Demo fusor build 2.0

For posts specifically relating to fusor design, construction, and operation.
Post Reply
steven vr
Posts: 3
Joined: Thu Dec 27, 2018 6:50 pm
Real name: steven van ruijssevelt

Demo fusor build 2.0

Post by steven vr » Sun Dec 30, 2018 7:38 pm

Time for upgrading the demo fusor to a stainless steel chamber instead of the Bell jar i have used in my previous setup. Found a auction in the netherlands (https://www.iveindhoven.com/page/3/?s=v ... e=voorraad), they have huge stock of used vacuüm parts, turbo pumps, valves, flanges, you name it! Managed to pick up a nice 10 cm diameter vacuüm chamber with a nice vieuwport.
49090692_530837330758514_7454408817338482688_n.jpg
My vacuümpump is a 2 stage rotary pomp. Max. vacuüm: 0,0215 mbar/ 15 micron, yet to confirm because no propper gauge at hand.

https://www.vosinstrumenten.nl/onderwij ... p-vos.html

In eindhoven they offered me a deal on this Leybold Turbovac 150 CSV turbo vacuümpomp with controller and cables, heater element, cooling,...and it will fit on my new vacuum chamber. I will pick it up later this month, + a better vacuüm gauge.
49051949_1972541972858582_5689398363598880768_n.jpg
Power supply is a Klinger neon transformer, controled with a old Variac i picked up at a local store. I am building a full wave brige rectifier with 4 diodes i have to convert to dc. The transformer is only 3.15 kv 63 mA. Yet to find a better power supply. Not easy to find here in Belgium.

https://www.tweedehands.nl/witgoed-appa ... 90084.html

With this modest setup i had some nice looking plasma in the chamber, i could do some tests with argon i have from the welder. First fixing some leaks.
49001948_318617028774962_2650359747823271936_n.jpg
49098482_219618098970949_8021811616758628352_n.jpg
49079324_288572382002710_6063760958797381632_n.jpg
Last edited by steven vr on Mon Dec 31, 2018 10:55 am, edited 1 time in total.

John Futter
Posts: 1339
Joined: Thu Apr 22, 2004 2:29 am
Real name:
Contact:

Re: Demo fusor build 2.0

Post by John Futter » Mon Dec 31, 2018 6:35 am

please learn how to attach the correct size photos to your post so that they are stored on this forum and not some third party viewer site
later many will want to see what you have done and if the viewer site you have selected has gone /you are not a member/payer anymore or whatever else causes web sites to dissapear this will become a wasted resource

steven vr
Posts: 3
Joined: Thu Dec 27, 2018 6:50 pm
Real name: steven van ruijssevelt

Re: Demo fusor build 2.0

Post by steven vr » Mon Dec 31, 2018 11:07 am

Pictures look ok now?

Did a test today with a smaller inner grid. the chamber is now getting way hotter then it used to be. Alsow the plasma out of the grid is making some pulsing waves, is this due to the ac power i am using now?

https://www.facebook.com/steven.vanruij ... 816237572/

and a picture of it when running for about 10 minutes.
48921912_465098564033596_5906692209486331904_n.jpg

User avatar
Dennis P Brown
Posts: 1618
Joined: Sun May 20, 2012 2:46 pm
Real name: Dennis P Brown
Location: Glen Arm, MD

Re: Demo fusor build 2.0

Post by Dennis P Brown » Mon Dec 31, 2018 2:51 pm

Nice setup; hope you secure a proper negative high voltage system. Do remember a real fusor supply is lethal.

Post Reply