Design of a HTS solenoid for a gyrotron magnet upgrade

  • S. Sanz*
  • , P. Abramian
  • , J. Calero
  • , A. Fernández
  • , L. García-Tabarés
  • , J. L. Gutierrez
  • , J. Lucas
  • , E. Rodríguez
  • , I. Rodríguez
  • , F. Toral
  • , C. Vázquez
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The design of a HTS cryogen-free solenoid for a gyrotron magnet upgrade is presented. This gyrotron is used to set up and warm the plasma in an experimental fusion device at Ciemat. The solenoid will be wound with BISCCO-2223 tapes. A two stage Gifford-McMahon cryocooler will be used to cool down the magnet. A significant operation cost will be saved as the present solenoid is a Nb-Ti magnet cooled down in a helium bath supplied with mobile tanks. The main requirement of the magnet is to reproduce the original magnetic profile in the axis of the solenoid with a peak of 2 T in a 150 mm diameter warm bore. The magnet consists of several stacked double-pancake coils. The outer radii, the axial positions and the number of windings have been optimized by means of a genetic algorithm. Afterwards, the cryostat design is also described, including the heat leakage calculation. Finally, the winding techniques and the results of the tests of a prototype coil are also reported in this paper.

Original languageEnglish
Pages (from-to)1406-1409
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume17
Issue number2
DOIs
Publication statusPublished - Jun 2007
Externally publishedYes

Keywords

  • Bismuth compounds
  • Cryogenics
  • Genetic algorithms
  • Gyrotrons
  • High-temperature superconductors

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