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Dr Joseph DiMarco (Fermi National Accelerator Laboratory)SoftwareA new software system to test accelerator magnets has been developed at Fermilab which employs a flexible component-based framework and allows for easy reconfiguration and run-time modification. Various user interface, data acquisition, analysis, and data persistence components can be configured to form different measurement systems that are tailored to specific requirements. These can...Go to contribution page
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Mr Alessandro Masi (CERN)MeasuresDecay and snapback measurements for the b3 and b5 field harmonics are very important to model the magnet’s behaviour during beam injection and initial acceleration of the particles. Snapback occurs very quickly and the rotating coils are not fast enough to provide enough data and hence enable proper modeling of the phenomenon. Therefore to resolve the snapback evolution in time...Go to contribution page
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Alexander Temnykh (Cornell University)MeasuresInteraction region of Cornell Electron Storage Ring (CESR) electron-positron collider consists of two permanent and four superconducting quadrupole magnets. During summer shutdown of 2003 all these magnets were realigned using vibrating wire (VW) technique. In situ we measured magnetic center position of the magnets analyzing standing waves excited by Lorentz forces on the wire...Go to contribution page
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Dr Cristina Knapic (Sincrotrone Trieste S.C.p.A.)DevicesA permanent magnet Apple II type undulator was built at Elettra and a block sorting process was done in order to minimize the effects of magnetic errors on trajectories and angles of the electron beam. To check and optimize these corrections, Stretched Wire and Hall Plate measurements were performed. While the Stretched Wire system provides a clean measurement of field integrals, the...Go to contribution page
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Dr Alexander Temnykh (Cornell University)MeasuresThere will be described application of vibrating wire technique for the solenoid magnet magnetic center finding. Theory, measurement setup as well as the measurement result and achieved precision in comparison with theoretical prediction will be presented.Go to contribution page
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Prof. Juan Garcia Perez (CERN)Devices
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Dr Felix Bergsma (CERN)DevicesProgress on the 3D calibration of Hall sensors. Calibration of a large number of 3D sensors with an automated set-up. Comparison with absolute measurements. Results from users. A calibrator build for a 13 Tesla solenoid at GHMFL, Grenoble and first results at 4.5 Tesla. A new high precision 3D B-sensor of high simplicity using discreet Hall sensors.Go to contribution page
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Mr Olaf Dunkel (CERN)DevicesThe manufacture and magnetic measurement activity of the superconducting magnets for LHC has now achieved its peak. Precise magnetic measurements of various types must be performed on hundreds of dipole and quadrupole magnets on the warm and cold test stands at CERN but also during the manufacturing process in the member states’ industry as a quality control. A wide range of...Go to contribution page
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Mr Christian Giloux (CERN)MeasuresThe CERN-built warm industry benches for series testing of the module corrector magnets for the LHC, measure the field quality and the position and orientation of the magnetic field, relative to the mechanical construction. Both proprieties are required for an effective use of the magnets. The field position relative to the mechanical reference frame is defined by 3 parameters: the...Go to contribution page
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Prof. Leopoldo Angrisani (University of Naples "Federico II")MeasuresAt CERN, varying magnetic field measurements involve massive use of rotating coils systems. Standard procedure for estimating magnetic harmonic coefficients provides for the fast Fourier transform (FFT) of the magnetic flux, acquired over one complete coil turn and assumed to be stationary. The assumption certainly holds for magnets measured along the loadline, i.e. through a powering...Go to contribution page
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Prof. Pasquale Arpaia (Università del Sannio)MeasuresMagnetism and magnetic materials constitute a fascinating and challenging subject of investigation, playing a role in several branches of science and technology, as well as in advanced accelerators for subnuclear basic research. The theoretical description of ferromagnetic hysteresis and its rooting in the involved physical mechanisms exhibit several fundamental interpretative aspects,...Go to contribution page
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Mr Guy Deferne (CERN)MeasuresThree Single Stretched Wire systems are used at CERN to measure the axis, roll angle and integrated gradient (Gdl) of LHC main quadrupoles as well as the axis and roll angle of associated correctors. A statistical qualification of the systems based on the results of more than 40 SSS measured both at warm and cold conditions will be presented. In particular we will describe in...Go to contribution page
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Mr Hubert Reymond (CERN)SoftwareIn the framework of the measurement applications that have been developed for the LHC superconducting magnets quality analysis, a new level has been reached in the measurements and tests automation. The CERN SM18 test benches facility is dedicated to the reception tests and magnetic characterization of the dipoles, SSS’s and special SSS’s. During the last four years the electronic and...Go to contribution page
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Dr Laurent Deniau (CERN)Software
