Author Topic: Question about the MV electrode flashing purple  (Read 932 times)
bluelights
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Question about the MV electrode flashing purple « on: April 12, 2009, 01:15:28 PM » Author: bluelights
Why do the electrodes of mercury burner flash purple and pink after ignition?

« Last Edit: April 12, 2009, 02:27:37 PM by TudorWhiz » Logged

"The orange cloud looks like floating nuclear waste."
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Medved
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Re: Weird question « Reply #1 on: April 12, 2009, 01:50:47 PM » Author: Medved
It is a discharhe in the cloud of sputtered electrodes.
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bluelights
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Re: Question about the MV electrode flashing purple « Reply #2 on: April 12, 2009, 03:44:22 PM » Author: bluelights
But why it happens only a few seconds following ignition and then stops?
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Medved
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Re: Question about the MV electrode flashing purple « Reply #3 on: April 13, 2009, 07:12:26 AM » Author: Medved
The sputtering happen only on cold electrodes, so about 1..2s after ignition. Following few seconds the sputtered material is cleaned-out (back to electrodes, to the tube wall,...), so the strange color disappear.
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don93s
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Re: Question about the MV electrode flashing purple « Reply #4 on: April 13, 2009, 11:51:28 PM » Author: don93s
Also, I think the anti-sputtering emitters can't work properly until electrodes reach a certain temperature which takes a couple seconds.
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