Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Worksite postcards | Under fog and autumn light

    Due to its proximity to the Durance River and to the narrow gully spanned by the Bridge of Mirabeau, the area around ITER often experiences a peculiar meteorolo [...]

    Read more

  • Assembly Hall | Another massive paint job

    By the end of December, the massive painting job in the Assembly Hall will be complete and the building's floor will be as white and pristine as the landscape i [...]

    Read more

  • ITER India | Testing a neutral beam for diagnostics

    Every 23 seconds during fusion operation, a probe beam will penetrate deep into the core of the ITER plasma to aid in the detection of helium ash—one of fusion' [...]

    Read more

  • Welded attachments | Follow the laser projections

    How do you position 150,000 welded attachments on to a vacuum vessel the size of a house, each one needing to be accurately placed to less than a 4 mm target? [...]

    Read more

  • Visit | Our neighbour the Nobel

    In 2018, the Nobel Prize in Physics was awarded to Gérard Mourou for his work on ultra-short, extremely high-intensity laser pulses—the so-called 'chirped pulse [...]

    Read more

Of Interest

See archived entries

Shooting selected pellets into the plasma

Lynne Degitz, US ITER

The US ITER pellet injection team has designed and fabricated a new dual nozzle test article that will support both fuelling pellets and ELM pacing pellets in the ITER Tokamak. (Click to view larger version...)
The US ITER pellet injection team has designed and fabricated a new dual nozzle test article that will support both fuelling pellets and ELM pacing pellets in the ITER Tokamak.
ITER will require significant fuelling capability to operate at high density for long durations. Pellet injection provides efficient core and edge fuelling of deuterium or a deuterium/tritium mixture; the system will also deliver deuterium pellets to the plasma edge to mitigate edge localized mode instabilities (ELMs).

The US ITER pellet injection team based at Oak Ridge National Laboratory (ORNL) has designed and fabricated a new dual nozzle test article that will support both fuelling pellets and ELM pacing pellets in the ITER Tokamak.

The article was manufactured by Apollo Corporation in Wartburg, Tennessee. The component features shut-off nozzles which permit the selection of 5 mm fuelling pellets or 3 mm ELM pacing pellets; it is also possible to adjust the pellet length in order to tailor the amount of fuel or ELM pacing material delivered to the plasma.

A test stand at the ORNL Pellet Lab is being prepared and testing of the component will occur later this year. In the ITER machine, the pellets cut from the dual nozzle assembly will travel through the pellet selector to the pellet guide tubes, which direct fuelling and ELM pellets to specific areas of the plasma.


return to the latest published articles