaker: Dr Erik Wallen (Lawrence Berkeley National Laboratory)
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12:30 PM
Magnetic Measurements at Diamond Light Source 30mSpeaker: Zena Patel (Diamond Light Source Ltd)
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12:30 PM
Measurement activities and upgrades at HZB 30mSpeaker: Ed Rial (Helmholtz-Zentrum Berlin)
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12:30 PM
Ongoing Developments of Magnetic Measurement Equipment for Undulators at DESY 30mSpeakers: Andreas Schöps (Deutsches Elektronen-Synchrotron DESY), Markus Tischer (DESY), Pavel Vagin (DESY)
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Refinement of Hall Sensor Calibration with Long Coil for Undulator Measurement 30mSpeaker: Maofei Qian (anl)
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