Re: Please tell me what kind of capacitor is good to use for making EMP
rp181, Mon Feb 02 2009, 01:29AM

pulse capacitor's..... Do you actually know what your doing?

Re: Please tell me what kind of capacitor is good to use for making EMP
Hon1nbo, Mon Feb 02 2009, 04:06AM


really do consider the acronym "EMP" (ElectroMagnetic Pulse)

unless you are asking a question such as "should an oil filled HE pulse capacitor or a bank of smaller value, higher voltage capacitors be used?

Re: Please tell me what kind of capacitor is good to use for making EMP
Shaun, Mon Feb 02 2009, 05:59AM

Your best bet would be a bunch of very high voltage (15kV+) capacitors in the nanofarad range, set up in a Marx Generator. With an antenna, these are capable of producing an electromagnetic pulse.

Re: Please tell me what kind of capacitor is good to use for making EMP
Gratitude, Mon Feb 02 2009, 01:42PM

with all respect to all of you, regarding answering my question. but i want to use this project as a research and in good way. cause i'm researcher. do you know that this EMP can destroy the kidney stone and help people so please be optimist.
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secondly please tell me is it good to use like bunch of 400V,6800MFD cap or its better to use the low capacitence capacitor but high voltage? or is it depend on energy which capacitor is making or the voltage?

Your Sincerely

Thanks alot

Re: Please tell me what kind of capacitor is good to use for making EMP
aonomus, Mon Feb 02 2009, 01:49PM

If you are a researcher you should have access to IEEE papers or other peer reviewed journals, and you should be able to use the search function on the forums to find previous threads regarding EMP's and you should be able to see that people won't touch these kinds of topics with 10 foot poles at times.

To be frank, 4hv is not neccessarily a forum for us to do your homework for you, read more threads and come back further educated...

Re: Please tell me what kind of capacitor is good to use for making EMP
Gratitude, Mon Feb 02 2009, 02:06PM

again with all respect there was nothing i found, and thats why i opened this Thread. and i told you this is the research and is not home work, you better be optimist as i told you, and google something then you will understand there is no specific related information in this forume and specially in this section regarding what i asked. so you are welcome if you know something.

thanks again

Re: Please tell me what kind of capacitor is good to use for making EMP
likewhat, Mon Feb 02 2009, 02:08PM

To generate EMP you need to fire a fast risetime pulse into an antenna. the frequency (and therefore 1/risetime) of an LC circuit is like (LC)^(-1/2). You need a very low inductance and very small capacitance for that to be a big number. Very small capacitance sucks because there will be no stored energy. The fast risetime machine that I work with uses a 20 nF capacitor that is charged to 50kV. That is kinda hard to do because you need a charging supply that goes to 50kV. That goes through some high pressure peaking switches to get the risetime to less than 1 ns. That could in principle be sent into and antenna and radiated, but I dont know if it would do much because the stored energy is so low.

Re: Please tell me what kind of capacitor is good to use for making EMP
big5824, Mon Feb 02 2009, 02:12PM

yes we seem to be answering the same question at least once every day or two at the moment....

Re: Please tell me what kind of capacitor is good to use for making EMP
Gratitude, Mon Feb 02 2009, 02:18PM

thanks again, but as i worked in coilgun and boost converter, i think if it is depend on the energy that capacitors will make for us. why would we use the same thing and use antenna instead of coil to radiate the energy? and secondly we can use good switches to do that risetime which should be less than 1ns.

thanks