(Project C - MDE - Focus Fusion) - LPPFusion achieves minimum goal of $400 K

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LPPFusion achieves minimum goal of $400 K

We have achieved our minimum crowdfunding goal of $400,000! The Wefunder effort has now $418,125 in investments from 189 investors. This means that we will definitely receive this money for our research when the crowdfunding campaign ends. We are continuing the campaign on towards our maximum goal of $ 1 million.

- Eric J. Lerner, December 23, 2017

Craig Vom Lehn:
When do you expect to close this fundraise?

Eric J. Lerner, December 9, 2017:
We must close it by May 9. But we hope to raise the maximum goal of $1.07 million well before that, and will close it then.

Jean Pierre Demailly:
How far are the present DPF results in terms of the Lawson criterion to reach break-even and, ultimately, electricity production viability? What quantitative improvements of parameters (e.g. density) are needed to reach that goal? What technological steps do you plan to implement to reach the required parameters?

Eric J. Lerner, December 9, 2017:
The answer is a bit technical. Right now, in terms of Lawson’s product of density, confinement time and temperature, we are at around 3x10^14 keV/cm^3. Our goal for net energy, what is needed for power production, is around 2 x10^18 keV/cm^3, so that is a factor of 6,000 bigger. The confinement time we have, at only 30 ns, is still all we need. The T is now 250 keV and we expect it to rise to 600 keV simply due to the energy from fusion reactions, so that is not a concern either. The density has to go up by about 3,000—that is the improvement we are working on. The key step is to get the current filaments to survive to the end of the anode by eliminating the heavy-metal impurities (by using beryllium electrodes) . That will decrease the radius of the plasmoid by a factor of about 6 or 7. This in turn will greatly increase the density, by about a factor of 300. Using a heavier gas mix will at least double the density. And finally we intend to approximately double the peak current delivered, which will increase density 4-fold. So that will cover the factor of 3,000 we need.

Brendan Ali:
Since the reactor power gain (total electrical input vs total power output) is different than fusion yield the way it was used in your paper (only Heat power input to create plasma vs total power output), do you still expect that the size of reactor in order to get net reactor power will be able to fit in a garage? Will you need to scale it in size more after you achieve net fusion yeild before it can be used commercially with net reactor power?

Eric J. Lerner, November 12, 2017:
In our presentations, we use "wall-plug efficiency" to compare our results to others. That is total energy out divided by total electrical input to the device. That is different than the way other groups often compare energy out of the plasma to energy into the plasma, which is often much less than the total energy into the device. So our goal in the present scientific research stage of the project is more than 100% wall-plug efficiency--more energy out of the device than the total put into it. For a power generator we will need to be enough above 100% to make up for losses in direct energy conversion. However, yes, we do expect to get to that level with a generator that can fit in a garage. Such a generator will produce around 5 MW net power.


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Project C - MDE - Laying the foundation

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