D. Leboeuf

Publications (3)3.12 Total impact

• Article: Manufacturing and Test of a Short Quadrupole Magnet Model at CEA/Saclay

  L. Quettier, M. Durante, M. Segreti, F. Simon, D. Leboeuf, Y. Le Noa
  [show abstract] [hide abstract]
  ABSTRACT: IRFU/SACM at CEA/Saclay has undertaken an R&D program on Nb₃Sn aimed at designing, building and testing a 1-m-long, 56-mm-single-aperture quadrupole magnet model. Model design is based on the design of LHC arc quadrupole magnets, without iron yoke. It is expected to reach a nominal field gradient of 211 T/m at 11,870 A. The main goal of the program is to learn about Nb₃Sn technology and evaluate fabrication techniques relative to the use of this superconductor. Coils are manufactured by the so called ldquowind, react and impregnaterdquo technique. Laminated, austenitic steel collars are locked around the coil assembly by means of keys in order to restrain Lorentz forces. Coil manufacturing and magnet assembly have been achieved in 2007. Cold mass assembly is under work. Warm field measurements are carried out at each step of magnet and cold mass assembly. After a brief recall of the conceptual design, the paper reviews the manufacturing of the coils and of the magnet assembly and presents the results of warm magnetic field measurements.
  IEEE Transactions on Appiled Superconductivity 07/2009; · 1.04 Impact Factor
• Source

  Available from: cern.ch

  Article: Quench propagation ignition using single-mode diode laser

  F. Trillaud, F. Ayela, A. Devred, M. Fratini, D. Leboeuf, P. Tixador
  [show abstract] [hide abstract]
  ABSTRACT: The stability of NbTi-based multifilamentary composite wires subjected to local heat disturbances of short durations is studied in pool boiling helium conditions. A new type of heater is being developed to characterize the superconducting to normal state transition. It relies on a single-mode Diode Laser with an optical fiber illuminating the wire surface. This first paper focuses mainly on the feasibility of this new heater technology and eventually discusses the difficulties related to it. A small overview of Diode Lasers and optical fibers revolving around our application is given. Then, we describe the experimental setup, and present some recorded voltage traces of transition and recovery processes. In addition, we present also some energy and Normal Zone Propagation Velocity data and we outline ameliorations that will be done to the system.
  IEEE Transactions on Appiled Superconductivity 07/2005; · 1.04 Impact Factor
• Source

  Available from: Maria Durante

  Article: Development and manufacturing of a Nb3Sn quadrupole magnet Model at CEA/Saclay for TESLA Interaction Region

  M. Durante, A. Devred, M. Fratini, D. Leboeuf, M. Segreti, P. Vedrine
  [show abstract] [hide abstract]
  ABSTRACT: One possible application of Nb₃Sn, whose superconducting properties far exceed those of NbTi, is the fabrication of short and powerful quadrupole magnets for the interaction regions of large particle accelerators. In some projects, as in the future linear collider TESLA, the quadrupole magnets are inside the detector solenoid and must operate in its background field. This situation gives singular Lorentz force distribution in the ends of the magnet. To learn about Nb₃Sn technology, evaluate fabrication techniques and test the interaction with a solenoidal field, DAPNIA/SACM at CEA/Saclay has started the manufacturing of a 1-m-long, 56-mm-single-aperture quadrupole magnet model. The model relies on the same coil geometry as the LHC arc quadrupole magnets, but has no iron yoke. It will produce a nominal field gradient of 211 T/m at 11,870 A. The coils are wound from Rutherford-type cables insulated with glass fiber tape, before being heat-treated and vacuum-impregnated with epoxy resin. Laminated, collars, locked around the coil assembly by means of keys restrain the Lorentz forces. After a recall of the conceptual design, the paper will review the progress in the manufacturing and test of the main components as well as the design and delivery of the main tooling. The first coil should be wounded and reacted during the last quarter of the year 2003.
  IEEE Transactions on Appiled Superconductivity 07/2004; · 1.04 Impact Factor