Is it any wonder then, that fusion researchers are looking for more efficient fusion machines?
The neutron source can be a nuclear fusion machine or a particle accelerator producing neutrons by spallation.
Toroidal fusion machines contain a hot ionised gas (plasma) in a complex magnetic field.
By the mid-1950s it was clear that the simple theoretical tools being used to calculate the performance of all fusion machines were simply not predicting their actual behaviour.
It was the ultimate device in a series of UK designs using the Z-pinch confinement technique, and the first large-scale fusion machine to be built.
Analysis of the structure and sequence of several different env genes suggests that Env proteins are type 1 fusion machines.
This fusion machine, this CTR as you call it, is the key to your race's future.
You are trapped in this chamber, while I shall destroy your fusion machine.
For instance, the fusion machine now proposed for Princeton has scaled back its goals and its cost, to around $400 million.
Over the decades scientists have built successively larger fusion machines of increasingly great complexity.