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4hv.org :: Forums :: High Voltage
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200 Kilovolts VS Amethyst

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Oneironaut
Wed Aug 01 2012, 04:59PM Print
Oneironaut Registered Member #3616 Joined: Fri Jan 14 2011, 08:47PM
Location:
Posts: 34
My 200KV Marx generator ran for the first time today, and it worked perfectly. Being a little "cautious", I set the spark gaps for only 1.25 inches and ran a ballast made of 2000 watts of halogen bulbs to limit the current to the 40kv potential transformer.

My goal was to separate amethyst crystals in one pulse, a process that takes an expert with a tiny hammer several hours. The project was a success.

15
My 200KV Marx Generator and rock disaggregation vessel.

16
The result after 1 pulse! Original rock was about the size of a large grapefruit.

17
Spark gaps only set to 1.25 inches during this test.

18
The 40KV GE potential transformer and diode string.

Now I want to find some funding to build a backpack version using proper Maxwell pulse caps.
Any takers?

Brad


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Dri0m
Wed Aug 01 2012, 05:35PM
Dri0m Registered Member #4497 Joined: Thu Apr 19 2012, 12:53PM
Location: Behind you
Posts: 62
umm, why did you destroy amethyst? it's so nice mineral! :D btw nice machine :)
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Oneironaut
Wed Aug 01 2012, 05:40PM
Oneironaut Registered Member #3616 Joined: Fri Jan 14 2011, 08:47PM
Location:
Posts: 34
Dri0m wrote ...

umm, why did you destroy amethyst? it's so nice mineral! :D btw nice machine :)

Yeah, those huge 5 pointed clusters are definitely impressive, but the solid pieces inside make expensive jewelery!

Brad
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Ben Solon
Wed Aug 01 2012, 05:52PM
Ben Solon Registered Member #3900 Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
There's been some ideas to do high voltage coilguns built into backpacks. For a low voltage version it would be fine, but both designs use the energy stored in a capacitor where energy is a function of capacitance and capacitance. To make it small enough to fit a backpack the caps have to be lower capacitance, higher voltage, and if there's 200kv worth of isolation stuffed in as well, there's really no point to it anymore.

But if you mean something that is built into a backpack unit to be assembled remotely, then go for it!

Nice work though, but don't get too comfortable near those caps XD
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Oneironaut
Wed Aug 01 2012, 06:15PM
Oneironaut Registered Member #3616 Joined: Fri Jan 14 2011, 08:47PM
Location:
Posts: 34
Yes, a version that could be traversed into the bush and setup, not a backpack mounted weapon, although that would indeed be cool!

When you say "don't get too comfortable around those caps", do you mean it would be unwise for me to sit next to them while they charge and let the hissing corona leaking from the gaps keep my coffee warm?

Yeah, I stand in the other room when they go boom!
Blew out a window from a discharge once, so there is always a risk of shrapnel, even when it's working!

Brad
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Forty
Wed Aug 01 2012, 06:17PM
Forty Registered Member #3888 Joined: Sun May 15 2011, 09:50PM
Location: Erie, PA
Posts: 649
I wouldn't want a capacitor bank at even a tenth of that voltage charged and strapped to my back.

Have you looked into defibrillator capacitors for a more portable version? I know aerovox makes some rather compact versions.

I can just picture you walking through a rocky area with a ghostbusters like backpack blasting rocks apart. lol.

Any damage to your spark gap electrodes after the test? I was expecting them to be partially vaporized at that kind of energy level.
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AuroraFlame
Wed Aug 01 2012, 09:20PM
AuroraFlame Registered Member #5566 Joined: Tue Jul 03 2012, 10:55AM
Location:
Posts: 12
Wow that looks dangerous, no way I would have something like that strapped to my back. Maybe an electro-fishing backpack device could be modified? Some of those electrofishing backpacks are actually powered by small petrol engines! Link2
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Steve Conner
Wed Aug 01 2012, 09:46PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Looks good! smile The only suggestion I can offer is to put some big high wattage resistors in series with the two charging inputs, to protect the diode string and transformer from transients.
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HV Enthusiast
Wed Aug 01 2012, 09:48PM
HV Enthusiast Registered Member #15 Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
Awesome. How exactly do you hook up the output to the Amethyst? Are you just discharging the the marx. through the crystal?
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Oneironaut
Wed Aug 01 2012, 10:29PM
Oneironaut Registered Member #3616 Joined: Fri Jan 14 2011, 08:47PM
Location:
Posts: 34
Steve Conner wrote ...

Looks good! smile The only suggestion I can offer is to put some big high wattage resistors in series with the two charging inputs, to protect the diode string and transformer from transients.

Thanks for the advice. I wonder what value would be good? Perhaps a 500 watt halogen bulb would work as a charging resistor?

Brad
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