Re: Magnetron sputter system
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Well I looked up the specs for the tantalum box and it is 257 amps at 1.4 volts requiring 360 watts.? I have 12 vac at 500 amps available so I presume I have enough power.?
I also looked up the current carrying capacity of the 3/8" dia steel threaded rods that make up the pass thru's.? It was very much less than it needed to be.? So I will be changing out the two 3/8" steel rods for two 1/2" copper rods and between the two parallel pass thru's I should have a true 500 amps rated capability.? I am also stepping up to 4 each power feeds leading to the tantalum box and 4 each leads going to chamber ground.? Each lead should be 90 amps so that is 360 amps of capability leading to and exiting away from the box. ?
The main feeds to the pass thru's are 3/4" copper stranded cable so that is 500 amp plus. ?
Along with cleaning up all contacts and eliminating all stainless steel conductors in the system I think the next time I power the system up it will glow white hot only where it is supposed to and not along the path. ?
This electricity stuff is nearly as tricky as vacuum. ? ? ??
On Thu, Oct 30, 2014 at 5:19 PM, Lindsay Wilson lindsay@... [VacuumX] <VacuumX@...> wrote:
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Hi,
Lurker here ;-)
The only advice I could suggest - I think that when you get into
the 1000A range, you really need to go with water-cooled
feedthroughs.
Lesker, for example, have a 400A non-cooled feedthrough, but their
1000A feedthrough is water-cooled. Page here:
I've forgotten much of what I ever knew about thermal coating, but
is it possible to use a wire basket heater instead of the boat? Or
is
the silicon dioxide in powder form and would fall through?
Best regards,
Lindsay
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