Subscribe options

Select your newsletters:

Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Technology | The many wonders of ITER diagnostics

    The eyes and ears of virtually all plant functions, ITER diagnostic sensors and accompanying systems will play an essential role at ITER. They will keep the rea [...]

    Read more

  • Outreach | Industry really can be "extraordinaire"

    'Great things are done by a series of small things brought together.' This quote, attributed to the Dutch painter Vincent Van Gogh, could have been the perfect [...]

    Read more

  • Tokamak Building | Civil works completed

    The olive tree that stood for a few days at the top of the Tokamak Building marked the completion of a five-year effort by Europe and its main contractor VFR to [...]

    Read more

  • Assembly Hall | Another massive handling tool

    Inside of the Assembly Hall, some of ITER's heaviest components will have to be raised ever so carefully from their horizontal delivery positions to vertical. T [...]

    Read more

  • Image of the week | Time to celebrate

    It is traditional, in the world of construction, to celebrate the completion of a house or building by placing a leafy branch on its roof or topmost beam. The p [...]

    Read more

Of Interest

See archived entries

Wendelstein 7-X

A stellarator record for "triple product"

There is news of success from Wendelstein 7-X, where a record "triple product" value for stellarators was obtained during the most recent experimental campaign.

The new graphite tile cladding at Wendelstein 7-X permits higher termperatures and longer plasma discharges. (Click to view larger version...)
The new graphite tile cladding at Wendelstein 7-X permits higher termperatures and longer plasma discharges.
Newly equipped with 8,000 graphic wall tiles and ten divertor modules, Wendelstein 7-X resumed operation in September 2017, ready for higher plasma temperatures and longer discharges.

The first experiences with the new wall elements were highly positive, according to Thomas Sunn Pedersen, head of the Stellarator Edge and Divertor Physics group. Plasmas lasting 26 seconds (up from six during the first campaign) and 75 MJ (18x higher) were routinely produced.

As a result, a record value for fusion triple product (a plasma's particle density, energy confinement time, and ion temperature) was achieved. This parameter tells scientists how close they are getting to the values needed to "ignite" the plasma and have it become completely self-sustaining (i.e., without external heating).

Further adjustments to the device's diagnostic and heating systems are planned. The objective of Wendelstein 7-X is to investigate the suitability of the stellarator type of fusion device for a future power plant.

Read the article published on the website of the Max Planck Institute for Plasma Physics (IPP).


return to the latest published articles