Of Interest archive

Fusion scientists keep looking for ways to address the challenge of plasma disruptions, which can halt fusion reactions and potentially damage the plasma-facing components of a fusion device.

Researchers at the Princeton Plasma Physics Laboratory (PPPL) and the University of Washington have developed a prototype device to control plasma disruptions. The electromagnetic particle injector, EPI, is a type of railgun that fires a high-velocity projectile, a sabot, from a pair of electrified rails into a plasma that is on the verge of disruption. The sabot releases light-metal pellets into the centre of the plasma that would spread out the energy of the disruption from the centre of the plasma to the edge, thus weakening its impact on the vessel walls.

The EPI can deliver the pellets more deeply into the plasma than other techniques. For physicist Roger Raman of the University of Washington, the primary advantage of the new device is "its potential to meet short-warning time scales." Pellets should be delivered in less than 20 milliseconds from the warning of a disruption, with 10 milliseconds as ideal. During tests, the EPI delivered pellets in less than 10 milliseconds. In comparison, the gas-propelled system needs 30 milliseconds.

Read the full article on the PPPL website, which includes a slow-motion video of an EPI shot.

(Photo by Elle Starkman)

The 56h Culham Plasma Physics Summer School is open to applications.

The school will cover fundamental plasma physics,  together with a broad understanding of its fields of application. No previous knowledge of the subject is expected, but familiarity with electromagnetism and applied mathematics at first degree level is recommended. Lecturers are drawn from the Culham Centre for Fusion Energy (CCFE), the Rutherford Appleton Laboratory (RAL) together with leading European universities. All are renowned experts in their fields.

For more details and to apply please visit: https://culhamsummerschool.org.uk/

Discount for early registrations before 15 May.

The deadline for applications is 25 May.

Researchers at the Los Alamos National Laboratory in the United States have developed thin films made of a tungsten alloy that could be used inside fusion reactors. The material, a nanocrystalline tungsten-tantalum-vanadium-chromium alloy, showed "outstanding radiation resistance when compared to pure nanocrystalline tungsten materials," said researcher Osman El Atawi in an article published in The Engineer.

The inside of a fusion reactor vessel faces the hot plasma and must withstand extremely high temperatures as well as bombardment by charged and neutral particles. Tungsten, which is currently considered the most suitable material to protect the inside of a vacuum vessel, tends to fracture after radiation, while the newly developed alloy material retains its mechanical properties.

Osman El Atawi (left) and Enrique Martinez collaborated with researchers from several scientific institutes in the United States, Poland and the United Kingdom. Their joint paper is published in Science Advances.

What do you get when you mix three parts fusion doctoral training, two measures of outreach, many parts of information, and a final jigger of fun?

A Glass of Seawater!—a self-described "light, informative, and inspiring podcast all about the field of fusion energy research as seen through the eyes of PhD students from FUSION CDT*."

Now in its third season, the podcast takes on all kinds of nuclear fusion/plasma physics topics from, as the organizers are happy to admit, a "glass half full" perspective. What is incredibly hard—but also exciting—about research in fusion today? Which challenges have been overcome and which remain? What are the latest developments from the world of materials science? And—last but not least—how much fuel for the fusion reaction can be taken from a glass of seawater?

Tune in to Andrew, Bhavin, William and their many guests here, or look up A Glass of Seawater! on Facebook and Twitter.

Also, see this recent write-up from EUROfusion.

Five UK universities—Durham University, University of Liverpool, University of Manchester, University of Oxford, University of York—have joined within FUSION CDT to offer doctoral training in fusion-relevant disciplines such as plasma physics, material science, nuclear physics, technology, laser physics, and instrumentation. Learn more here.

Established in December 1893, the monthly L'Usine nouvelle ("The New Factory") is one of the oldest French trade magazines. To celebrate its 125th anniversary, the magazine organized a major travelling photography exhibit that will be presented at several engineering schools in France and eventually, in 2020, at the Palais du Luxembourg—home of the French Senate in Paris.

"Industry seen from above" brings together spectacular aerial photographs of industrial installations and infrastructure in France and abroad. And ITER is one of them.

The organizers chose a composite photo created by ITER contractor Emmanuel Riche from several drone views of the ITER site taken at dusk in December 2017. The resulting "planet"—centred on the Tokamak Building and its circular bioshield, with cranes jutting out at the "equator"—is one of the most spectacular renditions of the ITER site, in both its artistic and its documentary approach.

