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

  • Inside the pit | From dizzying volume to cramped environment

    There was a time when the assembly pit felt like a huge arena, with toy-like tools scattered on the floor and workers reduced to Playmobil-size figures. Progres [...]

    Read more

  • Fusion world | UKAEA's CHIMERA set to transform fusion component testing

    Construction of a unique testing machine for fusion components is underway at the UK Atomic Energy Authority (UKAEA).  The machine, known as CHIMERA (or Co [...]

    Read more

  • Award | A 30-year friendship with China

    Some thirty years ago, HT-7, China's first superconducting tokamak, was entering operation and experiencing some issues with its ion cyclotron resonance (ICRH) [...]

    Read more

  • Tokamak assembly | Building the feeders, segment by segment

    Through an opening in the Tritium Building just large enough to admit the 11-metre-long components, two magnet feeder segments were introduced this month into t [...]

    Read more

  • Fusion world | Highest French distinction for former ITER Director-General

    Established in 1802 by Napoléon Bonaparte, then the First Consul of the young French Republic, the French Legion of Honour (Légion d'honneur) is the highest of [...]

    Read more

Of Interest

See archived entries

Fusion diagnostics heat up across the US

Six of seven US diagnostic systems are in the preliminary design phase with teams actively investigating physics and engineering issues through testing, prototype development and proof-of-principle activities. Pictured: a corner cube reflector prototype for the toroidal interferometer and polarimeter diagnostic. Photo: PPPL (Click to view larger version...)
Six of seven US diagnostic systems are in the preliminary design phase with teams actively investigating physics and engineering issues through testing, prototype development and proof-of-principle activities. Pictured: a corner cube reflector prototype for the toroidal interferometer and polarimeter diagnostic. Photo: PPPL
The ITER tokamak will have over 60 diagnostic systems installed to enable plasma control, optimize plasma performance and support machine protection.

Two US laboratories, the Princeton Plasma Physics Laboratory (PPPL) and the Oak Ridge National Laboratory (ORNL) in collaboration with industry and universities, are developing the US contributions to ITER diagnostic systems. At this point, six of seven US diagnostic systems are in preliminary design with teams actively investigating physics and engineering issues through testing, prototype development and proof-of-principle activities.

"ITER diagnostics will use well-established techniques that are operational on tokamaks around the world. The challenge is designing systems that can withstand the harsh ITER operating environment," said US ITER diagnostics team leader Russ Feder of PPPL.

The first tokamak designed to sustain burning plasma, ITER will operate with pulse lengths up to an hour; diagnostic systems will potentially be exposed to high magnetic fields, neutron flux, and intense heat.

"ITER will also shake and move a lot. So we have to plan for vibrations and alignment challenges. This makes the physics and the engineering very interdependent," Feder said. "We have made major progress this year across six systems."

All of these diagnostic systems will feed information to ITER operators and scientists. One reason ITER has so many diagnostics is to provide redundant systems using different tools for measurement of similar plasma characteristics, confirming measurement accuracy.

Right now, teams are working on diagnostic systems across the US. Prototypes and testing are underway, with major recent progress occurring on the electron cyclotron emission diagnostic, the toroidal interferometer and polarimeter, and the upper infrared cameras.

Read the full story on the US ITER website.


return to the latest published articles