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Subject: Maciej Wojdak

Date: 06/02/03 at 6:31 AM
Posted by: ask for advice Perkin-Elmer 2400
E-mail: mwojdak@phys.uva.nl
Message Posted:


I 'd like to ask other PE2400 users for some advice.

My problem is the following: when I start ignition, plasma appears under the target, but ignitor doesn't switch off.
I can increase the power and tune the matching circuit, and when forward power is high, about 600W, ignitor finnaly switches off.
But, althougth plasma is there and the forward power is high the target bias indicator is around zero.(Probably, I should not believe it.)
Sometimes, ignitor does not start at all.

This does not happen to other targets, so I suspect target contamination. But I'm not sure if this is not a failure in electric circuit.
Does anybody experienced something like this?

Maciej Wojdak

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