Search found 101 matches

by Werner Engel
Sat Mar 21, 2015 5:04 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Anode layer ion source. Operation pictures
Replies: 70
Views: 72979

Re: Anode layer ion source. Operation pictures

Hi Andrew! Congratulations to your final picture (the one showing the interference pattern)! It's an enormous amount of work doing this @10,6µm with all the special materials. The carbon-pipe is it really stiff enough? What about vibrations from the roughing pump? Or did you switch off pumping durin...
by Werner Engel
Sat Mar 21, 2015 10:38 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: $10,000 Budget
Replies: 10
Views: 6746

Re: $10,000 Budget

Hi Kuba! When I started planning my fusor, I also wanted to buy a perfect sphere as my first investment. Excellent equipment was also around 6000€ without electro polishing on the inside. I asked at Pfeiffer, Lesker, VACOM and several others delivering to local uni-institutes. Soon I found out that ...
by Werner Engel
Fri Mar 20, 2015 6:12 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Anode layer ion source. Operation pictures
Replies: 70
Views: 72979

Re: Anode layer ion source. Operation pictures

Hi Andrew!

Great that you still work on the fusor! Thanks for all your posts - great pictures and details!

What kind of "laser density probe" do you use in this case?
Interferometry, reflectometry, scattering, refractive index?

BR,
Werner
by Werner Engel
Fri Dec 12, 2014 9:23 pm
Forum: Images du Jour
Topic: Archived - European Fusor
Replies: 22
Views: 12140

Re: Archived - European Fusor

Today we started to stick the first parts together.
The doublecross is DN100.
The windows are not AR coated yet, but will be ...
by Werner Engel
Tue Nov 04, 2014 6:00 pm
Forum: Images du Jour
Topic: Archived - European Fusor
Replies: 22
Views: 12140

Re: Archived - European Fusor

I bought it about a year ago for about 1.400€.
They still have it on stock, you have to ask for it. The 100kV is about 3250€.

BR,
Werner
by Werner Engel
Sat Nov 01, 2014 10:13 am
Forum: Images du Jour
Topic: Archived - European Fusor
Replies: 22
Views: 12140

Re: Archived - European Fusor

The 70 kV HV feedthrough in it's parking position, resting on the ISO-KF flange. I used a Lab-Boy with a hole in the top-table to let the electrode go through the table.
It will be connected to the DN100 ISO-KF doublecross shortly!
by Werner Engel
Sat Oct 25, 2014 4:23 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: New HF Driver Idea
Replies: 37
Views: 19566

Re: New HF Driver Idea

And what is the core made of?
I used the following: http://uk.rs-online.com/web/p/transform ... s/0180834/
by Werner Engel
Sat Oct 25, 2014 4:07 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: New HF Driver Idea
Replies: 37
Views: 19566

Re: New HF Driver Idea

The frequency you should use depends on a lot of parameters. There is the inductivity, the material of the core, the load, the geometric of the core (air gap), ... I found out it's quite difficult to build a HV transformer. Try to vary the frequency and measure the voltage. Working on it - see the p...
by Werner Engel
Wed Jul 16, 2014 7:55 am
Forum: Images du Jour
Topic: Archived -Completed vacuum system and first plasma!
Replies: 3
Views: 1584

Re: Completed vacuum system and first plasma!

Nice and tidy pictures.
To increase vacuum quality you should change the teflon-tape to KF or CF fittings.
Which turbo and drag pump did you use?
And the HV-PS?
by Werner Engel
Sun Jul 06, 2014 9:41 am
Forum: Images du Jour
Topic: Archived - European Fusor
Replies: 22
Views: 12140

Re: European Fusor

This is the Turbo pump. A brand new Pfeiffer HiPace 80, with 48 Liters/sec for hydrogen. It can reach 5x10e-10 mbar - connected via the DN 63 CF-F flange. The external aircooling is not realy used as the gasload ist not so high. I reduced to KF40 using a elbow valve which works fine for this use. Th...