Model of Zero Energy Thermonuclear Assembly (ZETA) made for the Atoms for Peace Exhibition in 1958. (Note: ZETA is sometimes incorrectly expanded as Zero Energy Thermal Apparatus).

In September 1958, the United Nations held a conference aimed at fostering international relations and the use of nuclear energy for peaceful purposes. This conference was called the "Second United Nations International Conference on the Peaceful Uses of Atomic Energy" or "Atoms for Peace". There had been a similar conference two years earlier.

This model of the Zero Energy Thermonuclear Assembly (ZETA) was made for the conference. ZETA was a fusion reactor built at at the Atomic Energy Research Establishment in England, the largest and most powerful of its kind at the time. The results produced by the research using ZETA were considered a breakthrough in the search for unlimited energy during the Cold War, with the Soviet Union also developing nuclear technologies.