Uranium & Noviol Glass-Xenon Gas Geissler Tube, New
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T his is a new handmade xenon gas filled plasma tube that measures 12" long by 1 1/8" in diameter, and is made from uranium, noviol and clear glass. This decorative glass tube is made in the same tradition as old Geissler tubes, but filled with xenon gas instead of low pressure air or nitrogen. Uranium glass was used extensively in many of the Geissler discharge tubes made around the turn of the last century, and this modern tube also contains old stock uranium glass in the base of the bottle. Uranium oxide in the glass gives it a fluorescent greenish color that glows brightly when the tube is energized. Curiously, it's slightly radioactive, but completely harmless. The yellow colored glass is old stock noviol neon tubing, and the clear glass is a barium-strontium lead free glass. Another thing that sets this tube apart from antique Geissler tubes is the rare gas that it is filled with. Xenon, the rarest and heaviest of the stable noble gases, is used in this tube at a specific pressure that causes it to form a luminous thread-like discharge that can take on several different appearances, depending on the type of power supply used and how it is connected. The discharge can be very active and fast moving, or slowed down to an undulating crawl. Different effects can be produced by changing the frequency and power going to and through
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