[QuantumDot]

How did it affect the confinement time?

does this mean that the team will try higher pressures as they up the current?

since density*confinement time*input current

[QuantumDot]

How did the density affect the pinch? since i understand that the team didn’t expect it pinch since the density was so high, do you think that it will work even better or is it retarding the pinch?

[QuantumDot]

Could someone on the experiment team give a loose timeline of the future updates to the FoFu machine, like i have read that you expect to sometime by the end of the year switch to shorter electrodes and try for p-11B, so maybe say what the hope to do in the upcoming months like what new sensors you will add. or at less the next month if not for the whole year?

[QuantumDot]

Does anyone know the current plasma density?

[QuantumDot]

In an article published in 2004[8], S. Son and N.J. Fisch identified a possible iginition regime for p-11B and D-3He, in which ρ > 105 g/cm, Ti =~ 200 keV and Te =~ 30 keV; for p-11B, the optimized fuel concentration overcoming the Bremsstrahlung losses would be nB/np = 0.3[9].

Hydrogen-boron fusion requires ion energies or temperatures almost ten times higher than those for D-T fusion. For given densities, the reaction rate for hydrogen boron achieves its peak rate at around 600 keV (6.6 billion degrees C) while D-T has a peak at around 66 keV (730 million degrees C). In addition, the peak reaction rate of p-11B is only one third that for D-T.

http://z-fusion.net/spip/spip.php?article61

So depending on the density it look like they could already do D-T fusion, but for p-11B you want about triple the average Ti temperature.

[QuantumDot]

Here is a file from MIT on the expected price of helium3 taken from the moon or from nuclear decay. but from what i say they both need a temperature of about 100keV so boron11 should be cheaper, but at an expected energy price of about 7 dollars a gallon for the equivalent energy its better then gas but not boron.

ocw.mit.edu/NR/rdonlyres/Nuclear…/22…2006/…/helium3_fusion.pdf

the file is too large for me to attach

[QuantumDot]

I understand your point but since there is a lot of helium 3 on the moon and supposedly on mars it would be one reason to go and it would encourage funding into DPF and other advanced fusion projects with advanced fuels.

[QuantumDot]

What are the requirements for the other fuels like helium 3, and how does the current density compare to that required net energy? because if its just a matter of increasing current then its just a matter of time until you guys can finally say that you net power. and that will have to be something like the moon landing in that everyone will want to remember the day.

[QuantumDot]

Polywell’s are supposed to increase to the fifth power of the radius and the fourth power of the magnetic field.

[QuantumDot]

On the Wikipedia page about DPF it says that, the ones that are larger in the MJ, MA range have pinch’s that last milliseconds, but i didn’t see what experiment that it was referring to and if they do exist does that mean that somewhere the right equipment exists, do you or anyone know? with the improvements that have already been made so far the millisecond confinement time with megawatts of input power look very good.

“These critical phases last typically tens of nanoseconds for a small (kJ, 100 kA) focus to around a microsecond for a large (MJ, several MA) focus”
http://en.wikipedia.org/wiki/Dense_Plasma_Focus

[QuantumDot]

I would say that i’m more interested in seeing them use superconductors like the one made by Chang-Beom Eom at UW-Madison, it doesn’t sound like they are using the right elements to have x-ray transparency that you would want but there ability to carry current and probability resist melting.
http://www.physorg.com/news186667839.html

[QuantumDot]

is it true that the output power is suppose to be 5 times the input power?

What is the highest power that you have put in so far, how much do you plan to do before this project is over, do you think that you might put in move then a megavolt per shot or for money or parts would that be too much?

[QuantumDot]

Could once a week of so, someone working on the device write about its current state, meaning what sensors are working, what stage of the project you are working on, like i think that i have heard that you are moving to stage 6 which is supposed to be working with heavier nuclei. And then maybe to sum up what it actually means to those that wouldn’t understand. A list of the goals that you have meet so far and what has convinced you that you have achieved them would he great. Either here or somewhere in the website in a post or somewhere.

[QuantumDot]

George Miley design for a p-b11 dpf says for a 500kN 2000isp
power 800mw
w = 80mj
vo = 400kv
Q = 3.07
and about 10um per day of ablative material at 10 hz
thrust to weight of 20 – 44 kN/MT
http://nextbigfuture.com/2010/03/dense-plasma-focus-dpf-fusion-systems.html

QED engines are described elsewhere in this and previ

[QuantumDot]

Augustine wrote:

to solve the thrust problem with the focus fusion you just need to add some material in front of the ion beam and let the beam heat and then eject the material, it would basically function like a pulse detonation rocket engine with the FF acting as a ignition source. so there would still be a lot of engineering problems but it would be possible for a single stage craft. using a deep cooling precooler and then the ff to ignite and then when it gets too high use some stored fuel as a rocket and then when in space just use the pure ion beam or when you need more thrust revert it back to a rocket. adding in optical and magnetic refrigeration would reduce the weight add simplify the design and be useful at all stages of the vehicles life.

I think that you violated the law of conservation of energy. If for example a FF pulse imparts 10 Joules of energy then you can’t make it 100 Joules of energy by putting something in the way of the blast unless you put something in the way that explodes (releases additional energy by breaking chemical bonds) when hit with by an ion beam.

You seem to have misunderstood something. since what i am trying to describe is basically a form of afterburner for the DPF, since thrust is the velocity time the change is mass divided by the change in time, now since you are increasing the mass from what i think is a few micro grams to say a few kilograms in the same amount of time thrust should go up quite a lot now since you are slowing down the beam since it will hit the fuel and heat it up to a few thousand degrees C it won’t have the same exit velocity or the same ISP but when you need thrust it should work quite well.

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