Fusion Message Board

In this space, visitors are invited to post any comments, questions, or skeptical observations about Philo T. Farnsworth's contributions to the field of Nuclear Fusion research.

Subject: Re: strip sphere electrodes
Date: Nov 08, 5:40 pm
Poster: d.preston

On Nov 08, 5:40 pm, d.preston wrote:

we can machine any metal. i have .005 tantalum and can check on the availability of tungsten sheet.

btw just because a SS wire grid melts doesn't mean a SS strip one will. btw ss is pretty poor for high temp applications, there are other fe alloys much better suited.

you might want to try a ir-cr-al type super alloy or a ni-crome. we use such alloys for our burners where in some applications they operate red hot for thousand of hours without errosion. many of these alloys have been designed to push the envelope of high temp applications ie. jet turbines blades and in our case burners.

as far as design, i have been working on several geometries. or if you like specify exactly what you want and we can fab it.


daniel preston
preston automation inc.
718-596-8641 ph
718-596-8646 fx

>What material would the grids be made out of? I have been trying to get a hold of tungsten because stainless steel melts too quickly but can't find a local dealer who has it in stock. I might be interested in the device. If so, I would need 5-8 grids (from 1.5" in diameter to about a foot). Do you have the standard design for a fusor grid (it's in one of Tom Ligon's articles).
>>My company has developed a process for micro machining thin materials. It is a semiconductor etching process which we have applied materials ranging from silicon wafers to fecromal super alloys to tungsten. We are patpending on specialty burners that are created from laminations created with the above process.
>>I have been giving thought to manufacturing spherical IEC electrodes not from wire but from strip.
>>Even though we perform the above process in house there are hard costs involved. If i tool up to produce a batch of electrodes would anyone on this list be interested in purchasing.
>>i have envisioned spheres using 4 or 6 rings.
>>please let me know what dimensions you would be most interested in.
>>once we micro machine the ring components they would interlock together and we could weld them together. we have several micro welders ranging from unitek fusion, and spot tweasor welders to micro plasma tigs. (we can seamlessly weld aluminum foil).