Re: 40w globe lightbulb = safe plasma ball?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Crow Leader by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla-at-lists.symmetric-dot-net>

The getter in tubes is a barium or zirconium that is burned to eat up the
last of the oxygen in the tube. That also leaves the silber or brown stuff
on the inside of the glass. It's a chemical process, not about electron
beams making a vacuum.

KEN

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, October 09, 2002 6:24 PM
Subject: Re: 40w globe lightbulb = safe plasma ball?


> Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<davep-at-quik-dot-com>
>
> > I looked in the Pupman archives and found this thread.
>
> > It seems that if there is sufficient gas in the vessel
>
> > to create streamers/corona then the evacuation is
>
> > insufficient to create hard radiation.
> > But if the walls fluoresce, X-Rays may be being produced.
>
> > Perhaps there is a threshold torr that may allow both
>
> > situations to occur.
>
>
> A curious factoid has floated up in my brain,
> from the vacuum tube days.  In the manufacturing
> process, after the vacuum was pulled, and the tube
> sealed, a 'high' voltage (unknown, presumably tube
> specific) was applied between 'something' and
> 'something else': this 'pulled' stray atoms,
> left behind by the vacuum pump, and strays
> absorbed on the elements, glass, etc, out of
> there and slammed them into the walls, typically
> leaving a silvery spot.  This was called
> 'gettering'.  IIR, one of the normal electrodes had
> an additional electrode called a 'getter', of
> no function in normal operation (being out of the
> electron path) but useful here.
>
> The relevance:
> I _speculate_ that similar MAY happen in a lightbulb,
> under Tesla excitation: _improving_ the vacuum over
> time.
>
> Independently, my guess is that which bulbs have vacuum,
> which have inert backfill varies from manufacturer to
> manufacturer and from size to size...
>
> IF my speculation is correct (IF), I would doubt that a
> backfilled bulb could be 'cleaned up', however one with
> a 'dirty vacuum' might be 'improved' enough to change
> its performance as a (potential) x-ray source.
>
> best
> dwp
>
> ...the net of a million lies...
> Vernor Vinge
> There are Many Web Sites which Say Many Things.
> -me
>
>
>
>