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

  • Remembering Bernard Bigot, ITER Director-General 2015-2022

    On the ITER site, the machinery of construction was humming just like on any weekday. Workers were concentrating on their tasks, laying rebar for new buildings [...]

    Read more

  • Tokamak assembly | Preparing for the Big Lift

    The distance was short but the challenge daunting: on Thursday last week, the first section of the plasma chamber was lifted 50 centimetres above its suppor [...]

    Read more

  • Image of the week | 13th toroidal field coil arrives from Europe

    The toroidal field coil procurement effort has been one of the longest of the ITER program, initiated by Procurement Arrangements signed in 2007 and 2008. Manuf [...]

    Read more

  • Diagnostics | Final Procurement Arrangement signed

    ITER Diagnostics reached an important milestone in December 2021 when it concluded the last Procurement Arrangement of the diagnostics program. After signing a [...]

    Read more

  • On site | A quick visit to the Control Building

    Work is progressing on the ITER Control Building, ergonomically designed for the 60 to 80 operators, engineers and researchers who will call it home.  [...]

    Read more

Of Interest

See archived entries

PRIMA gets ready for first neutral beam components

Workers installed the main door of the SPIDER bioshield in April. Sliding along rails, this 120-tonne door will be the point of entry for component installation. (Click to view larger version...)
Workers installed the main door of the SPIDER bioshield in April. Sliding along rails, this 120-tonne door will be the point of entry for component installation.
In the industrial outskirts of Padua, Italy, about 40 kilometres west of Venice, the long white buildings of the PRIMA Neutral Beam Test Facility are now ready to receive equipment, after a little over a year of construction activity.

At PRIMA, the components of ITER's most powerful heating system—neutral beam injection—will be tested in advance of ITER operation.  Europe, Japan and India are contributing all components according to the specifications of Procurement Arrangements signed with the ITER Organization; Italy is building the facility as a voluntary contribution to the neutral beam development program. The PRIMA facility is hosted by Consorzio RFX, an Italian research laboratory for plasma physics and controlled nuclear fusion.

Two test beds at PRIMA will help resolve challenging physics and technology issues and validate concepts before the neutral beam system is built at ITER. The first, SPIDER, will operate an ITER-scale radio-frequency negative ion source. After approximately two years from the start of SPIDER, a second facility, MITICA, will enter operation to test the 1:1-scale neutral beam injector at full acceleration voltage and power.

In Padua, Italy, the PRIMA complex will house the SPIDER and MITICA experiments, as well as facilities for power supplies, cryogenics, and cooling. Europe, Japan and India—which all have significant experience with neutral beam technology—are contributing the components based on specifications provided by the ITER Organization. (Click to view larger version...)
In Padua, Italy, the PRIMA complex will house the SPIDER and MITICA experiments, as well as facilities for power supplies, cryogenics, and cooling. Europe, Japan and India—which all have significant experience with neutral beam technology—are contributing the components based on specifications provided by the ITER Organization.
Fabrication is now underway for all SPIDER components. Factory acceptance tests on the vacuum vessel are planned mid-year in Europe; delivery of the 100 kV power supply and beam dump (part of the Indian contribution) is expected at the end of year according to plan. For MITICA, all of the build-to-print mechanical components have reached the final design stage and were presented for review in January 2014. Following chit resolution, procurement of these components will be launched by the European Domestic Agency.

"This ambitious development program for neutral beam heating will allow us to acquire valuable information about neutral beam manufacturability and operation before we are called on to install and operate two heating neutral beam (HNB) injectors in ITER, as well as the diagnostics neutral beam (DNB)," says Deirdre Boilson, head of the Heating & Current Drive Division at ITER. "Already, as manufacturing for SPIDER is underway, we are learning important technical lessons that will directly serve the manufacturability of the beam sources of the DNB and HNBs."

All of the components for the PRIMA test beds belong to the ITER Organization. Once they've been delivered to the site in Padua and have passed acceptance tests, ownership responsibility will be transferred to the European Domestic Agency for the duration of SPIDER and MITICA operation.

"Neutral beam technology is key for ITER, but also for the next-stage fusion device," says Deirdre. "We're looking forward to PRIMA's experimental results, based on which we'll be able to move forward with full confidence to install and operate the neutral beam injectors on ITER."

Studying negative ion beam technology at ELISE
At the Max Planck Institute for Plasma Science (IPP) in Garching, Germany, experiments underway on a half-size radio-frequency-driven negative ion source, ELISE, have made important contributions to the design of SPIDER and MITICA and to their future operation. In addition to this important research input, the R&D program funded by the European Domestic Agency is also making another important contribution to the neutral beam development program: offering important training opportunities to the scientists and engineers from Consorzio RFX.


Watch a recent video on ELISE from the European Domestic Agency here.


return to the latest published articles