engineering

ITER

ITER is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand ITER rather than just read about it. In short: ITER (originally an acronym for International Thermonuclear Experimental Reactor, and also meaning "the way" or "the path" in Latin) is an international nuclear fusion research and engineering project designed to demonstrate the feasibility of fusion power. The facility is under construction near the Cadarache research center in southern France.

Key takeaways

ITER belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect ITER to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of ITER from memory before moving on to harder problems.

Reference excerpt

ITER (originally an acronym for International Thermonuclear Experimental Reactor, and also meaning "the way" or "the path" in Latin) is an international nuclear fusion research and engineering project designed to demonstrate the feasibility of fusion power. The facility is under construction near the Cadarache research center in southern France. ITER has been under construction since 2013. It is expected to achieve first plasma in 2033–2034, at which point it will be the world's largest fusion reactor, with a plasma volume about six times that of Japan's JT-60SA, previously the largest tokamak. The long-term goal of fusion research is to generate electricity; ITER's stated purpose is scientific research, and technological demonstration of a large fusion reactor, without electricity generation. ITER's goals include to achieve fusion energy gain factors (Q, the ratio of thermal output power as thermal power absorbed by the plasma) of Q = 10 momentarily and Q = 5 at steady state; to develop fusion power technologies including superconducting magnets, cryogenics, heating, control and diagnostics systems, and remote handling; to study burning plasma; to test tritium breeding; and to demonstrate the safety of a fusion plant. ITER is funded and operated by seven member parties: China, the European Union (EU), India, Japan, Russia, South Korea and the United States. In the immediate aftermath of Brexit, the United Kingdom continued to participate in ITER through the EU's Fusion for Energy (F4E) program until September 2023. Switzerland participated through Euratom and F4E until 2021, though it is poised to rejoin in 2026 following subsequent negotiations with the EU. ITER also has cooperation agreements with Australia, Canada, Kazakhstan and Thailand. Construction of the ITER complex in France started in 2013, and assembly of the tokamak began in 2020. The initial budget was close to €6 billion, but the total price of construction and operations is projected to be from €18 to €22 billion; other estimates place the total cost between $45 billion and $65 billion, though these figures are disputed by ITER. Regardless of the final cost, ITER has already been described as the most expensive science experiment of all time, the most complicated engineering project in human history, and one of the most ambitious human collaborations since the development of the International Space Station (€100 billion or $150 billion budget) and the Large Hadron Collider (€7.5 billion budget). ITER's planned successor, the EUROfusion-led DEMO, is expected to be one of the first fusion reactors to produce electricity in an experimental environment.

Background

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with ITER

Start with the simplest possible case. Write down what ITER claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to ITER before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about ITER ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of ITER

In research: ITER appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses ITER in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: ITER is common in secondary-school and first-year university syllabi. It links to neighbouring topics Buildings and structures in Bouches-du-Rhône, ITER, International science experiments, so understanding it makes those chapters shorter.
In everyday life: Look for ITER outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study ITER in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what ITER means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain ITER out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is ITER in simple terms?

Why does ITER matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study ITER?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on ITER.