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Aeronaut wrote: Darren Snider posted this on the FB page recently- http://www.divtecs.com/research/high-current-high-voltage-igbt-switch/ which looks to me like it might be properly scalable.

But it says that the total power is 500MW. LPPX should require 300GW. 600 hundred of those things must not be that practical.

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Henning wrote: I think it will have synchronisation problems, ie. not all switches working in an equally narrow time frame than we have today, as for mechanical designs taking longer to switch than the ionisation of gases. If it’s possible to build bigger switches than with ionising gas switches, and then just using one of them, it might be worth a second thought.

The idea is to build a capacitor that can store an release as fast and with the highest density possible. As for the syncronization problem, I was thinking if it would be possible to cause some kind of cascade effect after reaching a threashold.

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Brian H wrote: Is this a one shot design? If not, how fast could it cycle, with all the flexing? And how many billion cycles could it last?

This is just a concept. I know almost nothing about spark plugs but I know that there has to be a discharge with an energy several orders of magnitude higher than my car’s.

How long must be the discharge last?

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Yes, the coil distorts and touch the z axis. The idea is to use the toroid as a capacitor that when it reaches a certain critical density it fires its energy.

I thought of something else in the meantime. It goes in the opposite direction.

Take this picture as an example.

http://upload.wikimedia.org/wikipedia/commons/f/f3/2006-02-04_Metal_spiral.jpg

Make it a toroid. It is a spring also, but the coil is flat. So, as one puts energy in there, it stores energy in potential mechanical form and potential eletromagnetic form. It will expand and at a point it will touch a pin, which will fire towards the anode.

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Sure, patience is a virtue. But it seems funding for LPPX will finish in 2 months.

https://focusfusion.org/index.php/site/article/lpp_initiates_2_year_experiment_to_test_pb11/

It began in the begining of 2009.

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Was even 10J per shot achieved anyway?

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So, any news?

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A simple proposal here: Fire once, check if the spark plugs are ok, prepare the experimental set up again, and fire again. Repeat.

I’ve been following LPPX twitter and it seems that shots are done just once every week, on average, because the spark plugs are too fragile. Since this stage of research is about exploring the feasibility of the technique, I guess fast repeatability should not be of concern right now. Taking the september 30th video, it seems that there was a shot every few seconds or so, maybe this is too much stress on the system. I guess there shouldn’t be this kind of thing and instead be cautious like in the suggestion. Maybe the number of shots per week would be much higher.

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zapkitty wrote: You’ll find that if you wave your hands fast enough eventually you’ll take off and start flying around the room.

This is not a joke. The muzzle energy of this gun is about 150KJ.

http://en.wikipedia.org/wiki/M230_Chain_Gun

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Alven won a nobel prize for explaining many of the pinch phenomena that happens in aurara and sun. Inside earth, that is known for centuries:

http://en.wikipedia.org/wiki/Pinch_(plasma_physics)

For quasars, that’s not widely accepted, although if Focus Fusion goes OK, it will probably be.

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AaronB wrote: We have lots of data to analyze, but lots of other things are also going on (papers to write, people to call, etc.). It would be nice to have a big crew of physicists and engineers to help share the load. We decided we need several clones of ourselves.

You could make a call for other people to help you as volunteers.

BTW, I think a comment of mine to which you answered was deleted. Why?

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I am thinking on donating, although a taxation of 100% makes it hard for me. I’d like to donate, but 30 dollars is too expensive…

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They have things in common. “Lawrence” in the name…

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This is the website that hosts the papers from Lawrence Physics Inc.:

http://www.lawrencevilleplasmaphysics.com/index.php?option=com_content&view=article&id=68&Itemid=86

Check the hyperlinks from Eric’s paper. If you delete the .pdf file name, you get linked to that website. So, Eric probably authorized that website.

BTW, it is common to the authors of papers to host the papers they publish, even if they are from Nature. For example, this one:

http://rogers.matse.illinois.edu/publications.html

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If LPP finds suppression of bremsstrahlung of boron fusion soon, they might have a chance.

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