Some X-Ray Experiments To Reduce Inverse
In An X-Ray Tube
Ritchie Coil Setup
Ritchie Coil Interrupter
Oscilloscope Tube showing Inverse Discharge. Bright rear electrode
is negatively charged on "break", but upon "make"
the front electrode becomes negatively charged but with a more feeble
current. This is enough to cause inverse discharge
in the tube however...
The small tube to the left has no vacuum, it only functions as a spark
gap. The spark gap reduces inverse discharge.
Here you can see a 1/2" spark and how it effects the polarity - it
allows the "break" current through but holds back the
Here is how the tube looks without the gap. It functions, but the
stream isn't quite as focused as it might be.
The gap allows things to be a bit
more focused. Note that the replica tubes were made by Lutz
Neumann in our Friends and Links
page. Excellent work!
Note the appearance of the tube if the polarity is reversed...
Here is a photo showing polarity in each leg of the circuit. One
oscilloscope is nitrogen, the other neon.
A Maltese Cross Tube, with correct polarity
Energized with the cross down
Wired in reverse
From Morton's book...
(C) Jeff Behary, 2011