Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Summer postcards from the ITER worksite

    The latest harvest of ITER construction photos may be taken from the same point—the tallest crane on site—but there is always an abundance of new detail to be g [...]

    Read more

  • The ring fortress

    ITER'ssteel-and-concretebioshield has become the definingfeature of Tokamak Complex construction. Twolevels only remain to be poured (out of six). It is a 'rin [...]

    Read more

  • The wave factory

    A year ago, work was just beginning on the steel reinforcement for the building's foundation slab. The Radio Frequency Heating Building is now nearing the last [...]

    Read more

  • It's all happening inside

    Since the giant poster was added to the Assembly Hall's completed exterior in June 2016 the building has lookedfrom afar like a finished project. Butinside, tea [...]

    Read more

  • Along skid row

    They look like perfectly aligned emergency housing units. But of course they're not: the 18 concrete structures in the ITER cryoplant are massive pads that will [...]

    Read more

Of Interest

See archived articles

India signs two R&D contracts

-Sabina Griffith

The signature between ITER India and the American Continental Electronics Corporation marked the start for R&D on future radio frequency technology. (Click to view larger version...)
The signature between ITER India and the American Continental Electronics Corporation marked the start for R&D on future radio frequency technology.
The Indian Domestic Agency has signed two contracts for the development of the radio frequency sources forming part of ITER's ion cyclotron heating and current drive (IC H&CD) system. The contracts were signed with the American company Continental Electronics Corporation and with Thales Electron Devices, France.

The IC H&CD system is one of the major tools for achieving the plasma performances foreseen in ITER's operation scenarios. This system is designed to provide 20 MW into the plasma, at frequencies included in the band 40 MHz to 55 MHz. ITER India is in charge of the procurement of the radio frequency source subsystem and the corresponding Procurement Arrangement was signed in February 2010. A total of nine radio frequency sources will be provided: eight sources used for plasma operation, plus one spare.

For ensuring 20 MW power availability for plasma operation, 24 MW is required at the output of the transmitter at frequencies up to 65 MHz. As there is no unique amplifier chain able to meet the output power specifications, the layout consists of two parallel four-stage amplifier chains, with a combiner circuit on the output side. This kind of radio frequency source will be unique in terms of its stringent specifications and building a first of its kind is always a challenge.

The French company Thales Electron Devices is the second contract partner to develop the most reliable technology for building ITER's amplifier chain. (Click to view larger version...)
The French company Thales Electron Devices is the second contract partner to develop the most reliable technology for building ITER's amplifier chain.
Each amplifier chain is made of a wide band solid state amplifier cascaded to a three tube based tuned amplifier: a pre-driver, followed by a driver stage and a final stage. In this configuration, the final stage tubes have to achieve challenging power levels.

Only two suppliers worldwide are able to reach the target. In order to identify the best and most reliable technology for building this amplifier chain, R&D contracts were signed with both companies. Results are expected by the end of next year followed by the Preliminary Design Review.



return to the latest published articles