A photo of a specimen of tungsten-fibre-reinforced tungsten after a stress test won the first prize in science publisher Elsevier's "NuMart Image Competition". Johann Riesch and colleagues at the Max Planck Institute for Plasma Physics (IPP) developed the composite material as part of the search for materials that could be used at high-stress locations in fusion plasma vessels.

Although tungsten is the metal with the highest melting point, it is highly brittle and develops cracks under punctual stresses. Taking their cue from fibre-reinforced ceramics, Riesch and his team developed tungsten-fibre-reinforced tungsten where tungsten fibres with a diameter of 150 micrometres bridge the cracks in the tungsten matrix.

The photo taken by Martin Balden shows the new material after a breaking test as seen by an electron-microscope, demonstrating how the fibres enhance the fracture toughness of the tungsten material. The image will feature on the cover of the jubilee issue of Elsevier's Journal of Nuclear Materials, which will be published in April 2019, marking its 60th anniversary.

See the full article on the IPP website here.

The sequel of the ITER manga is out. Taiyô Tenno, the young Japanese art student who had visited Provence and had been introduced to ITER by French scientist Soléane, has returned to France. He spends his summer vacation as an intern at ITER's Communication Department where he and his two intern colleagues are tasked to come up with an idea of how to reach out to people all over the world and spread the word about ITER.

Taiyô meets Soléane again who introduces him to ITER's Deputy-Director Eisuke Tada. During a weekend walk on the Sainte Victoire mountain near Aix-en-Provence with Mr. Tada, Taiyô learns about the diversity at ITER, with experts coming from all over the world, sharing ideas in an open and frank atmosphere. Taiyô is inspired and returns to work full of ideas.

To find out how the story ends, read the new installment "A small sun on Earth. Volume 2: Internship chapter" published by ITER Japan. It is available in Japanese, English and French.

Download the manga on the ITER Japan website here or directly from the ITER Publications page (Comics).

A two-year campaign to test the resistance of EUROFER97 steel, financed by the European Domestic Agency, has just ended at the Nuclear Research and Consultancy Group (NRG) of the Netherlands.

The European Domestic Agency, Fusion for Energy, will be using a new kind of steel—EUROFER97—in its test blanket module program for its ability to resist high heat fluxes and neutron activation. In 2015, the agency contracted with Studsvik (Sweden) and its subcontractor NRG to study the performance of the steel after irradiation in conditions similar to those expected at ITER. Four irradiation campaigns with EUROFER97 steel samples have now been carried out in NRG's High Flux Reactor in Petten and the samples will undergo full analysis at Studsvik for brittleness, material strength, and microscopic changes.

Read the article in World Nuclear News.

A recent public hearing organized by the Budgetary Control Committee of the European Parliament has shed a light on the significant impact of ITER in terms of economic benefits and job creation.

According to Massimo Garribba, Director at the Commission's Directorate-General for Energy, ITER has produced almost EUR 4.8 billion in gross value added and almost 34,000 "job years" over the period 2008-2017 through the award of over 900 contracts and grants in 24 countries of the European Union.

European companies report that working for ITER generates a new knowledge base, offers new business opportunities and increases their competitiveness and growth, helping to create additional jobs.

Read the details on the Fusion for Energy website.

Thousands of live webcams throughout the world provide viewers with spectacular natural vistas, cityscapes and beaches, trendy bars and colourful markets in real time. Every year the EarthCam network, a website that collects webcams from thousands of sites across the globe, selects 25 of the most interesting views offered to the public.

As expected, webcam #1 in 2018 was pointed at a beautiful natural scene—the Arenal volcano in Costa Rica which, until a few years ago, was one of the most active in the world. There were also cats among the first tier of the awardees.

The surprise however came with webcam #18, the Remote Glow Discharge Experiment (RGDX) at the Princeton Plasma Physics Laboratory (PPPL), over which the EarthCam editors confessed they were "geeking out."

The RDGX allows viewers to turn on a plasma and change the gas pressure, the voltage, and the strength of the electromagnets from any place in the world.

Along with a webcam focused on a light bulb that has been shining at the Livermore, California, Fire Department for... 117 years ... and an interactive robot-controlling cam in Oakland, also in California, Princeton's RDGX is the only science- and technology-oriented webcam to make the first "25 most interesting webcams" in the world.

