Andries den Ouden

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Keystoned superconducting Rutherford cables are widely used in accelerator magnets like in the LHC at CERN. An essential requirement in the cable design is its stability against local heat releases in the magnet windings originating from for example, strand movement or beam loss. Beam loss is the highest at the coil inner radius of the magnet, where also(More)
The Next European Dipole (NED) project is a EU funded program aiming at the realization of a 15 T accelerator-type of Nb<sub>3</sub>Sn dipole magnet. The objective of NED phase one is developing high performance Nb<sub>3</sub>Sn conductor in collaboration with European industry. The envisaged Rutherford type of cable consists of about 40 superconducting(More)
The accuracy of joint angle measurement of the hand may be negatively influenced by joint swelling, deformation and other obstacles. We developed an alternative goniometer with clear ergonomic advantages, especially for the measurement of small joints. This new concept of goniometry is described and preliminary results on the reliability of the measurements(More)
For the Next European Dipole (NED) program, a Powder-In-Tube (PIT) strand was successfully developed by SMI. This high-performance Nb<sub>3</sub>Sn strand presents a non-copper critical current density of ~ 2500 A/mm<sup>2</sup> at 12 T applied field and 4.2 K and a filament diameter around 50 mum. Extensive heat treatment optimization studies were(More)
A 45 T Hybrid Magnet System is being developed at the Nijmegen High Field Magnet Laboratory as part of the Nijmegen Center for Advanced Spectroscopy. The 45 T Hybrid Magnet System will be used in combination with far-infra-red light produced by a Free Electron Laser under construction directly adjacent to the High Field Magnet Laboratory. The(More)
A-priori knowledge of the normal zone development in MgB/sub 2/ conductors is essential for quench protection of applications. Therefore the normal zone propagation in a monofilament MgB/sub 2//Fe conductor under near-adiabatic conditions at 4.2 K has been measured and simulated. The results show normal zone propagation velocities up to several meters per(More)
GSI, Darmstadt is preparing to build FAIR (Facility for Antiproton and Ion Research) which include SIS 300, a 300T - m fast-ramping heavy ion synchrotron. Dipoles for this ring will be 2.9 m long, producing 6 T over a 100 mm coil aperture and ramped at 1 T/s. The cable for these dipoles must have low losses and produce acceptable field distortions during(More)
We report on a multi-institute comparison of critical current data measured on a modern NbTi wire for the Large Hadron Collider (LHC), which has shown a standard deviation below 1% in critical current density spread in more than 1500 measurements. Interlaboratory comparisons on Nb<sub>3</sub>Sn wires have shown ambiguities that could be attributable to(More)
In 2011, we have presented the design of a 38-T resistive magnet with a 32-mm bore, which has been designed to satisfy the users' demand for higher magnetic fields. Manufacturing of the parts started in 2012 and has been completed in early 2013. In this paper, we present the final design specifications and report on the construction, commissioning, and(More)
Self-absorbing quench protection schemes for accelerator magnets mainly rely on longitudinal and turn-to-turn normal zone propagation (NZP) immediately after the occurrence of a quench and subsequently on the effectiveness of protection heaters. Especially for impregnated Nb/sub 3/Sn coils the protection should not only aim at limitation of the hot spot(More)