Search found 191 matches

by blaisepascal
Mon Jul 07, 2008 10:54 pm
Forum: Theory
Topic: Where's the beef?
Replies: 132
Views: 36753

The power density of the sun is pitiful. Microwatts per cc of volume. Solar radius: 6.955E8 m (6.995E10 cm) 4/3 pi r^3 = 1.433678e+33 cc Solar Output = 3.83E26 Watts ************************** 2.67E-7 W/cc Pitiful. It's not that bad... Only the core is a significant fusion source, which is about 1/...
by blaisepascal
Thu Jun 26, 2008 3:01 am
Forum: Implications
Topic: Shipping
Replies: 56
Views: 24694

Re: The Akron, the Macon, the ... Bussard?

If Polywell's are net Helium consumers, we're in trouble. If they are net producers, let me think: copious helium, vast amounts of heat, fuel is negligible - imagine 100 MPH superdirigibles cruising the stratosphere. p-B11 Polywells are net producers, each mole of boron used as fuel creates 3 moles...
by blaisepascal
Wed Jun 18, 2008 10:56 pm
Forum: Theory
Topic: Electron recirculation
Replies: 106
Views: 23884

That would require collimating the alphas coming from each cusp and focusing them say with an electrostatic lens. As I understand it, current theory is that the alphas will have too much energy to be seriously steered by the B-Fields. That's why there's another thread going on about how to shape th...
by blaisepascal
Wed Jun 18, 2008 4:09 am
Forum: Design
Topic: Throttling and idling....
Replies: 19
Views: 6330

That's not quite what I meant... If you have a 100MW reactor on the grid, the grid will be demanding (say) 90MW during the day and 40MW during the night. How do you manage that variable load? Do you do it by controlling the flow through the ion guns? Adjusting the voltages of the various E-Fields or...
by blaisepascal
Wed Jun 18, 2008 3:34 am
Forum: Design
Topic: Throttling and idling....
Replies: 19
Views: 6330

Throttling and idling....

(I'm 80% sure this should be in "design" and not "theory". Let me know if it's in the wrong place). How does one throttle and idle a direct-conversion polywell reactor? Demand for energy will vary, so how do you turn it down without turning it off? Most other power plants use a g...
by blaisepascal
Mon Jun 16, 2008 11:09 pm
Forum: Implications
Topic: Adding an option
Replies: 18
Views: 7742

Re: Adding an option

Just did a quick look. Assuming a $200 million cost for a 100 MW plant, a staff of 6 handsomely paid ($200k/year) nuclear physicists to run it, fuel costs of $500/day (am I even close?), and maintenance costs of $1 million/year, the break-even cost of power over 20 years would be about $0.03/kwh. T...
by blaisepascal
Mon Jun 16, 2008 2:21 am
Forum: Theory
Topic: Of Line Cusps
Replies: 39
Views: 11615

I am curious how he came to the 2x the gyro-radius figure, and I'm a bit confused about what he means exactly. Because if the electrons are on an escape trajectory they must be traveling at nearly parallel to the B-field, which means their gyro-radius is basically zero, no matter what the energy or...
by blaisepascal
Fri Jun 13, 2008 10:57 pm
Forum: News
Topic: Another one from Alan Boyle
Replies: 52
Views: 20544

Also note that since it is an uncooled pulsed machine (last I heard), if you're sitting there taking data all afternoon you probably aren't running at fusion conditions. There's no reason it is necessary to assume that the "taking data all afternoon" means "continuous operation"...
by blaisepascal
Fri Jun 13, 2008 8:57 pm
Forum: Awareness
Topic: Yet another Polywell website
Replies: 49
Views: 46954

To understand what jmc is talking about visit Wikipedia: Binding energy or do a general web search on "nuclear binding energy". But the more I stare at the graph of binding energies, the less I understand why C12 decays. The binding energy is simply the difference between the mass of the ...
by blaisepascal
Tue Jun 10, 2008 3:41 pm
Forum: Implications
Topic: Polywell transportation: how small?
Replies: 48
Views: 39584

I have been thinking that a modest 180 Hz modulation of the proper waveform of BFR current output might reduce the necessary size of some of the high voltage components. If I recall correctly, there is a large amount of investment already in engineering and equipment that works at 400Hz, usually us...
by blaisepascal
Mon Jun 09, 2008 2:39 pm
Forum: Theory
Topic: magrid configuration brainstorming
Replies: 632
Views: 139378

Mike: The thing to remember is that without the use of magnetic monopoles you have to have the same number of magnetic field lines going out as coming in, no matter what geometry you use. Putting another shell around the polywell won't eliminate the cusps, but it'll push them around and make them mo...

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