NED CONDUCTOR REVIEW

Name: NED CONDUCTOR REVIEW
Start: 2008-11-04T13:20:00+01:00
End: 2008-11-05T12:00:00+01:00
Location: CERN

4 Nov 2008, 13:20 → 5 Nov 2008, 12:00 Europe/Zurich

30/7-012 (CERN)

30/7-012

CERN

Bldg. 30/7.012

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.

Support

rachelle.decreuse@cern.ch

Tuesday 4 November
- Tue 4 Nov
- Wed 5 Nov
- 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
  
  Curr_VI_6T_1200A.avi
  
  Curr_VI_6T_magnetic.avi
  
  Temp_VI_6T_1200A.avi
- 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
  
  SEEBER-NED-REVIEW-081104.pdf
  
  Stress_on_superconductors.1.pdf
  
  Stress_on_superconductors.1.ppt
- 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
- Tue 4 Nov
- Wed 5 Nov
- Discussion session and report writing