Will this EMP bomb work?
in [Design]
|
From: Dirk Bruere at NeoPax on 14 Apr 2010 22:11 On 15/04/2010 01:31, Richard wrote: > On Apr 14, 4:35 pm, John Fields<jfie...(a)austininstruments.com> wrote: >> On Wed, 14 Apr 2010 04:40:04 -0700 (PDT), Adam Freeman >> >> <afreeman...(a)googlemail.com> wrote: >>> Basically a circuit consisting of an amalgamation of a Marx circuit to >>> generate the high seed current and an inductor wrapped around an >>> explosively driven armature. >> >>> http://img651.imageshack.us/img651/3043/empbombj.pdf >> >>> Some questions I had were: >>> 1) How do I find out the precise time the current through the inductor >>> coil will be maximum, given real conditions (e.g. finite resistances, >>> inductance of the Marx circuit itself, eddy currents in armature...)? >> >> --- >> Somebody got into this a few years ago... >> >> http://www.freeratio.org/thearchives/showthread.php?t=67081 >> >> So, since it's old news: >> >> Since you'll be dumping a charged cap into an inductance, unless it's >> critically damped it'll ring at: >> >> 1 >> f = -------------- Hz >> 2pi sqrt(LC) >> >> which is a period of: >> >> t = 2pi sqrt(LC) seconds. >> >> the maximum current in the circuit will occur 90� after the switch >> connecting the cap to the inductor is made, which will be at: >> >> 2pi sqrt(LC) >> t = ------------- seconds. >> 4 >> >> If you don't already have it, download a copy of LTspice from: >> >> http://www.linear.com/designtools/software/ >> >> and run this: >> >> Version 4 >> SHEET 1 880 680 >> WIRE -112 0 -272 0 >> WIRE 0 0 -32 0 >> WIRE 192 0 0 0 >> WIRE 192 64 192 0 >> WIRE 144 80 80 80 >> WIRE 0 176 0 0 >> WIRE 192 176 192 144 >> WIRE -272 288 -272 0 >> WIRE -96 288 -96 48 >> WIRE 80 288 80 80 >> WIRE 192 288 192 256 >> WIRE -272 448 -272 368 >> WIRE -96 448 -96 368 >> WIRE -96 448 -272 448 >> WIRE -48 448 -48 48 >> WIRE -48 448 -96 448 >> WIRE 0 448 0 240 >> WIRE 0 448 -48 448 >> WIRE 80 448 80 368 >> WIRE 80 448 0 448 >> WIRE 144 448 144 128 >> WIRE 144 448 80 448 >> WIRE 192 448 192 368 >> WIRE 192 448 144 448 >> WIRE -272 544 -272 448 >> FLAG -272 544 0 >> SYMBOL ind 176 160 R0 >> SYMATTR InstName L1 >> SYMATTR Value 1e-3 >> SYMBOL cap -16 176 R0 >> SYMATTR InstName C1 >> SYMATTR Value 1e-3 >> SYMBOL sw 192 160 M180 >> WINDOW 0 32 15 Left 0 >> WINDOW 3 32 44 Left 0 >> SYMATTR InstName S1 >> SYMBOL sw -16 0 M270 >> WINDOW 0 32 15 Left 0 >> WINDOW 3 32 44 Left 0 >> SYMATTR InstName S2 >> SYMBOL voltage -272 272 R0 >> WINDOW 0 -42 -1 Left 0 >> WINDOW 123 0 0 Left 0 >> WINDOW 39 0 0 Left 0 >> SYMATTR InstName V1 >> SYMATTR Value 10000 >> SYMBOL voltage -96 272 R0 >> WINDOW 0 -55 8 Left 0 >> WINDOW 3 24 104 Invisible 0 >> WINDOW 123 0 0 Left 0 >> WINDOW 39 0 0 Left 0 >> SYMATTR InstName V3 >> SYMATTR Value PULSE(0 1 0 1e-6 1e-6 10) >> SYMBOL voltage 80 272 R0 >> WINDOW 0 -55 8 Left 0 >> WINDOW 3 24 104 Invisible 0 >> WINDOW 123 0 0 Left 0 >> WINDOW 39 0 0 Left 0 >> SYMATTR InstName V2 >> SYMATTR Value PULSE(0 1 11 1e-6 1e-6 10) >> SYMBOL res 176 272 R0 >> SYMATTR InstName R1 >> SYMATTR Value 1 >> TEXT -256 480 Left 0 !.model SW SW(Ron=1e-6 Roff=1e7 Vt=0.5Vh=0) >> TEXT -248 512 Left 0 !.tran 0 20 0 >> >> Adjust the strays as required, and you'll probably get a pretty good >> idea of what you can expect in terms of maximum current. >> --- >> >>> Is this something best found out by experiment and a digital >>> oscilloscope? >> >> --- >> Since you'll eventually have to go real-world in order to get real data, >> the answer is: "yes". >> --- >> >>> 2) Presumably, the optimal time for the armature to short out the >>> inductor coils is when the current within it is at a maximum. >>> Considering that explosives have a finite run up to detonation, how do >>> I calculate the best time to initiate the explosives? >> >> --- >> Since you now already know how long it's going to take for the the >> current in the coil to build up to a maximum, all that's left to do is >> to determine when to initiate the explosive so that as the armature >> expands it starts shorting out the solenoid's turns when the current is >> at its peak. >> --- >> >>> 3) The explosives used will probably be a cylindrical charge of TNT >>> with a length of ~10cm and a radius of ~2cm. Will there be any >>> problems initiating such a small explosive? >> >> --- >> As long as the armature isn't affected by the initiator, I don't think >> so. >> --- >> >>> 4) Do you have any suggestions on how the electromagnetic pulse can be >>> maximised, with a goal of destroying nearby unshielded electronics? >> >> --- >> Maybe. >> --- >> >>> 5) Can you suggest any other design optimisations? >> >> --- >> Maybe. >> --- >> >>> I am willing to provide funds for quality advice if you can provide >>> evidence of your expertise. >> >> --- >> Email me if you like, with particulars, but be aware that I'm a >> registered USDoD contractor and I don't do any rogue foolishness. >> >> JF > > Can we make something that is rechargeable, concealable and capable of > killing a disco thumping SUV in traffic? > A Vircator http://en.wikipedia.org/wiki/Vircator Will also likely work on PCs in Wall St skyscrapers. -- Dirk http://www.transcendence.me.uk/ - Transcendence UK http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: Michael A. Terrell on 14 Apr 2010 22:44 Richard wrote: > > On Apr 14, 4:35 pm, John Fields <jfie...(a)austininstruments.com> wrote: > > On Wed, 14 Apr 2010 04:40:04 -0700 (PDT), Adam Freeman > > > > <afreeman...(a)googlemail.com> wrote: > > >Basically a circuit consisting of an amalgamation of a Marx circuit to > > >generate the high seed current and an inductor wrapped around an > > >explosively driven armature. > > > > >http://img651.imageshack.us/img651/3043/empbombj.pdf > > > > >Some questions I had were: > > >1) How do I find out the precise time the current through the inductor > > >coil will be maximum, given real conditions (e.g. finite resistances, > > >inductance of the Marx circuit itself, eddy currents in armature...)? > > > > --- > > Somebody got into this a few years ago... > > > > http://www.freeratio.org/thearchives/showthread.php?t=67081 > > > > So, since it's old news: > > > > Since you'll be dumping a charged cap into an inductance, unless it's > > critically damped it'll ring at: > > > > 1 > > f = -------------- Hz > > 2pi sqrt(LC) > > > > which is a period of: > > > > t = 2pi sqrt(LC) seconds. > > > > the maximum current in the circuit will occur 90� after the switch > > connecting the cap to the inductor is made, which will be at: > > > > 2pi sqrt(LC) > > t = ------------- seconds. > > 4 > > > > If you don't already have it, download a copy of LTspice from: > > > > http://www.linear.com/designtools/software/ > > > > and run this: > > > > Version 4 > > SHEET 1 880 680 > > WIRE -112 0 -272 0 > > WIRE 0 0 -32 0 > > WIRE 192 0 0 0 > > WIRE 192 64 192 0 > > WIRE 144 80 80 80 > > WIRE 0 176 0 0 > > WIRE 192 176 192 144 > > WIRE -272 288 -272 0 > > WIRE -96 288 -96 48 > > WIRE 80 288 80 80 > > WIRE 192 