Search found 76 matches

by Andrew Haynes
Sat Feb 11, 2017 4:16 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Plasmagun/railgun for Stelarate
Replies: 31
Views: 19227

Re: Plasmagun/railgun for Stelarate

This is the prototype that I will be using. Data H value ???? Volts. uF. Bv. Nogap vp ? 1.5a. 9kv. 1. 1 m/sec,a a = approx. Things I noticed, potassium ion are quite conductive. There's a lot of back pressure in a pipe. With a magnetic the positive ion travel one direction compared to electrons, tha...
by Andrew Haynes
Wed Feb 08, 2017 3:59 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Plasmagun/railgun for Stelarate
Replies: 31
Views: 19227

Re: Plasmagun/railgun for Stelarate

Hi, I entered the data on hyperphysic website for the mean free path, at standard temperature compared to 20kK was a 100 magnitude longer, lowering to 1kPa at the outlet, should get the length enough, with the voltage drop around the coil ,parallel, should or maybe accelerate it enough. I don't want...
by Andrew Haynes
Sun Feb 05, 2017 1:10 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Plasmagun/railgun for Stelarate
Replies: 31
Views: 19227

Re: Plasmagun/railgun for Stelarate

@Dennis P Brown The idea is to have a 10 turn coil about 500*200mm, made of steel pipe 10mm Id with 16mm Od, at each turn a spark gap and magnetic . I'm not sure of the induction but if I can get a couple thousand amps flowing throughout the plasma would be good. The pulse should get to 20000K incre...
by Andrew Haynes
Sat Jan 28, 2017 8:10 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Plasmagun/railgun for Stelarate
Replies: 31
Views: 19227

Re: Plasmagun/railgun for Stelarate

Tested the ions the morning, it easily breaks down the gap, with the pulse A lot quicker. I can't get any picture's from the videos, it's just a white screen.
The spark gap was at 10mm, just a little bet of vapours was enough to arc.
by Andrew Haynes
Sat Jan 21, 2017 1:23 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Plasmagun/railgun for Stelarate
Replies: 31
Views: 19227

Re: Plasmagun/railgun for Stelarate

@Dennis P Brown Good idea, I normally disconnect the power supply a use insulated pliers to short a capacitor bank with a wire, then tie it together while I work on the circuit. Microwave oven capacitor have a internal 10Mohm bleeder resistor, it saved me have a voltage balancer network. I,ve had so...
by Andrew Haynes
Wed Jan 11, 2017 7:58 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Plasmagun/railgun for Stelarate
Replies: 31
Views: 19227

Re: Plasmagun/railgun for Stelarate

@Robert Tubbs. I was planning to ,too see how the plasma reacts. After I get enough caps to make aluminium vapour a second spark gap will heat up the gas, and accelerate it fast. Still working out how to make the plasma stay in the torrid , if it's anything like a plasma cutter, the chamber might no...
by Andrew Haynes
Mon Jan 09, 2017 6:25 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Plasmagun/railgun for Stelarate
Replies: 31
Views: 19227

Plasmagun/railgun for Stelarate

I thought it might be interesting to some members of the type of project. It's a stelarate which is a donut shaped device. Plasma flows around the ring creating a circulating current. At the moment I'm working on the plasma injector. The final goal is a plasma velocity in the 3km/sec range. I'm slow...
by Andrew Haynes
Sat Dec 03, 2016 7:27 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High speed HV mosfet switch
Replies: 12
Views: 5334

Re: High speed HV mosfet switch

This is what I meant if wanted, once the zener conducted it changes the voltage divider to always stay on, the only way to stop it conducting is a negative back elf which is made at the speed the zener switch off from Alachua other it stays on.
by Andrew Haynes
Sat Dec 03, 2016 3:41 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High speed HV mosfet switch
Replies: 12
Views: 5334

Re: High speed HV mosfet switch

Just curious Andrew, but can't pull up or down resistor be replaced with secondary of a transformer, with a fixed reference to collector by resistor or zener make the desired voltages, Etc a Npne the zener on the gate and emitter, and the transformer sec gate to collector. You still have to protect ...
by Andrew Haynes
Fri Dec 02, 2016 6:58 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High speed HV mosfet switch
Replies: 12
Views: 5334

Re: High speed HV mosfet switch

You can easily series mosfet,with a parallel forward voltage drop of diodes, they have to be less than Bv and together, based on npn enhanced type, and nh5001 diodes, 8_14v drop

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