Subscribe options

Select your newsletters:

Please enter your email address:

@

Your email address will only be used for the purpose of sending you the ITER Organization publication(s) that you have requested. ITER Organization will not transfer your email address or other personal data to any other party or use it for commercial purposes.

If you change your mind, you can easily unsubscribe by clicking the unsubscribe option at the bottom of an email you've received from ITER Organization.

For more information, see our Privacy policy.

News & Media

Latest ITER Newsline

  • Assembly | Set of handling tools for in-vessel installation finalized

    Inside of a test facility that reproduces the volume and geometry of the ITER vacuum vessel environment, a team from CNIM Systèmes Industriels has dem [...]

    Read more

  • 360° image of the week | The assembly theatre

    Ever since it was invented almost two centuries ago, photography has tried to capture what the human eye actually sees. Despite huge progress achieved, it has n [...]

    Read more

  • Science | Favourable impurity dynamics in ITER confirmed by experiment

    Recent studies at the JET tokamak confirm the physics basis for tungsten transport at the edge of fusion-producing plasmas in ITER and the project's strategy fo [...]

    Read more

  • Image of the week | 15th D-shaped coil delivered

    Fifteen out of ITER's 19 D-shaped toroidal field coils have been delivered. Toroidal field coils are among the largest and heaviest components of the ITER machi [...]

    Read more

  • Spinoffs | Japan develops first high-output, multi-frequency gyrotron

    Building off expertise developed in the supply of high-power, high-frequency gyrotrons for the ITER Project and the JT-60SA tokamak, Japan's National Insti [...]

    Read more

Of Interest

See archived entries

Conference

Fun-filled vacuum

The science of ITER is not simple. But with a bit of imagination (and a dose of humour) a way can be found to convey the most complex physics notions to a public of non-specialists.

As no horse was available in the ITER amphitheatre, the re-enactment of the famous 1654 ''Magdeburg hemispheres'' experiment was conducted with two ITER volunteers. (Click to view larger version...)
As no horse was available in the ITER amphitheatre, the re-enactment of the famous 1654 ''Magdeburg hemispheres'' experiment was conducted with two ITER volunteers.
Last week, as a large number of staff members were assembled to attend the fourth presentation in a new ITER technology series, Vacuum Section leader Robert Pearce demonstrated that vacuum—the presentation's theme—not only could be made "understandable" but could also be a lot of fun.

One of the highlights of his presentation was a reenactment of the famous 1654 "Magdeburg hemispheres" demonstration, when a German scientist pumped air out of two joined copper hemispheres and had two teams of 15 horses try to separate them by pulling in opposite directions.

The ITER vacuum team members demonstrated that vacuum not only could be made ''understandable'' but could also be a lot of fun. Pictured here are Liam Worth, vacuum design and construction officer (foreground) and Silvio Giors, vacuum cryo-pumping engineer. (Click to view larger version...)
The ITER vacuum team members demonstrated that vacuum not only could be made ''understandable'' but could also be a lot of fun. Pictured here are Liam Worth, vacuum design and construction officer (foreground) and Silvio Giors, vacuum cryo-pumping engineer.
As no horses were available in the ITER amphitheatre, the experience was conducted with two volunteers: head of ITER Project Control Office Hans-Henrich Altfeld and cooling water engineer Fabio Somboli.

But like the horses of 364 years ago—and despite much pulling, puffing and panting—they were unable to overcome the atmospheric pressure that keeps the spheres attached to one another. (At this point of the presentation we learn that the atmospheric pressure comes from the gravitational force of the air molecules.)

Close to eight years ahead of schedule, ITER's First Plasma was produced last week in the Headquarters amphitheatre ... Pictured here: Vacuum Section leader Robert Pearce (left) and Silvio Giors. (Click to view larger version...)
Close to eight years ahead of schedule, ITER's First Plasma was produced last week in the Headquarters amphitheatre ... Pictured here: Vacuum Section leader Robert Pearce (left) and Silvio Giors.
There were other very interesting facts to glean from Pearce's presentation—that an absolute vacuum cannot exist even in the deepest and darkest outer space; that vacuum can boil and freeze water simultaneously; and that extremely cold surfaces coated with finely ground coconut charcoal are perfect for imprisoning helium particles.

But the most popular moment of the show was the production of a plasma, created by injecting argon gas into a small vacuum chamber equipped with a magnet, and running a current.

And there we had it: ITER's First Plasma close to eight years ahead of schedule. Not inside the Tokamak vacuum vessel as expected but onstage in the Headquarters amphitheatre ...



return to the latest published articles