288 192 256 > > WIRE -272 448 -272 368 > > WIRE -96 448 -96 368 > > WIRE -96 448 -272 448 > > WIRE -48 448 -48 48 > > WIRE -48 448 -96 448 > > WIRE 0 448 0 240 > > WIRE 0 448 -48 448 > > WIRE 80 448 80 368 > > WIRE 80 448 0 448 > > WIRE 144 448 144 128 > > WIRE 144 448 80 448 > > WIRE 192 448 192 368 > > WIRE 192 448 144 448 > > WIRE -272 544 -272 448 > > FLAG -272 544 0 > > SYMBOL ind 176 160 R0 > > SYMATTR InstName L1 > > SYMATTR Value 1e-3 > > SYMBOL cap -16 176 R0 > > SYMATTR InstName C1 > > SYMATTR Value 1e-3 > > SYMBOL sw 192 160 M180 > > WINDOW 0 32 15 Left 0 > > WINDOW 3 32 44 Left 0 > > SYMATTR InstName S1 > > SYMBOL sw -16 0 M270 > > WINDOW 0 32 15 Left 0 > > WINDOW 3 32 44 Left 0 > > SYMATTR InstName S2 > > SYMBOL voltage -272 272 R0 > > WINDOW 0 -42 -1 Left 0 > > WINDOW 123 0 0 Left 0 > > WINDOW 39 0 0 Left 0 > > SYMATTR InstName V1 > > SYMATTR Value 10000 > > SYMBOL voltage -96 272 R0 > > WINDOW 0 -55 8 Left 0 > > WINDOW 3 24 104 Invisible 0 > > WINDOW 123 0 0 Left 0 > > WINDOW 39 0 0 Left 0 > > SYMATTR InstName V3 > > SYMATTR Value PULSE(0 1 0 1e-6 1e-6 10) > > SYMBOL voltage 80 272 R0 > > WINDOW 0 -55 8 Left 0 > > WINDOW 3 24 104 Invisible 0 > > WINDOW 123 0 0 Left 0 > > WINDOW 39 0 0 Left 0 > > SYMATTR InstName V2 > > SYMATTR Value PULSE(0 1 11 1e-6 1e-6 10) > > SYMBOL res 176 272 R0 > > SYMATTR InstName R1 > > SYMATTR Value 1 > > TEXT -256 480 Left 0 !.model SW SW(Ron=1e-6 Roff=1e7 Vt=0.5Vh=0) > > TEXT -248 512 Left 0 !.tran 0 20 0 > > > > Adjust the strays as required, and you'll probably get a pretty good > > idea of what you can expect in terms of maximum current. > > --- > > > > >Is this something best found out by experiment and a digital > > >oscilloscope? > > > > --- > > Since you'll eventually have to go real-world in order to get real data, > > the answer is: "yes". > > --- > > > > >2) Presumably, the optimal time for the armature to short out the > > >inductor coils is when the current within it is at a maximum. > > >Considering that explosives have a finite run up to detonation, how do > > >I calculate the best time to initiate the explosives? > > > > --- > > Since you now already know how long it's going to take for the the > > current in the coil to build up to a maximum, all that's left to do is > > to determine when to initiate the explosive so that as the armature > > expands it starts shorting out the solenoid's turns when the current is > > at its peak. > > --- > > > > >3) The explosives used will probably be a cylindrical charge of TNT > > >with a length of ~10cm and a radius of ~2cm. Will there be any > > >problems initiating such a small explosive? > > > > --- > > As long as the armature isn't affected by the initiator, I don't think > > so. > > --- > > > > >4) Do you have any suggestions on how the electromagnetic pulse can be > > >maximised, with a goal of destroying nearby unshielded electronics? > > > > --- > > Maybe. > > --- > > > > >5) Can you suggest any other design optimisations? > > > > --- > > Maybe. > > --- > > > > >I am willing to provide funds for quality advice if you can provide > > >evidence of your expertise. > > > > --- > > Email me if you like, with particulars, but be aware that I'm a > > registered USDoD contractor and I don't do any rogue foolishness. > > > > JF > > Can we make something that is rechargeable, concealable and capable of > killing a disco thumping SUV in traffic? No need. We already have the M-72. -- Lead free solder is Belgium's version of 'Hold my beer and watch this!'
