And it may indeed be the case that their technique, which involves banging together the nuclei of deuterium atoms (a heavy form of hydrogen) using a tiny crystal in a palm-sized vacuum chamber, will never provide a source of power.
In a vacuum it can fire a plasma blob at nearly 150km a second fast enough to initiate fusion in a deuterium and tritium fuel.
Its pressurised heavy-water reactors, known as CANDU, are similar to ordinary pressurised-water reactors (or light-water reactors, as they are sometimes known) but they contain water in which the hydrogen atoms have been replaced by their heavier cousins, deuterium.
The neutrons are generated by bombarding a heavy form of hydrogen, called tritium, with a lighter isotope of the gas, called deuterium.
The figure of 5% agrees with an earlier analysis based on the amount of a form of heavy hydrogen called deuterium that was produced in the Big Bang.
The fusion of deuterium and tritium into helium in this way releases energy enough of it, in theory, both to power the reactor and to yield a surplus that can be converted into electricity.
Deuterium (along with an even heavier hydrogen isotope called tritium, which is made by bombarding either deuterium or lithium with neutrons) is injected into the doughnut, heated to the point at which its electrons break free and it forms a plasma, and squeezed by magnetic fields.In this section Next ITERation?
These increase the beams' power 15,000 times and push their wavelengths into the ultraviolet.The pellet itself contains a sphere of deuterium (a heavy form of hydrogen, with nuclei consisting of a proton and a neutron) and tritium (even heavier hydrogen, with a proton and two neutrons) that is chilled to just a degree or so above absolute zero.
The hollow plutonium pits in some warheads have a channel for injecting a mixture of deuterium and tritium gas to boost the fission process and thereby reduce the actual amount of fissile material needed.
By counting the neutrons and measuring the X-rays the researchers estimate that about 1,000 pairs of deuterium nuclei were fusing every second.This is, as they are the first to admit, a long way from producing a significant amount of energy.
When two deuterium nuclei (each composed of a proton and a neutron) fuse, the result is a type of helium composed of two protons and a neutron, a free neutron, and a lot of energy.