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Dr George Velev (FNAL)DevicesIn order to study dynamic effects in accelerator magnets, such as the decay of the magnetic field during the dwell at injection and the rapid so-called “snapback” during the first few seconds of the resumption of the energy ramp, a fast continuous harmonics measurement system was required. A new magnetic field measurement system, based on the use of digital signal processors (DSP) and...Go to contribution page
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Dr Olivier Marcouillé (Synchrotron SOLEIL)DevicesOne electromagnetic undulator (HU640)has been constructed to cover the VUV spectral range of the SOLEIL synchrotron. HU640 has been especially designed to produce polarized photons 5 eV -40 eV. It is composed of 16 periods of 640 mm generating up to 0.1 T in both transverse direction Bx and Bz. The field is produce by three sets of pure coils installed in a special arrangement. One set...Go to contribution page
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Mr Douglas Evans (Triumf)MeasuresThe radioactive isotope program at Triumf is expanding with the development of the new ISAC-2 project. The first transfer line from ISAC-1 to ISAC-2 is the S-Bend line which includes 16 quadrupole magnets and 4 high field conventional dipole magnets. This is a small bore line which created some challenges for magnet mapping. Mapping techniques and results will be discussed.Go to contribution page
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Mr Yurii Levashov (SLAC, Stanford)MeasuresFiducialization of LCLS undulators is based on magnetic field measurements by Hall probe. In this paper we discuss the fiducialization procedure, method and accuracy of coordinate transfer from center of the Hall probe sensitive area to the undulator fiducial marks. Pointed magnets or "magnetic needles", proposed by Isaak Vasserman[1], are used as an intermediate reference. A prototype...Go to contribution page
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Mr Joseph DiMarco (Fermi National Accelerator Laboratory)MeasuresFinal alignment measurements of the LHC low-beta quadrupoles are performed at Fermilab, both for magnets fabricated in-house, and for cold-masses supplied by KEK and subsequently cryostatted at FNAL before shipment to CERN. This talk reviews the various measurements performed during production and during room-temperature and cryogenic magnet testing. Results of determining the 6-axis...Go to contribution page
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Mr Christophe Penel (ESRF)DevicesAt the ESRF, a number of new measuring systems for Insertion Devices have been constructed over the past three years. These include field integral benches (flip coil), scanning hall probe benches and a dedicated system for permanent magnet block characterization. These new benches are based on more performant motion systems that are commercially available. A significant effort was put...Go to contribution page
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Didier Cornuet (CERN)DevicesThe CNAO (Centro Nazionale di Adroterpia Oncologica) project consists in an Italian accelerator for hadron therapy. The machine requires for the 16 bending magnets an homogeneity field of very high quality over a wide dynamic range. The collaboration between CERN and CNAO has developped a magnetic measurement bench based on an array of 12 curved long coils which is described. The 12...Go to contribution page
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Pierre Schnizer (Gesellschaft fuer Schwerionenforschung mbH (GSI))Devices2000 magnets of various types will be constructed for the FAIR project at GSI. All these magnets have to be measured to ensure proper operation of the machines. The small number of magnet in each series renders the construction of an unique device for each inadequate. This talk will list the various magent types needed for FAIR and discuss the selected magnetic...Go to contribution page
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Zack Wolf (SLAC)DevicesOur next large project at SLAC is an x-ray free electron laser. The magnetic measurements for this project require building a new laboratory. The laboratory under construction and a few other projects will be discussed.Go to contribution page
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Mr Arnaud MADUR (SOLEIL)MeasuresSOLEIL Synchrotron is a set of 3 electron accelerators (LINAC, Booster and Storage Ring).The 354m circumference storage ring is dedicated to synchrotron radiation for fundamental and applied physics research.The most sensitive components of the Storage Ring are quadrupoles therefore manufacturing requirements are very strict: 5.10^{-4} of the gradient for magnetic field harmonics, +/-25...Go to contribution page
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Dr Animesh Jain (Brookhaven National Laboratory, USA)DevicesField quality in accelerator magnets is expressed in terms of harmonic coefficients in a Fourier series, which are typically measured under DC conditions using a rotating coil. The technique of rotating coils has also been extended to measurements under AC conditions, but only for relatively slow ramps (well below 0.1 T/s). Currently, there is no well established technique for...Go to contribution page
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Mr Regis Chritin (CERN)MeasuresIn the context of the PS machine used as one of the injector for the LHC, it is important to know the magnetic field quality of the main combined function dipoles under the new LHC currents. A series of field maps have been undertaken using a new magnetic measurement stand with Hall probes. The variation of the Eddy current along the magnet is evaluated. Magnetic shims identical to the...Go to contribution page
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Mr Jacques-Maurice Dutour (CERN)MeasuresFor the cleaning insertions(IR3 and IR7)of the LHC,48 warm quadrupoles type MQW have to be installed.Those double aperture magnets have been measured according two types of configurations(DF and FF).Due to the large dynamic range of the magnet currents between injection and ejection,the characteristics at injection are very sensitive to the demagnetization cycles.The problems...Go to contribution page
