Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Cryoplant | A vertical displacement event

    Three vertical storage tanks have been installed since last week outside of the cryoplant. The operation requires two powerful cranes working in tandem but also [...]

    Read more

  • Science in Texas | ITER draws enthusiasm

    At its Annual Meeting in Austin, Texas, the American Association for the Advancement of Science, AAAS, invited participants to illustrate how investment in basi [...]

    Read more

  • Image of the week | In the belly of the (flying) whale

    On 15 February, 'Isabelle' and 'Jeanne,' the last of the ten toroidal field coils manufactured in France for the EU-Japan tokamak JT-60SA, were swallowed into t [...]

    Read more

  • Nuclear safety | "A pragmatic and creative approach"

    Safety is at the core of all nuclear activities. Over the past seven decades—since the first experimental reactor was brought to criticality in 1942—codes, stan [...]

    Read more

  • Intellectual property | Modernizing processes and practices

    'A wise man will always allow a fool to rob him of ideas without yelling 'Thief.' If he is wise, he has not been impoverished,' says Ben Hecht in A Child of the [...]

    Read more

Of Interest

See archived articles

W7-X stellarator : the step-by-step march toward first plasma

Isabella Milch, Max-Planck-Institut für Plasmaphysik

Preparing a fusion device for first plasma is a step-by-step, carefully monitored process. In the last two months at Wendelstein 7-X, superconducting temperatures of 4 K were achieved, the vessel was sealed tight, and evacuation (to create a vacuum) began. In May, the magnets will be tested for the first time under power. Photo: IPP, Torsten Bräuer (Click to view larger version...)
Preparing a fusion device for first plasma is a step-by-step, carefully monitored process. In the last two months at Wendelstein 7-X, superconducting temperatures of 4 K were achieved, the vessel was sealed tight, and evacuation (to create a vacuum) began. In May, the magnets will be tested for the first time under power. Photo: IPP, Torsten Bräuer
Preparations for the operation of the Wendelstein 7-X fusion device in Greifswald, Germany are in full swing. In advance of the decisive magnet cooling stage many preparatory steps have been carried out, including the cleaning and flushing of the numerous helium cooling pipes and the start-up of the cryoplant (which had undergone thorough testing at an earlier date). 

On 13 February the gradual cooling of the cryoplant got off to a start. All systems were carefully monitored during the step-by-step process, with particular attention to checking for leaks in the piping or cooling systems.

Four weeks later, on 10 March, the target temperature of 4 K was attained—an essential milestone, as well as a prerequisite, for superconductivity in the magnets. Verifications will still take some time yet; presumably in May the magnets will be tested for the first time under power.

On 12 March the last ports in the plasma vessel were sealed vacuum-tight and evacuation of the vessel could begin. In addition to readying diagnostic equipment and working on switchgear and cabling, the verification of leak-tightness in the numerous connections and seals is proceeding. 

A "first plasma" in Wendelstein 7-X is expected by the end of 2015, at the latest.

Read the original article on the IPP website.


return to the latest published articles