The Focus Fusion Society › Forums › Dense Plasma Focus (DPF) Science and Applications › Questions about how much energy has to go into a single pulse › Reply To: Some about a fusion dispute in Sweden.
Lerner wrote: The new LPP machine will have a maximum electric input of close to 100 kJ. Our calculations indicate that this is what will be needed to get Q>1. A generator would be similar in energy, but would pulse much more rapidly–500 times a second or so, compared with 6/ hr for the experimental device.
DianaHitech, which was located in NJ, unfortunately went out of business and the device no longer exists. It was never fully built, so I believe the peak current obtained was about 0.9 MA or so. We’ve had several discussions with Dr. Brzosko and the cross arrangement of our device was inspired by his.
By the way, in a generator, some of the electric discharge energy that is not actually absorbed by the plasma can be recaptured by well-designed circuitry, so the energy that needs to be captured from the plasma for break-even is less than 100 kJ.
First, thanks for the direct response..but it really doesn’t answer the concerns regarding the huge discrepancies between your numbers and Dr. Brzosko’s.
That “some of the electric discharge energy” you mention seems like a LOT when you are talking the difference between DianaHitech’s calculated 4GJ and your 100kJ. Unless there’s a volumetric/mass scale issue as I alluded to in my prior post, it seems that *someone’s* calcs are off by a few thousand-fold or some vital background information has been omitted.
[stream of consciousness]
Perhaps the issue could be cleared up if the “W” in those graphs were better defined. Is that energy that must be input by the electric arc each pulse or is that the net total after some energy has been released from fusion events or other input not considered in your calculations? How does it conceivably even build to 4GJ if it has to be delivered electrically in a matter of nanoseconds? Why do they seem to need 4GJ in *their* field and you only need 100kJ? Is that 4GJ perhaps built up over a much longer period of time with “pre-heating” prior to initiating the electrically-driven plasma pulses and thus assumed to be a sort of prior condition in your calcs versus a closed-system calc in theirs?
[/stream]
Thanks in advance for contributing to my nascent education in plasma physics 😉