Enable Recite

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

  • Cryoplant | First steps toward commissioning

    Every week since the beginning of November, a tube trailer filled with approximately 4,600 cubic metres (750 kg) of compressed gaseous helium delivers its load [...]

    Read more

  • Training | Seeking the next group of Monaco-ITER Fellows

    Recruitment opens for the next Monaco-ITER Postdoctoral Fellowship campaign on 17 January 2022. If your PhD was awarded after 1 January 2019—or you are about to [...]

    Read more

  • Contemporary art | Venet's "arcs" are as heavy as ITER coils

    A 'conceptual artist' among the most prominent on the art scene today, Bernar Venet is not impressed by massive towering steel structures like those in the ITER [...]

    Read more

  • Image of the week | Final activities on Europe's first sector

    The first vacuum vessel sector produced in Europe will arrive at ITER next year. Five of ITER's nine vacuum vessel sectors are the responsibility of Europe's AM [...]

    Read more

  • Vacuum vessel sector preparation | Lessons learned reduce work time by half

    In life as in the assembly of the ITER machine, 'lessons learned' are what makes progress possible. Gains in wisdom, time, skill, investment can be incremental; [...]

    Read more

Of Interest

See archived entries

New equipment for the COMPASS tokamak in Prague

The powerful neutral beam injector that will take the COMPASS tokamak to new regimes. (Click to view larger version...)
The powerful neutral beam injector that will take the COMPASS tokamak to new regimes.
On 10 November, 2010, two trucks from the Siberian city of Novosibirsk rolled up to the COMPASS tokamak at the Institute of Plasma Physics in Prague. The trucks unloaded box after box of high-tech components that had been shipped from the Russian Budker Institute of Nuclear Physics. A team of experienced technicians and physicists arrived from the Institute one week later. Their mission? To assemble and commission two powerful neutral beam injectors that will allow plasmas in the COMPASS tokamak to reach temperatures ten times higher than previously achievable.

The Budker Institute of Nuclear Physics crafts neutral beam injectors for research centres all over the world, tailored each time to in-situ requirements. For COMPASS, the neutral beam injectors have been designed to deliver up to 300 kW of power to the plasma (one hundred times greater than the power of an electric oven) through a narrow aperture of 5 cm for as long as 0.3 sec. In addition, beam modulation—where the neutral beam is switched on and off in a rapid sequence—is planned for measuring plasma characteristics, by directly comparing phenomena inherent to the plasma with phenomena induced by interaction of the injected beam and the plasma.

In COMPASS, two configurations will be possible. Either the neutral beam injectors will deliver parallel beams to the plasma—maximizing the heating effect—or they will inject beams in opposite directions to balance the force momentum on the plasma and keep plasma rotation very low. This flexibility considerably increases the plasma research possibilities on the COMPASS tokamak.

At present, without the heating beams, the COMPASS tokamak can reach plasma temperatures of several million Kelvin. With the two new neutral beam injectors, we expect to reach 50 million Kelvin—a record both for the Czech fusion research and for the COMPASS tokamak.


return to the latest published articles