We converted a 19 inch bell jar evaporator into a plasma discharge system
(see Figure 2). A Nd-B-Fe cylindrical magnet, 1cm radius and
1cm thick with surface field approaching 5 kG, was mounted on a stainless
rod through a rotating feedthrough to a computer controlled motor. Two
high voltage electrodes were mounted on either side of the magnet, each
with its own high voltage power supply. Fragments of a Sylvania Cool-White
fluorescent tube were used, glass side up as an X-ray detector, phosphor
side up as an electron detector. A roughing pump was used to bring the
pressure of the system down to a value of 
20 mTorr. A needle leak
valve was used to establish higher pressures by bleeding in either
Nitrogen or Helium gas. Several digital cameras were used to take
pictures, beginning with two 8-bit color cameras followed by two 16-bit
astronomy cameras.