Read the original article on the PPPL website.

At the Culham Centre for Fusion Energy (CCFE), researcher Fulvio Militello is working on a statistical model that compares the seemingly random movement of filaments (structures that emerge at the edges of the hot plasma) to the behaviour of raindrops. In the same way that each unique raindrop follows the same laws of physics (they hit the pavement), filaments that differ in strength, speed, size, amplitude or position follow certain rules as they move. Militello's model estimates collective behaviour in order to give scientists a tool to predict and control them. Read more about his theory on the CCFE website.

In working with data from the DIII-D tokamak, physicists Ahmed Diallo and Julien Dominski from the Princeton Plasma Physics Laboratory (PPPL) have uncovered a trigger for a particular type of ELM—fiery bursts of plasma called Edge Localized Modes—that does not fit into present models. Their findings could shed light on the variety of mechanisms leading to the onset of ELMs and could broaden the portfolio of ELM suppression tools. Read the full report on the PPPL website.

On October 9 2014, fusion research bodies from European Union member states and Switzerland signed an agreement to cement European collaboration on fusion research and EUROfusion—the European Consortium for Development of Fusion Energy—was born. EUROfusion supports and funds fusion research activities on behalf of the European Commission's Euratom program. Today, there are 30 participating research organizations and universities from 26 European member states plus Switzerland and the Ukraine.

Beginning this month, Ambrogio Fasoli replaces Jérome Pamela as the Chair of EUROfusion's decision-making body, the General Assembly. Jérome Pamela had been in the role since January 2015.

Challenges ahead for the new Chair include the transition to the next European research and innovation framework program, Horizon Europe; navigating the uncertainties linked to Brexit; and the strategic direction of EUROfusion as it pursues the objectives laid out in the European Roadmap to Fusion Electricity.

Read interviews of the incoming and outgoing Chairs on the EUROfusion website.

See an on-line biography of the new Chair on the EPFL website.

Every year in December, the annual meeting of the Fusion Power Associates brings together senior representatives of the US and international fusion communities and US policymakers to review the status of fusion research and consider the way forward.

The 39th annual meeting, organized in Washington D.C. on 4-5 December 2018 on the topic of "Strategies and Expectations Through the 2020s," was no different—representatives from US government and US national labs and universities mixed with representatives from programs in Canada, China, Germany, Japan, Korea, the United Kingdom and, of course, ITER to review the fusion research landscape and promising paths to fusion energy.

All presentations from the 39th Annual Meeting can be downloaded here.

Researchers at the Princeton Plasma Physics Laboratory in the US are reporting findings that can be beneficial to ITER, says John Greenwald on the laboratory's website.

Results published by theoretical physicist Allan Reiman and his colleague Professor Nat Fisch in Physical Review Letters focus on so-called tearing modes—instabilities in the plasma that create magnetic islands, which are a key source of plasma disruptions.

Currents driven by radio frequency waves in the interior of these magnetic islands can stabilize deleterious tearing modes, an effect that is augmented by small perturbations in the plasma's temperature.

"When the power deposition in the island exceeds a threshold level, there is a jump in the temperature that greatly strengthens the stabilizing effect," says Reiman. "This allows the stabilization of larger islands than previously thought possible."

Read the full report on the PPPL website.

Physicists Allan Reiman, left, and Nat Fisch. (Photos by Elle Starkman)

Registration is open now for the 2019 edition of the ITER Business Forum (IBF/2019) to be held in Antibes, France from 26 to 28 March.

At IBF/2019, representatives of the ITER Organization, the Domestic Agencies, and main suppliers will be making presentations on industrial involvement in the project, procurement opportunities, and main future calls for tender.

In specific thematic sessions, registered delegates will have the opportunity to meet potential partners or subcontractors at the French, European or international level. A 1-1 meeting schedule tool is also available on line for all registered companies.

To find out more about the conference, to register to participate, or to reserve a stand, please see the IBF/2019 website.

Like mountaineers at the foot of Mount Everest, spacefaring nations have aimed for the Moon "because it's there." Now, close to 60 years after the first object from Earth landed (or more accurately "crashed") on the surface of our satellite and half a century after Apollo 11 gently deposited two men on the Sea of Tranquility, there are very concrete incentives to 21st century lunar exploration.

And one of these incentives has to do with the future of fusion.

