CERN Accelerating science

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1.
Induction-Coil Measurement System for Normal- and Superconducting Solenoids / Petrone, Carlo (CERN) ; Sorti, Stefano (CERN) ; Dalane, Eivind (CERN) ; Mehl, Bertrand (CERN) ; Russenschuck, Stephan (CERN)
The magnetic measurement of solenoids relies on different methods to characterize the field quality and locate the magnetic axis. Usually, Hall mappers and stretched-wire systems are used for these tasks. [...]
2022 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 9000605 Fulltext: PDF;
2.
A Transducer for Measuring the Field Quality in Superconducting Solenoids / Petrone, Carlo (CERN) ; Bordini, Bernardo (CERN) ; Buzio, Marco (CERN) ; Russenschuck, Stephan (CERN)
The critical current of superconducting wires is measured at CERN in four test stations that use high-field superconducting solenoid magnets achieving up to 15 T. The reduction of the uncertainty in the critical-current measurements requires the field mapping of the solenoids in their operating condition. [...]
2020 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 30 (2020) 9000505
3.
A Translating-Coil Magnetometer for the Magnetic Measurements of the HL-LHC High-Order Corrector Magnets at Room Temperature / Pentella, Mariano (CERN) ; Dalane, Eivind (CERN) ; De Matteis, Ernesto (LASA, Segrate) ; Gautheron, Emma L (CERN) ; Mariotto, Samuele (LASA, Segrate) ; Petrone, Carlo (CERN) ; Prin, Herve (CERN) ; Prioli, Marco (LASA, Segrate) ; Russenschuck, Stephan (CERN) ; Statera, Marco (LASA, Segrate) et al.
This article describes the design and development of a translating-coil magnetometer for the room-temperature magnetic measurements of the superferric, high-order corrector magnets for the high-luminosity upgrade of the Large Hadron Collider at CERN (HL-LHC). The measurement system consists of a set of induction coils, tangentially positioned on a measurement head. [...]
2024 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 9000505 Fulltext: PDF;
4.
Boundary-Element Methods for Field Reconstruction in Accelerator Magnets / Liebsch, Melvin (CERN) ; Russenschuck, Stephan (CERN) ; Kurz, Stefan (Darmstadt, Tech. U.)
Magnetic fields in the aperture of particle accelerator magnets can be represented by boundary potentials, exploiting Kirchhoff’s integral equation. Depending on the formulation, magnetic measurement data can be represented by the discrete approximations of Dirichlet or Neumann data at the domain boundary. [...]
2020 - 4 p. - Published in : IEEE Trans. Magn. 56 (2020) 7511104
5.
Measurement and Analysis of the Dynamic Effects in an HTS Dipole Magnet / Petrone, Carlo (CERN) ; van Nugteren, Jeroen (CERN) ; Bajas, Hugues (CERN) ; Bottura, Luca (CERN) ; Kirby, Glyn (CERN) ; Rossi, Lucio (CERN) ; Russenschuck, Stephan (CERN)
The EuCARD-2 project, co-funded by the European Commission, supports the design, production and standalone cold testing of a high-temperature, superconducting demonstrator insert-magnet. The so-called Feather-M2 dipole magnet was built at CERN, using Roebel cable consisting of REBCO coated conductor tapes. [...]
2018 - 4 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4604404
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4604404
6.
Encoder-Less Acquisition System for Rotating-Coil Measurements / Rogacki, Piotr (CERN) ; Fiscarelli, Lucio (CERN) ; Russenschuck, Stephan (CERN)
The established approach to rotating-coil measurements involves the integration of the induced voltage signal, triggered by an angular encoder, to re-parameterize the signal from time to the traveled arc length. The encoder is thus deemed necessary to ensure the rejection of speed variation errors. [...]
2024 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4000605 Publication: PDF;
7.
Alignment of a Solenoid System by Means of a Translating-Coil Magnetometer / Pentella, Mariano (CERN) ; Kjellqvist, Ville Mattias Mattsson (CERN) ; Petrone, Carlo (CERN) ; Russenschuck, Stephan (CERN) ; von Freeden, L (CERN)
The electron cooler operating at the Antiproton Decelerator (AD) at CERN is at the end of its life cycle. The electron cooler, operated for over 40 years, has been used to decelerate anti-proton beams having an energy of about 5.3 MeV. [...]
2024 - 4 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 9001404 Fulltext: PDF;
8.
An induction-coil magnetometer for mid-plane measurements in spectrometer magnets / Liebsch, Melvin (CERN) ; Russenschuck, Stephan (CERN) ; Kaeske, Jens (CERN ; KIT, Karlsruhe)
Induction-coil magnetometers are among the most common devices for measuring both static and transient magnetic fields in accelerator and spectrometer magnets. Recent developments have included an induction-coil array mounted on a sledge, which is translated on the mid-plane of normal-conducting spectrometer magnets. This device, subsequently denoted as the moving fluxmeter, is used to derive the field homogeneity in the magnet center, as well as the gradients in the fringe-field areas. [...]
2023 - 8 p. - Published in : Sens. Actuators A 355 (2023) 114334 Fulltext: PDF;
9.
A Rotating-Coil Scanner for the Precise Magnetic Characterization of Superconducting Accelerator Magnets at Ambient Temperature / Rogacki, Piotr (CERN ; RWTH Aachen U.) ; Fiscarelli, Lucio (CERN) ; Russenschuck, Stephan (CERN) ; Hameyer, Kay (RWTH Aachen U.)
This article presents a versatile scanning system for the magnetic measurements of the accelerator magnets. This system, based on a rotating-coil magnetometer, has been developed to meet the accuracy requirements imposed by the inner-triplet quadrupoles for the High Luminosity Large Hadron Collider (HL-LHC) project at CERN. [...]
2021 - 5 p. - Published in : IEEE Trans. Magn. 57 (2021) 6100105 Fulltext: PDF;
10.
Challenges in extracting pseudo-multipoles from magnetic measurements / Russenschuck, Stephan (CERN) ; Caiafa, Gianni (CERN) ; Fiscarelli, Lucio (CERN) ; Liebsch, Melvin (CERN) ; Petrone, Carlo (CERN) ; Rogacki, Piotr (CERN)
Extracting the coefficients of Fourier-Bessel series, known as pseudo-multipoles or generalized gradients, from magnetic measurements of accelerator magnets involves technical and mathematical challenges. First, a novel design of a short, rotating-coil magnetometer is required that does not intercept any axial field component of the magnet. [...]
2019 - 6 p. - Published in : 10.18429/JACoW-ICAP2018-SUPAG03 Fulltext from publisher: PDF;
In : 13th International Computational Accelerator Physics Conference (ICAP 2018), Key West, FL, USA, 20 - 24 Oct 2018, pp.SUPAG03

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