From: Robert Baer on 15 Apr 2010 01:10 Adam Freeman wrote: > Basically a circuit consisting of an amalgamation of a Marx circuit to > generate the high seed current and an inductor wrapped around an > explosively driven armature. > > http://img651.imageshack.us/img651/3043/empbombj.pdf > > Some questions I had were: > 1) How do I find out the precise time the current through the inductor > coil will be maximum, given real conditions (e.g. finite resistances, > inductance of the Marx circuit itself, eddy currents in armature...)? > Is this something best found out by experiment and a digital > oscilloscope? > > 2) Presumably, the optimal time for the armature to short out the > inductor coils is when the current within it is at a maximum. > Considering that explosives have a finite run up to detonation, how do > I calculate the best time to initiate the explosives? > > 3) The explosives used will probably be a cylindrical charge of TNT > with a length of ~10cm and a radius of ~2cm. Will there be any > problems initiating such a small explosive? > > 4) Do you have any suggestions on how the electromagnetic pulse can be > maximised, with a goal of destroying nearby unshielded electronics? > > 5) Can you suggest any other design optimisations? > > I am willing to provide funds for quality advice if you can provide > evidence of your expertise. > > Adam Freeman Well..there may be a slight problem with timescales: Mark generators seem to run in the sub-nanosecond to nanosecond region, and explosives seem to run in the millisecondS region.
From: Robert Baer on 15 Apr 2010 01:14 Richard wrote: > On Apr 14, 4:35 pm, John Fields <jfie...(a)austininstruments.com> wrote: >> On Wed, 14 Apr 2010 04:40:04 -0700 (PDT), Adam Freeman >> >> <afreeman...(a)googlemail.com> wrote: >>> Basically a circuit consisting of an amalgamation of a Marx circuit to >>> generate the high seed current and an inductor wrapped around an >>> explosively driven armature. >>> http://img651.imageshack.us/img651/3043/empbombj.pdf >>> Some questions I had were: >>> 1) How do I find out the precise time the current through the inductor >>> coil will be maximum, given real conditions (e.g. finite resistances, >>> inductance of the Marx circuit itself, eddy currents in armature...)? >> --- >> Somebody got into this a few years ago... >> >> http://www.freeratio.org/thearchives/showthread.php?t=67081 >> >> So, since it's old news: >> >> Since you'll be dumping a charged cap into an inductance, unless it's >> critically damped it'll ring at: >> >> 1 >> f = -------------- Hz >> 2pi sqrt(LC) >> >> which is a period of: >> >> t = 2pi sqrt(LC) seconds. >> >> the maximum current in the circuit will occur 90� after the switch >> connecting the cap to the inductor is made, which will be at: >> >> 2pi sqrt(LC) >> t = ------------- seconds. >> 4 >> >> If you don't already have it, download a copy of LTspice from: >> >> http://www.linear.com/designtools/software/ >> >> and run this: >> >> Version 4 >> SHEET 1 880 680 >> WIRE -112 0 -272 0 >> WIRE 0 0 -32 0 >> WIRE 192 0 0 0 >> WIRE 192 64 192 0 >> WIRE 144 80 80 80 >> WIRE 0 176 0 0 >> WIRE 192 176 192 144 >> WIRE -272 288 -272 0 >> WIRE -96 288 -96 48 >> WIRE 80 288 80 80 >> WIRE 192 288 192 256 >> WIRE -272 448 -272 368 >> WIRE -96 448 -96 368 >> WIRE -96 448 -272 448 >> WIRE -48 448 -48 48 >> WIRE -48 448 -96 448 >> WIRE 0 448 0 240 >> WIRE 0 448 -48 448 >> WIRE 80 448 80 368 >> WIRE 80 448 0 448 >> WIRE 144 448 144 128 >> WIRE 144 448 80 448 >> WIRE 192 448 192 368 >> WIRE 192 448 144 448 >> WIRE -272 544 -272 448 >> FLAG -272 544 0 >> SYMBOL ind 176 160 R0 >> SYMATTR InstName L1 >> SYMATTR Value 1e-3 >> SYMBOL cap -16 176 R0 >> SYMATTR InstName C1 >> SYMATTR Value 1e-3 >> SYMBOL sw 192 160 M180 >> WINDOW 0 32 15 Left 0 >> WINDOW 3 32 44 Left 0 >> SYMATTR InstName S1 >> SYMBOL sw -16 0 M270 >> WINDOW 0 32 15 Left 0 >> WINDOW 3 32 44 Left 0 >> SYMATTR InstName S2 >> SYMBOL voltage -272 272 R0 >> WINDOW 0 -42 -1 Left 0 >> WINDOW 123 0 0 Left 0 >> WINDOW 39 0 0 Left 0 >> SYMATTR InstName V1 >> SYMATTR Value 10000 >> SYMBOL voltage -96 272 R0 >> WINDOW 0 -55 8 Left 0 >> WINDOW 3 24 104 Invisible 0 >> WINDOW 123 0 0 Left 0 >> WINDOW 39 0 0 Left 0 >> SYMATTR InstName V3 >> SYMATTR Value PULSE(0 1 0 1e-6 1e-6 10) >> SYMBOL voltage 80 272 R0 >> WINDOW 0 -55 8 Left 0 >> WINDOW 3 24 104 Invisible 0 >> WINDOW 123 0 0 Left 0 >> WINDOW 39 0 0 Left 0 >> SYMATTR InstName V2 >> SYMATTR Value PULSE(0 1 11 1e-6 1e-6 10) >> SYMBOL res 176 272 R0 >> SYMATTR InstName R1 >> SYMATTR Value 1 >> TEXT -256 480 Left 0 !.model SW SW(Ron=1e-6 Roff=1e7 Vt=0.5Vh=0) >> TEXT -248 512 Left 0 !.tran 0 20 0 >> >> Adjust the strays as required, and you'll probably get a pretty good >> idea of what you can expect in terms of maximum current. >> --- >> >>> Is this something best found out by experiment and a digital >>> oscilloscope? >> --- >> Since you'll eventually have to go real-world in order to get real data, >> the answer is: "yes". >> --- >> >>> 2) Presumably, the optimal time for the armature to short out the >>> inductor coils is when the current within it is at a maximum. >>> Considering that explosives have a finite run up to detonation, how do >>> I calculate the best time to initiate the explosives? >> --- >> Since you now already know how long it's going to take for the the >> current in the coil to build up to a maximum, all that's left to do is >> to determine when to initiate the explosive so that as the armature >> expands it starts shorting out the solenoid's turns when the current is >> at its peak. >> --- >> >>> 3) The explosives used will probably be a cylindrical charge of TNT >>> with a length of ~10cm and a radius of ~2cm. Will there be any >>> problems initiating such a small explosive? >> --- >> As long as the armature isn't affected by the initiator, I don't think >> so. >> --- >> >>> 4) Do you have any suggestions on how the electromagnetic pulse can be >>> maximised, with a goal of destroying nearby unshielded electronics? >> --- >> Maybe. >> --- >> >>> 5) Can you suggest any other design optimisations? >> --- >> Maybe. >> --- >> >>> I am willing to provide funds for quality advice if you can provide >>> evidence of your expertise. >> --- >> Email me if you like, with particulars, but be aware that I'm a >> registered USDoD contractor and I don't do any rogue foolishness. >> >> JF > > Can we make something that is rechargeable, concealable and capable of > killing a disco thumping SUV in traffic? > Now THAT i will vote for!
From: Bitrex on 15 Apr 2010 07:01
Robert Baer wrote: > Adam Freeman wrote: >> Basically a circuit consisting of an amalgamation of a Marx circuit to >> generate the high seed current and an inductor wrapped around an >> explosively driven armature. >> >> http://img651.imageshack.us/img651/3043/empbombj.pdf >> >> Some questions I had were: >> 1) How do I find out the precise time the current through the inductor >> coil will be maximum, given real conditions (e.g. finite resistances, >> inductance of the Marx circuit itself, eddy currents in armature...)? >> Is this something best found out by experiment and a digital >> oscilloscope? >> >> 2) Presumably, the optimal time for the armature to short out the >> inductor coils is when the current within it is at a maximum. >> Considering that explosives have a finite run up to detonation, how do >> I calculate the best time to initiate the explosives? >> >> 3) The explosives used will probably be a cylindrical charge of TNT >> with a length of ~10cm and a radius of ~2cm. Will there be any >> problems initiating such a small explosive? >> >> 4) Do you have any suggestions on how the electromagnetic pulse can be >> maximised, with a goal of destroying nearby unshielded electronics? >> >> 5) Can you suggest any other design optimisations? >> >> I am willing to provide funds for quality advice if you can provide >> evidence of your expertise. >> >> Adam Freeman > Well..there may be a slight problem with timescales: Mark generators > seem to run in the sub-nanosecond to nanosecond region, and explosives > seem to run in the millisecondS region. I was thinking along the same lines, I don't think a Marx generator of a reasonable size could provide the required power. The stuff that I've read says the power supplies involved are supplying mega amperes for at least several milliseconds. |