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The 16 T Dipole Development Program for FCC and HE-LHC

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Thermo-electric analysis of the interconnection of the LHC main superconducting bus bars

Luca Bottura, Pier Paolo Granieri

Spurred by the question of the maximum allowable energy for the operation of the Large Hadron Collider (LHC), we have progressed in the understanding of the thermo-electric behavior of the 13 kA superconducting bus bars interconnecting its main magnets. A ...

2013

Investigations of quench limits of the LHC superconducting magnets

Minh Quang Tran, Bernd Dehning, Agnieszka Priebe

NbTi-based Rutherford cables are used in the coils of the Large Hadron Collider (LHC) magnets. These cables are designed to operate with currents up to 13 kA at temperatures of 1.9 K. Beam losses can locally heat the superconducting cables above the critic ...

Ieee-Inst Electrical Electronics Engineers Inc2012

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

Analysis of Defective Interconnections of the 13 kA LHC Superconducting Bus Bars

Luca Bottura, Pier Paolo Granieri

The interconnections between Large Hadron Collider (LHC) main dipole and quadrupole magnets are made of soldered joints of two superconducting cables stabilized by a copper bus bar. The 2008 incident revealed the possible presence of defects in the interco ...

2012

Analysis of Defective Interconnections of the 13 kA LHC Superconducting Bus Bars

Luca Bottura, Pier Paolo Granieri

Ieee-Inst Electrical Electronics Engineers Inc2012

Ring magnets for magnetic beads trapping in a capillary

Hubert Girault, Anne-Laure Gassner

This paper introduces the concept of ring magnets for magnetic beads (MBs) trapping in a capillary. Such magnets enable an easy insertion of a capillary simply like a pearl on a string. With this system, high magnetic forces are obtained thanks to the prox ...

Royal Society of Chemistry2011

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

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

An early separation scheme for the LHC luminosity upgrade

Guido Sterbini

In this thesis we evaluate the potential of the Early Separation Scheme for the Luminosity Upgrade of the Large Hadron Collider (LHC). The main goal of the Early Separation Scheme is to reduce the crossing angle between the proton beams at the collision po ...

EPFL2010

PC-Keyboard with force feedback: Sensorless position detection by current measurement

Martin Stöck

Grégory Savioz is working in collaboration with Logitech. The goal of his work is to develop a "haptique" keyboard. A functional prototype of one key was already realized. Till now a hall sensor was used to measure the position of the key. The prototype co ...

2010