Research today is essentially focused on the fusion of hydrogen isotopes deuterium and tritium, which is the "easiest" to achieve with our present technological capabilities. However, other energy-producing combinations of light nuclei are theoretically possible, a few of which involve the helium isotope 3 (3He). Fusing 3He with itself or with deuterium offers the immense advantage of not producing neutrons and hence avoids activating materials in the fusion chamber.

Carried by solar wind, 3He is prevented from reaching the surface of our planet because of the magnetic field that protects it. On the Moon however, where the magnetic field is considerably weaker, large quantities of 3He have accumulated close to the surface. For many years, some scientists, politicians, and private companies (and even a former Apollo astronaut) have made the argument for "mining the Moon" for 3He. Other scientists argue that mining the Moon for 3He is pure ... moonshine.

Despite the controversy, 3He recently made headlines in relation with the recent landing of the Chinese rover Chang'e 4 on the dark side of the Moon. Professor Ouyang Ziyuan, the Chief Scientist of the Chinese Lunar Exploration Program, was widely quoted saying that a long-term industrial program to mine the Moon for 3He was economically justified.  "The moon is 'so rich' in helium 3," he said, "that it could solve humanity's energy demand for around 10,000 years at least."

Photo: The Chang'e 4 module landed on the dark side of the Moon on 3 January 2019.

The US National Academies of Sciences, Engineering, and Medicine has completed a multiyear study of the overall status of magnetic confinement fusion research in the United States. Its recommendation? Continued US participation in the ITER Project and an unambiguous increase in funding for the domestic fusion program leading to the construction of a compact pilot plant.

The Final Report of the Committee on a Strategic Plan for Burning Plasma Research was the latest in a number of steps undertaken by policymakers in the United States to evaluate the state of domestic fusion research—including current and planned participation in international programs—and to develop a strategic plan for the future.

The final report issued in December 2018 makes two recommendations:

• The United States should remain an ITER partner as the most cost-effective way to gain experience with a burning plasma at the scale of a power plant.
• The United States should start a national program of accompanying research and technology leading to the construction of a compact pilot plant that produces electricity from fusion at the lowest possible capital cost.

See the press release for more information or to download the full report.

A new simulation tool helps scientists to understand how a tokamak would look during a fusion experiment. Research Software Engineer Alex Meakins of the Culham Centre for Fusion Energy (CCFE) in the UK has created a series of computerized images of the JET tokamak rendered in glass with the help of CHERAB, a simulation tool that combines plasma modelling with a powerful photo-realistic ray-tracer. This technique traces the path of light through a virtual world and predicts the effects of light bouncing off objects.

CHERAB helps address a long-standing problem for fusion diagnostics—the interference of light reflection from the metal surfaces inside a tokamak's vacuum chamber with the ability to make accurate plasma measurements.

Read the full article published by CCFE here.

On 3 December, over 1,100 ITER staff, contractors, partners, families and friends celebrated the end of 2018 as a successful year for the ITER Project and its mission to create clean and safe energy for the future.

Opening the evening at the Grand Théâtre de Provence in Aix-en-Provence, ITER Director-General Bernard Bigot told the audience that "our progress is the result of hard work, creative problem-solving and strong commitment on the part of every member of the ITER Team."

The highlight of the evening was the show of the award-winning shadow dance team Die Mobilés from Germany, whose masterful play with shapes, light and music took the audience on a tour to ITER Member countries around the world and through a short history of film. With astonishing creativity and as a special surprise for the audience, the artists brought ITER to life on stage—including a depiction of a busy worksite and a Tokamak model.

See a video clip from the show here.

Registration is now open for the 10th ITER International School, which will take place in Daejeon, Korea, from 21 to 25 January 2019. The registration fee for foreign students of KRW 340,000 (equivalent to around EUR 265, VAT included) includes accommodation, lunches and dinners, and bus service between the hotel and the school.

The ITER International School aims to prepare young scientists/engineers for work in the field of nuclear fusion and in research applications associated with the ITER Project.

The 10th edition, to be held at the Korea Advanced Institute of Science and Technology (KAIST) in Daejeon, is organized around "The Physics and Technology of Power Flux Handling in Tokamaks." This subject has an interdisciplinary character: power flux handling in tokamaks is key challenge for the development of nuclear fusion, but one that can only be resolved through the integration of physics-based approaches to decrease power fluxes on the tokamak wall together with technological developments for tokamak wall components.

For more information or to register, please visit www.iterschool2019.kr.