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

  • FEC 2020 | The virtual experience

    The international fusion community charts the progress of its craft. There was a time, before the invention of the internet, when conferences were the only oppo [...]

    Read more

  • FEC 2020 | Celebrating 60 years of Fusion Energy Conferences

    "It is the year 1958. For the second time, the United Nations have invited the nuclear community to its headquarters in the Swiss capital of Geneva to disc [...]

    Read more

  • FEC 2020 | Women in Fusion event

    Five experts share their experience of entering and evolving in the field of fusion as women, and offer a number of suggestions for reducing the "fusion ge [...]

    Read more

  • FEC 2020 | E-conference opens, participation never higher

    The 28th IAEA Fusion Energy Conference (FEC) is off to an auspicious start. Open to the public for the first time thanks to the technical possibilities of an al [...]

    Read more

  • Vacuum vessel in Europe | Fitting the pieces virtually

    A 'virtual fit' tool developed by the European Domestic Agency is helping the vacuum vessel manufacturing team anticipate the challenge of final assembly—the mo [...]

    Read more

Of Interest

See archived entries

Image of the week

A closer look at KSTAR

Over its twelve years of operation, the KSTAR tokamak (for Korea Superconducting Tokamak Advanced Research) has built an extremely valuable database for the future operation of ITER as well as for the design basis of a next-step DEMO machine.

The KSTAR tokamak and some of its auxiliary systems, seen from the entrance to the hall. (Click to view larger version...)
The KSTAR tokamak and some of its auxiliary systems, seen from the entrance to the hall.
KSTAR is considerably smaller than ITER (with a 1.8-metre major radius as compared to 6.2 metres) and it differs in many design details. The machine achieved high-performance operation mode (H-mode) in 2010 and reached an ion temperature of 100 million °C in 2018. KSTAR has proved especially efficient in suppressing edge localized modes (ELMs), a phenomenon that can occur during H-mode during which bursts of energy and particles are expelled from the plasma.

Along with the European JET, KSTAR has been at the core of an extensive international program to validate the design of an effective disruption mitigation system based on shattered pellets injection—the very system that will be installed in ITER.

A view from the back, looking toward the entrance. One of the shattered pellet injectors that were installed in 2019 is visible in the inserted image. (Click to view larger version...)
A view from the back, looking toward the entrance. One of the shattered pellet injectors that were installed in 2019 is visible in the inserted image.
Let's take a guided tour of the pristine KSTAR hall at the National Fusion Research Institute in Daejeon, Korea.

1-2: Neutral beam injectors #1 and #2
KSTAR is presently equipped with two 110 kV positive-ion-based neutral beam injectors. A third is optional.

3: Power sources
Whereas the power source for neutral beam injector #1 is located in an adjacent building, the three modules of the power source for injector #2 are installed in the KSTAR hall proper.

4: ECEI diagnostics system
The electron cyclotron emission imaging (ECEI) diagnostic is designed to visualize the electron temperature profile and fluctuations in 2D and 3D. In case a third neutral beam injector is installed, the system would be relocated.

6: Vacuum UV diagnostics system
This prototype vacuum ultraviolet diagnostics system uses spectroscopy to monitor transport and accumulation of the tungsten particles in the plasma.

7: Pellet injector
Part of the international program of R&D on ITER disruption mitigation, two shattered pellet injectors were installed in 2019 (one is visible in the inserted image, the other is in a diametrically opposed location).The equipment was provided by US ITER through Oak Ridge National Laboratory.

8: Cryovalves box
Connected to the cryoplant outside the hall, the valves are activated to control the flux of supercritical helium circulating in the magnet system.


return to the latest published articles