[moved] Explosive pulse generator / Electromagnetic Radiation / Forums

Forums

4hv.org :: Forums :: Electromagnetic Radiation

« Previous topic | Next topic »

[moved] Explosive pulse generator

previous 1 2 3 4 next

Move Thread

LAN_403

Dr. Shark

Wed Sept 20 2006, 02:35PM

Registered Member #75 Joined: Thu Feb 09 2006, 09:30AM
Location: Montana, USA
Posts: 711

Steve, I like your attitude on this one - where is the fun when you can't discuss homemade weapons of mass destruction

Anyway, I think the original posters main point is this: If you charge a capacitor and pull the plates apart, you have to put in work and thereby increase the energy in the capacitor. Looks like he wants to acomplish this with an explosion, which is, umm, not very likely to work.

He seems to confuse the "metal net" virtual cathode in this Viagra-thing with the capacitor plates, which is probably where he got mixed up. Anyway, speaking of Wheedkiller/Sugar rocket fuel, I think a magnetohydrodynamic generator might be a viable alternative and might even be within range for a hobbyist.

Steve Conner

Wed Sept 20 2006, 06:35PM

Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706

I did a bit of googling and I guess he's talking about "Tore Supra"

a big tokamak in France. That link points to some still photos, and also movies of the reactor running. They are awesome to watch. You can actually see what looks like the camera speckling from radiation as the thing really starts to get going.

Fusion

Wed Sept 20 2006, 08:43PM

Registered Member #354 Joined: Thu Mar 30 2006, 10:12AM
Location:
Posts: 55

I have done some calculus:

The required Lawson parameter is
1e21 keV*sec/m3 that is 160000 Pascal*second

From the simulated discharge I have a discharge time of only 113 microseconds
The maximum current would be 7.3Megaamps (I calculated 5.1Megaamps)
With that figures, the obtained pressure is 4.43E13 Pascals
That pressure is a ultrafar beyond maximum ultimate strength of any material: it would convert the Deuterium Tritium in a BLACK HOLE: its have to burn!
Then the pressure-time is 30 thousand times greater than lawson required
The efficiency is about 98%

Now I have to let you because I am building a model of my ultrapowerful reactor and make some low voltage tests

Problems:

it is a problem to create a little Black Hole?

Do somebody know how to calculate the final size of a sphere under pressure if it is known the Young modulus?

Steve Conner

Wed Sept 20 2006, 08:52PM

Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706

How did you get from 5.1MA to 4.4 * 10^13 Pa? I'd sure be interested to see the working.

I think if you managed to create a small black hole on Earth, your biggest problem would be jealous scientists from RHIC

letting your tyres down

These guys really know how to smash stuff hard, and they haven't quite managed to make one yet. There was actually a discussion at the time RHIC was being built, about what might happen if it managed to create a black hole:

Note: properties like Young's Modulus are for bulk solids under Newtonian conditions, they aren't meaningful any more when the substance is pulverised into subatomic mush. Hell, Young's Modulus even stops being useful if you hit a nail too hard and it bends, never mind smashing gold ions together at 0.9999 times the speed of light.

All of this is academic though, since you don't seem to have figured out what a vircator actually is yet.

Dr. Shark

Thu Sept 21 2006, 11:41AM

Registered Member #75 Joined: Thu Feb 09 2006, 09:30AM
Location: Montana, USA
Posts: 711

Wow, this is getting better by the minute! Fusion, could you please provide us with a drawing of your proposed aparatus, and show us the calculations used to arrive at those figures? It would be very interesting to know some details.

*goes back to his workshop to test if marx-generator produces enough MAmps to make a black hole*

Fusion

Thu Sept 21 2006, 05:33PM

Registered Member #354 Joined: Thu Mar 30 2006, 10:12AM
Location:
Posts: 55

First results:

After first testing following plot was obtained.
As I can seen only 11% efficiency was obtained, so the device would have only 17.2 kilotesla at full power.

Perhaps at higher frequency and improving the design I could reach greater efficiency.

In the excel table it is stated that the coil temperature will raise to some hundred megakelvin, so it will convert to plasma developing a big electromagnetic burst that could destroy any electronic device close to the testing area so I will be in troubles to test it.

I am not convinced that making a black hole that is a space-time singularity is a good idea: it can make fusion but fusion energy can not be extracted from it! and it could eat any thing. It is possible to drive it by charging it by feeding with a charge and moving with a coil?

Fusion

Thu Sept 21 2006, 08:13PM

Registered Member #354 Joined: Thu Mar 30 2006, 10:12AM
Location:
Posts: 55

Here are the two better plans of the vircator. I think the better option is the named "fig 1" because has a coil instead of a magnet that will be saturated.

There is an important document describing vircators that is the Proc of 3TH conference on High Power electron and ion beam research and technology, 1979. Do anyone have a copy of that important papers?

Ben

Thu Sept 21 2006, 10:37PM

Vigilatny
Registered Member #17 Joined: Thu Feb 02 2006, 02:47PM
Location: NL
Posts: 158

If by some miracle you did create a black hole, you needn't worry. A black hole massing anything less than the Sun would radiate away mass faster than could be shoved into it.

Also this thread is dangerously close to the B.S. category. Try to keep it in reality.

Steve Conner

Fri Sept 22 2006, 09:20AM

Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706

I agree with Ben. This just sounds like a bad science fiction B-movie, and the plot is so thin it wouldn't even fool the average sci-fi geek, let alone armchair physicists like us. I've read more believable science in an E.E. Doc Smith novel.

If you can't explain what relevance that oscilloscope plot you posted has to vircators or flux compression generators, this thread will be locked. (It just looks like two 1MHz sine waves to me, and I don't see any readouts showing millions of amps.)

Fusion

Mon Sept 25 2006, 08:30PM

Registered Member #354 Joined: Thu Mar 30 2006, 10:12AM
Location:
Posts: 55

Last plot was the first part of the device just before blast that I am not testing now. In the first part I must inject the feed field but I failed with 7-11% of efficiency, then I improved the device and now I have a 30% of efficiency, but then I simulated it but I commited a mistake and I obtained the following simulation (the chirp following 420ns is 1Ghz)
NOTE: I am not going to built so big!
I do not try to offend to anybody but now I have to work a lot to find components and redesign in order to make a lot less powerful but afordable device that can be tested with no more than 200Mhz-1 kilovolt output (my scope probes rating). I must switch in about 20-50ns error and lots of amps but I do not have a current probe that support more than 50 amps and can not use sensing resistors so I will not be able to measure overall efficiency

previous 1 2 3 4 next

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob