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NED CONDUCTOR REVIEW

→ Europe/Zurich
30/7-012 (CERN)

30/7-012

CERN

Bldg. 30/7.012
30
Show room on map
Gijs DE RIJK (CERN)
Description
The aim of the review is twofold. Firstly, the NED Nb3Sn conductor development program should be reviewed such that the achievements, the main difficulties and the limitations are brought out. Secondly, using the experience of this conductor program, the requirements for new dipoles and quadrupoles and the existing open issues, recommendations for the next steps in Nb3Sn conductor development for accelerator magnets at CERN should be formulated.
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  • Tuesday 4 November
    • 1
      NED ESAC introduction
      Slides
    • 2
      History of the NED conductor program
      The aims, the developments over the 4 years, the benchmark numbers, how we got to the NED specification
      Speaker: Luc-Rene Oberli (CERN)
      Slides
    • 3
      Results of the PIT conductor development
      In the frame of the NED project, EAS/SMI successfully developed a Powder-In-Tube Nb3Sn conductor design and is currently manufacturing the final strand. The strand development, fabrication and delivery will be reviewed, together with characterization results for the achieved strands.
      Speaker: Thierry Boutboul (CERN)
      Slides
    • 4
      Results of the IT conductor development
      The strand development performed by Alstom through an innovative fabrication process and through a more conventional process will be reviewed together with the results achieved during the first two steps of development preceding the final fabrication on the NED strand. Alstom is currently launching in fabrication the final strand for the NED project. The delivery schedule of the final strand will be presented.
      Speaker: Luc-Rene Oberli (CERN)
      Slides
    • 5
      Results of the cable development
      For the NED program, two Rutherford-type cables were already made on the basis of PIT strands: a 40-strand ~27 mm wide cable by LBNL and a 14-strand ~ 10 mm wide cable for the Short Model Coil program at CERN. The characterization results for strands extracted from both cables are summarized and the cabling critical current degradation is discussed as function of the heat treatment schedule.
      Speaker: Thierry Boutboul (CERN)
      Slides
    • 6
      Guidelines on stability
      What are the outstanding stability issues and what does this mean for the parameter space of Fresca2 and HQ. Requirements on strand diameter, filament diameter and RRR in relation to Jc and B.
      Speaker: Bernardo Bordini (Unknown)
      Slides
      Video
    • 15:20
      Coffee Break
    • 7
      Review on stress sensitivity
      What do we know about stress sensitivity and where do we need more data. What do we need for Fresca2 and HQ on stress robustness.
      Speakers: Bernd SEEBER (University of Geneva), René Flükiger (University of Geneva)
      Slides
    • 8
      Dipole conductor needs: examples for Fresca2
      Using several existing cables (e.g. HD2-OST and NED) a comparison will be presented between the existing HD2 and a set of conceptual Fresca2 designs. The conceptual designs are cosΘ, block coil and hybrid Nb3Sn - Nb-Ti block coil. From this directions and its consequences for conductors needed for high fields will be indicated.
      Speaker: Glyn Kirby (CERN)
      Slides
    • 9
      Quadrupole conductor needs: examples for HQ
      Using the HQ as an example, the possible field and stress values for a fixed number of conductor cases and coil layouts are to be evaluated. From this a recommendation which type of conductor would be best is to be deduced.
      Speaker: Shlomo Caspi (Lawrence Berkeley national laboratory USA)
      Slides
    • 10
      Adjourn
  • Wednesday 5 November
    • Discussion session and report writing
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