I’ve had a quick skim through the list of devices given, most are little more than historical curiosities now, on the road of how magnetic, and inertial confinement machines have developed over the years.
Most designs were build to investigate a particular regieme of plasma behaviour, and were never thought as serious energy producing canidates.
The only mention of Dense Plasma Focus devices is a one line entry in the table under the Z and theta pinch section with a date range of 1965-1970, with a reference to a book published in 1981. Given this article was written in 2005 when there were plently of DPF research machines around the world highlights the fact that DPFs are not well known in the mainstream fusion community.
An interesting part of the overview is the graphs of funding, which increase steadily upto 1983, then as the oil price was so cheap then the funding level dropped off again. We can now see over the past few years since the oil prices have gone up again a renewed interest in fusion. If only the policy makers could have been a little more longsighted and realised it was a long term investment and that to make progress they should have kept up the funding levels for the past 30 years.
Focus Fusion Society 
