The gas pressure has been increased 3 to 5 times over previous work.
The chart indicates that with pressures increased 3 times and with aligned pins that 30-100 times the neutron yield would be expected if the early results continue the linear relationship.
This correlation, which continued on the second day of firing, is significant for two reasons. Its straightness on the log-log plot shows that fusion yield is increasing steadily almost with the cube of pinch height. These act like an arrow on a map, pointing to what the best yields at this current are likely to be. With the largest typical voltage spikes at 50 kV, fusion yields should be over 1 joule (about 1012 neutrons), exactly what our theory projects. The agreement of our theoretical projection with the extrapolation of the experimental curve gives us increased confidence in both. Second, this tightness of the correlation implies a more repeatable operation of FoFu-1 with its newly realigned tungsten pins (see below for details on the latest refurbishing). Of course, these preliminary results must be confirmed with more shots, but they are encouraging.
Since atmospheric pressure is around 760 Torr, this is fusion at roughly 10% of atmospheric pressure, truly putting the "dense" in dense plasma focus. For comparison, a tokamak fusion machine generally operates at just one thousandth of a single Torr. The shock wave from a blast of fusion at 75 Torr caused a glass window to break, but its quartz replacement should be able to take the pressure.
A Dense Plasma Fusion (DPF) collaboration has been formed with fifteen experienced DPF researchers from Europe, Asia and the United States.