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Mr Alessandro Masi (CERN)DevicesRotating coils is the method preferred in the measurement of field and field quality for accelerator magnets. One of the fundamental points of this instrument is represented by the digital integrators. These perform the integration of the pickup coils voltage in the angular domain, i.e according the triggers provided by an angular encoder. The resolution of the integration process can...Go to contribution page
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Dr Rolf Spreiter (Bruker Biospin)Special talks
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Mr Arnaud Madur (Sunchroton)Devices
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Mr Joseph DiMarco (Fermi National Accelerator Laboratory)DevicesMany diverse types of magnetic devices requiring measurements under various conditions are seen by the Fermilab Magnet Test Facility. This talk reviews some of the more demanding and unusual measurements that we have recently had to work on, and the techniques we have used to meet these requests. Among the measurements discussed are curved magnets, pulsed magnet measurements at 20MA/s,...Go to contribution page
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Mr Louis Walckiers (CERN)Devices
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Prof. Juan Garcia Perez (CERN)MeasuresThe LHC will be composed of 1232 horizontally curved, 15 meter long, superconducting dipole assemblies and 474 Short Straight Sections containing various types of quadrupoles. These magnets are manufactured by several European companies and half of them are currently produced. The field quality at room temperature is strictly monitored to guide and validate the assembly at different...Go to contribution page
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Mr Marco Buzio (CERN)Devices
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Dr Yoshihisa Iwashita (Kyoto University)DevicesHarmonic field measurement system with tangential coil is under fabrication. It will be used to measure a quadrupole magnet and a sextupole magnet. The system will be described.Go to contribution page
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Dr J. G. Wang (ORNL)DevicesThe Spallation Neutron Source (SNS) project is close to its completion. More than 600 magnets have been measured and installed in its accelerator. Among them, 416 magnets for the linac and transfer lines have been tested on site at Oak Ridge National Laboratory; all the magnets for the SNS linac are in operation. These magnets include various magnetic dipoles, quadrupoles, and...Go to contribution page
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Dr Cathy Folley (Csiro)Special talks
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Maryline Gateau (CERN)MeasuresFor the total of the 1706 LHC superconducting magnets, between 10 to 20 % of dipoles, SSS’s and special SSS’s will be magnetically measured at cold. This small fraction of magnets is sufficient as the warm/cold correlation has been established and is controlled through the production process. In order to verify the warm/cold correlation with required precision, the field quality...Go to contribution page
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Animesh Jain (Brookhaven National Laboratory)Summary & Guided discussion
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Dr Laurent Deniau (CERN)Summary & Guided discussion
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Prof. John Clarke (University of California, Berkeley, and Lawrence Berkeley National Laboratory)Special talksThe SQUID (Superconducting QUantum Interference Device) – a superconducting loop containing two Josephson junctions – is an ultrasensitive detector of magnetic flux. The principles, fabrication, and operation of the SQUID are outlined. With the aid of a superconducting flux transformer, the SQUID achieves a magnetic field noise of 10-15 T Hz-1/2; it can also be configured as a...Go to contribution page
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Dragana Popovic (SENIS GmbH, Zug, Switzerland)MeasuresWe shall present a novel 3-axes teslameter based on the first three-axes fully integrated Hall probe [1]. The integrated Hall probe consists of a sensing part, analogue electronics and digital synchronisation circuit. A horizontal Hall element measures the perpendicular component; and two vertical Hall devices [2] measure the two in-plane components of a magnetic field. The probe...Go to contribution page
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27. Truffaldino + Smeraldina; A collection of tools for simulating magnetic field measurement probesPierre Schnizer (Gesellschaft fuer Schwerionenforschung mbH (GSI))SoftwareVarious literature discribes formulae to calculate the sensitivity of coil probes. These, however, are impractical for the casual user. Truffaldino is a numerical tool to calculate such effects (as described in IMMW XII) and Smeraldina a graphical user interface, which allows to use Truffaldino without any programming background. This talk will concentrate on the...Go to contribution page
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Dr Isaac Vasserman (Argonne National Laboratory)DevicesThere have been upgrades to all subsystems of the insertion device magnetic measurement system: the Hall probe, the moving coil, the stretched rotating coil, and the stretched single-wire system. The noise levels and reproducibility of measurements have been improved considerably so that no statistics are needed in integral measurements. Only one measurement is enough and two scans...Go to contribution page
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Zack Wolf (SLAC)MeasuresThe LCLS quadrupoles must be fiducialized to 25 microns. This talk describes the system we are building to perform the fiducialization.Go to contribution page
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Dr Animesh Jain (Brookhaven National Laboratory, USA)MeasuresBNL is building a pair of compact multi-function superconducting magnets to be placed inside the BES experimental detector solenoid for a luminosity upgrade of the Electron Positron Collider (BEPC-II) at IHEP, Beijing. These magnets are produced by a direct wind technology, originally developed at BNL for the HERA luminosity upgrade at DESY. The main quadrupole layers of the...Go to contribution page
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