Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Computer-Aided Design | A new platform with Australia

    In September 2016, the signature of a Cooperation Agreement between the Australian Nuclear Science and Technology Organisation (ANSTO) and the ITER Organization [...]

    Read more

  • ITER Council | Project metrics confirm performance

    The governing body of the ITER Organization, the ITER Council, met for the twenty-first time on 15 and 16 November 2017 under the chairmanship of Won Namkung (K [...]

    Read more

  • Ten years later | A prodigious adventure

    ITER began its existence as an aspiration in the early 1980s, as actors in the fusion community called for the joint machine that would demonstrate the feasibil [...]

    Read more

  • Image of the week | An impromptu visit

    Afteraddressing the UN Climate Change Conference on 15 November, French President Emmanuel Macron toured thecolourful COP23 exhibition zone. It was towards the [...]

    Read more

  • Cryoplant | How to install a compressor

    In order to properly install a helium compressor skid on its concrete pad, you need to start with a large push broom to sweep away the dust that inevitably accu [...]

    Read more

Of Interest

See archived articles

China successfully tests correction coil current leads

Pierre Bauer, ITER Superconductor Section

The ASIPP high temperature superconductor current leads team: (back left to right) H. Feng, L. Niu, X. Huang, T. Zhou; (front left to right) Y. Song, Y. Bi, Y. Yang, K. Ding (Click to view larger version...)
The ASIPP high temperature superconductor current leads team: (back left to right) H. Feng, L. Niu, X. Huang, T. Zhou; (front left to right) Y. Song, Y. Bi, Y. Yang, K. Ding
The high-temperature superconductor current leads are designed to transmit high currents from the room-temperature power supplies to the low-temperature superconducting coils with minimum heat load.
 
For this they use a short segment with high temperature superconductor (HTS), which can carry much higher current-densities than normal conductors such as copper. It can therefore conduct the current using much less material (smaller cross-sections), thus reducing the heat conduction.
 
The heat load reduction by the HTS current lead results in a decrease of the power input (here cryo-power), greatly improving the efficiency of the ITER device. The HTS current lead technology is therefore one of the "enabling" technologies for a fusion tokamak.
 
The HTS current leads are part of the so-called feeders, a set of ITER components provided by China.  
 
The Institute of Plasma Physics of the Chinese Academy of Sciences (ASIPP) in Hefei, China, started development of such current leads more three years ago. In Dec 2008, Newsline reported on a successful test of a 68 kA current lead prototype needed for a toroidal field coil feeder.
 
ASIPP tested two prototypes of the 10 kA high temperature superconductor current lead for the ITER correction coil feeders. (Click to view larger version...)
ASIPP tested two prototypes of the 10 kA high temperature superconductor current lead for the ITER correction coil feeders.
Now the ASIPP HTS team has successfully tested two prototypes of the 10 kA HTS current lead for the ITER correction coil feeders. On 4 July 2010, the HTS current lead was operated for several hours at the peak 10 kA current, which is 20 percent above the average current during a typical correction coil powering cycle.
 
The results were discussed at a special meeting of the ITER HTS working group at KIT in Karlsruhe, Germany, last week (15-16 July). This successful test completes the HTS current lead R&D conducted at ASIPP in preparation of the feeder final design review this coming September for which the feeder teams in China and at the ITER Organization are now feverishly preparing.


return to the latest published articles