--- In VacuumX@..., Gomez <gomez@o...> wrote:
On Wednesday, October 29, 2003, at 05:54 PM, nano_tronics wrote:
about the no4 question what kind of vacuum are we taking about in
CTR
tubes with the getter are they in the high vacuum range or in the
ultra high vacuum range
NO4?? I didn't see that. I've no idea what you're talking about.
and if all precaution are take ex ( real good cleaning , glow
discharge, vacuum baking, ect ) can it be possible to go in the
UHV
range without degradation for a permanently seal vacuum tube made
of
low outgasing material or will it need to be pumped as long as
need
to stay in this range
Someone else who knows more should answer this, but I see no
reason
why a good clean tube connected to a good HV system could not go UHV
once it's sealed and the getter fired properly. But my knowledge of
amateur-made permanently sealed UHV devices is sketchy at best!
the unit you are using is it torr, mbar or pas
Any time you see someone talking about vacuum in terms of 1 x 10
^ -n,
they are probably talking about torr. That's the only term I'm very
familiar with, although I know there are others, and it's what all
the
gauges I've seen are calibrated in. Even though Torr is a stupid
unit
of measure. :)
- Gomez
.....................................................
Cryptographer Barbie says, "Gee, security is _hard_!"
ok now i understand , i tought that to have an UVH in a closed seal
container it was needed to be pumped as long as it need to be
substained because of constant outgasing of container material i
understand that the getter play a big roles in stabilyzing the vacuum
if every proceding step is taken care of for reaching the UVH barrier
and torr can be translate to hg/mm i ask this question because it
gets confusing when looking for spec for VD pumps many of them are in
mbar some in pascal and other in torr i prefer to work with torr too
it is less confusing
