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High Energy | by Tanozzo
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High Energy

Originally invented by Nikola Tesla after his experimentation with high-frequency currents in an evacuated glass tube for the purpose of studying high voltage phenomena, a plasma globe is usually a clear glass orb filled with a mixture of various gases—most commonly helium and neon, but sometimes also xenon and krypton—at low pressure (below 0.01 atmosphere) and driven by high-frequency alternating current at approximately 35 kHz, 2–5 kV, generated by a high-voltage transformer. A much smaller orb in its center serves as an electrode. Plasma filaments extend from the inner electrode to the outer glass insulator, giving the appearance of multiple constant beams of colored light.

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Taken on May 26, 2013