A new Cooperation Agreement between the international ITER fusion project, the Italian Consorzio RFX and EUROfusion will allow European researchers from eight countries to join the Neutral Beam Test Facility in Padua and work on the world's largest plasma heating system.

ITER Director-General Bernard Bigot: "I am very happy to announce the cooperation agreement recently signed between ITER, RFX and EUROfusion. EUROfusion have made a strong commitment to the ITER NBTF by proposing the support of 20 staff to work at the NBTF in Padua and at IPP Garching. For this support, we are very grateful. We are also convinced that with the collaboration of our European partners, and the scientists and engineers in the European laboratories, NBTF will be a success".

The Cooperation Agreement will see up to 14 experts from across Europe to work on the ITER neutral beam heating system at the Neutral Beam Test Facility (NBTF) in Padua, Italy. Another 6 researchers will support NBTF from the ELISA neutral beam facility in Garching, Germany. Intellectual Property derived from the work will be the joint property of all partners involved. As such, this first agreement will serve as a framework for future collaborations between ITER and the European fusion community.

The new project partners include EUROfusion beneficiaries Max Planck IPP (Germany) with its existing but smaller ion source ELISE, CIEMAT (Spain), Consorzio RFX (Italy), INRNE (Bulgaria), EPFL (Switzerland), IST (Portugal), NCBJ (Poland), the University of Ljubljana (Slovenia); and CCFE (UK).

EUROfusion Programme Manager Tony Donné: "The neutral beam systems being developed at NBTF are the first systems being tested for ITER, so our engineers and scientists being involved here is like them already getting experience with the operation of ITER. Such education and training is one of EUROfusion's main pillars as we work on our Roadmap towards fusion power, and we look forward to helping develop this important technology".

About the Neutral Beam Test Facility

Neutral beam injection is one of the main external plasma heating systems planned for ITER; it will deliver over half of all the planned heating power to the plasma. Neutral beam technology heats the plasma by accelerating beams of neutral atoms into the fusion plasma. Although neutral beam injection is routine in many fusion devices, ITER's size requires several enhancements such as much thicker particle beams and increased particle speed to penetrate far into the core of the plasma.

To develop and test the ITER neutral beam injection system, ITER joined forces with the Italian Consorzio RFX. At the NBTF, researchers and engineers built and are testing two full-size prototypes of ITER's future neutral beam system: SPIDER, the most powerful ion source in the world, and MITICA, the full scale prototype of the ITER neutral beam.

RFX director Piergiorgio Sonato: "I'm particularly pleased to welcome our colleagues from other European fusion laboratories to Consorzio RFX here in Padua. I look forward to promoting the implementation of an international NBTF team to support ITER’s success and the design of Europe’s future demonstration fusion power plant DEMO, which will be the first to produce fusion electricity".

About ITER

The ITER fusion experiment is designed to demonstrate the technical feasibility of fusion as a source of safe and practically inexhaustible low-carbon energy. To reach fusion conditions, ITER will need to heat its fuel of hydrogen isotopes into a 150-million-degree-Celsius-plasma. In comparison even the center of the sun only reaches 15 million degrees Celsius.

Source: EUROfusion
Photo: Inside the faraday cage of the SPIDER ion source. Credit © ITER Organization, http://www.iter.org/

Ten years after the start of construction in August 2010, ITER marked a new chapter in its long history. This historic moment was witnesses by distinguished guests, including French President Emmanuel Marcon, ITER’s Director-General, Bernard Bigot and heads of governments of countries being partners of ITER on 28 July 2020. The pandemic led to a hybrid celebration, both online and in person: the Council of the European Union and the European Commission as Host Member, China, India, Japan, Korea, Russia and the United States were there to join the celebrations.

President Macron, speaking from the Elysée Palace in Paris, defined ITER in terms of its promise. ITER is a promise of peace, he said—the proof that "what brings together people and nations is stronger than what pulls them apart." It is also a "promise of progress and of confidence in science" that, if successful, will be an energy that will "answer the needs of populations in all parts of the world, meet the challenges of climate change and preserve natural resources." And, perhaps above all, ITER is "an act of confidence" in the future. "ITER belongs to the spirit of discovery, of ambition. At its core is the conviction that science can truly make tomorrow better than today."

The first major component has been already installed (i.e. toroidal field coils) and others shipped from all over the world are waiting for their turn to be handled by the team of 3,000 participants.

"As we launch the assembly phase of the ITER machine," said ITER Director-General Bernard Bigot in his introductory address, "we feel the weight of history. It is now one hundred years since scientists first understood that fusion energy was the power source for the Sun and stars and some six decades since the first tokamak was built in the Soviet Union... [...] We feel the need for both urgency and patience. We know we need a replacement for fossil fuels as soon as possible. [...] We are moving forward as rapidly as possible ... If we succeed, it will be worth all the time and effort that have brought us to this point."

Each of the guests presented his/her position or acted on the behalf of their superiors stressing the importance of the device for human efforts in the future, following the introductory speeches of President Macron and Director-General Bigot. The ITER Assembly Hall huge screen and the giant assembly tools were the perfect scenery to depict the unique nature of ITER.

Watch the full video of the event here.
Photo: ITER celebrates assembly; Credit © ITER Organization, http://www.iter.org/
Source: https://www.iter.org/

In the recent newsletter published on the Max Planck Institute for Plasma Physics website you can learn more about the preparation of the Wendelstein 7-X stellarator for the next experimental campaign.

Significant developments refer to the construction elements of the W7-X. Now, the divertor will be water-cooled as opposed to earlier operation with uncooled wall cladding. Thanks to the changes introduced, it will be possible to study plasma at a maximum heating energy of 18 GJ for 30 minutes.

Additionally, the system of plasma heating will be expanded with a new NBI (Neutral Beam Injector) system which is now being extended to two neutral beam injectors with two sources each and a total heating power of 7 MW (particle energy 55 keV) for the injection of hydrogen ions.

For more information on the current work on the Wendelstein 7-X stellarator go to the newsletter available on: https://www.ipp.mpg.de

Photo: Wendelstein 7-X; IPP, Jan Michael Hosan

The JT-60SA assembly was completed at the end of March 2020. This device, located at the National Institute for Quantum and Radiological Science and Technology at Naka in Japan, will be the world’s largest and most advanced tokamak-type facility.

JT-60SA will give an input to the operation of ITER.

To read more technical details of the future operation as well as researchers who contributed to the assembly of the JT-60SA please visit: https://www.ipp.mpg.de

Recent experiments at JET (Joint European Torus, Culham) showed how to spread the heat load across different tiles by moving the 'strike point' (specific divertor tiles which spread the heat). In ITER, the expected heat load will be much higher than at JET that is why all obtained results are very valuable. The article presents the idea how to radiate power before it reaches the divertor tiles with an application of gas seeding.

To read more about this 'win-win' scenario please visit https://ccfe.ukaea.uk

Photo: Internal view of JET
Source: EUROfusion; CC BY 4.0 licence