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Laboratory electromagnets: from the beginnings to Electromagnet Laboratories

Publications associées (35)

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Development of magnet technologies for HTS insert coils

Pierluigi Bruzzone, Davide Uglietti, Boris Stepanov, Rainer Wesche, Stephen Alfred March, Natalia Hanna Glowa

An existing Nb3Sn laboratory magnet generating a magnetic field of 12 T is intended to be upgraded to 16 T by means of the use of a high temperature superconductor (HTS) insert coil. An outline design of the HTS insert coil is presented. In the design, the ...

Elsevier Science Bv2012

Design of a quench protection system for a coated conductor insert coil

Davide Uglietti

Coated conductors are promising material for the construction of high field magnets, but the slow propagation velocity of the normal zone makes the protection against quenches a critical issue. The quench protection system for a small insert coil under dev ...

IEEE-Inst Electrical Electronics Engineers Inc2012

Review of design aspects for high current Nb3Sn conductors

Pierluigi Bruzzone

Cabled conductors based on Nb3Sn technology with operating current in the range of 20 kA and above are mainly restricted to fusion magnets and high field facilities. The experience of last decade has dramatically shown that, opposite to the NbTi conductors ...

2011

Magnetic Stationary Phases for Protein Adsorption

Anne-Laure Gassner

Magnetic beads (MB) have now proven to be a powerful tool in both research and biomedical applications. They are available in a wide range of sizes (from nm to several µm) and their surface can be modified with molecules having biological specificities and ...

EPFL2011

Micro Fluxgate Sensor with Cascaded Planar Ring Cores

Pavel Kejik, Ozge Zorlu

In this paper, we present a new microfabricated fluxgate sensor structure having cascaded planar rings as the ferromagnetic core. A circular magnetic excitation is provided with a rod passing through the FeNi rings as a sewing thread. Planar coils placed u ...

2009

Transient Heat Transfer Model and Stability Analysis of helium-cooled Superconducting Cables

Luca Bottura, Pier Paolo Granieri, Panagiota Xydi

The stability is a key issue to design superconducting magnets and to ensure their proper exploitation. This is the case of the imminent operation of the Large Hadron Collider (LHC) accelerator, which requires a good knowledge of the stability margin of it ...

2008

Enhancing the control of tokamaks via a continuous nonlinear control law

Jean-Yves Favez

The control of the current, position and shape of an elongated cross-section tokamak plasma is complicated by the instability of the plasma vertical position. In this case the control becomes a significant problem when saturation of the power supplies is c ...

EPFL2004

Modelling of high temperature superconductors for AC power applications

This Ph.D. thesis is focused on the development of novel models for calculation of AC losses, current and magnetic field profiles in high-temperature superconductors (HTS). The thesis is concentrated on the modelling of Bi-2223 conductors at 77 K, which fo ...

EPFL2002

Development of a 20 kA high temperature superconductor current lead

Martin Vogel

The reduction of static heat load in superconducting magnet systems is of great importance because of reduction of refrigeration power and operational costs. The major elements that determine the heat load are the current leads. The use of high temperature ...

2001

Integrated electromagnetic levitation and guidance system for SwissMetro project

Alfred Rufer

Electromagnetic levitated and guided systems are commonly used in the field of people transport vehicles, tool machines, frictionless bearings and conveyor systems. In the case of low speed people transport vehicles, the electromagnetic levitation offers t ...

2000