Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Neighbours | In goes the antenna

    Just a short distance from the ITER site, the Institute for Magnetic Fusion Research (IRFM) is modifying the Tore Supra plasma facility which, once transformed, [...]

    Read more

  • Remote handling | Off-site test facility for design evaluation

    Through a technical collaboration established between the ITER Organization and the UK Atomic Energy Authority (UKAEA) in 2017, the UKAEA's centre for Remote Ap [...]

    Read more

  • Poloidal field coils | A tailor-made ring

    They work like tailors, carefully taking measurements and cutting immaculate fabric with large pairs of scissors. But they're not making a white three-piece sui [...]

    Read more

  • Fusion world | Record results at KSTAR

    Experiments in the Korean tokamakKSTAR in 2017 achieved record-length periods of ELM suppression by the application of three-dimensional magnetic fields with in [...]

    Read more

  • JT-60 SA| Cryostat ready for Europe-Japan tokamak

    The cryostat vessel body of the JT-60SA tokamakhas been successfully manufactured and pre-assembled at a factory in Spain, and will soon be transferred to the J [...]

    Read more

Of Interest

See archived articles

New equipment for the COMPASS tokamak in Prague

Jan Mlynář, Institute Of Plasma Physics, 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