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X
This is an X-ray tube
complete with the housing
bought from ebay unfortunately it's broken
The tube itself was oil cooled, there's two pipes for the oil
high-voltage connection goes in here
and on the front
this is the window where x-rays are emitted
It came complete with filters that The actual x-ray tube can be seen in here
but the thread is not quite right
the actual x-ray tube can be
seen in here
these two wires are the heater
wires
This front cover off this is the beryllium window the x-rays are emitted from
and this connection is part of the heater which goes onto this part of the tube
unscrew housing
Another heater connection there
And this should release the
tube assembly
I've removed the oil from inside
and that is the anode connection on the spring
which connects to the
connector in the housing
here
this is the little
x-ray tube its self
If we look closely
there's a couple of small
gettas here
and they are actually white
which suggests that there is probably
air in the vacuum
well air has got in there is no point trying
to run up the heaters they will smoke and burn out we could try and confirm by putting HT on it
I've connected the anode
and one side of the heater to the high voltage supply if I turn the voltage up
you should hear break down if there is air in it
that's just one kv
2 kV
ah
at 10 kV you can hear
the clicking noise
of the arc inside the tube
so we've confirmed we've lost the vacuum
and we have a paper wieght rather than an x-ray tube
no signs of where it's actually
let in air other than a very very small
dent on the
beryllium window
just here
it does not look bad but it may be just enough to have let air in
there are no cracks in the glass
It's worth looking inside it cuz
being as this is the window
where the x-rays come out and the anode is here
I;m not sure how the construction would be
normally in an x-ray tube like this one
we have the heaters here
and the anode here and the anode is angles so the beam strikes it and x-rays are emitted here
tried that hot wire technique but it did not work well but it did manage to
break the glass eventually
but
not a very clean break
rather interesting this looks like the the actual anode target here
possibly copper
anode
the heater is still inside here I can buzz it out
one connection there and to the other
so somewhere in here there is still
a heater
there's a little bit
strange marching on the beryllium window
just on the inside
from this dent here
possibly that's where the vacuum failed
can't quite see the heater
guessing it's in there, need to break this open to see
confirmed its the window if I put a very very bright light on the back of the
window
you can just make out a
speck of light gets through
that's where we lost the vacuum
or where air got in
connected up the heaters here rather than take it part
you can just see the glow
from the heater
oops that's the end of the heater