The Turn Of The Century Electrotherapy Museum
(C) Jeff Behary 2011 

Museum Archives:           2011C 2011B
2011A 2010E 2010D 2010C 2010B 2010A 2009E 2009D 2009C
2009B 2009A 2008C 2008B 2008A 2007B 2007A 2006 2005
Museum Technology Library Tesla Kinraide Fischer Products Links Contact

Some X-Ray Experiments To Reduce Inverse Discharge
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 "make" current.

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