Hot Cathode

by Kian Rahbarnia

research associate


In a low pressure argon gas atmosphere a lanthanum hexaboride electrode is heated up to 1500 degree Celsius. Emitted electrons ionize the gas and due to a uniform background magnetic field a directed plasma stream is formed. Its blue inner core reaches electron temperatures of several 100000 degree Celsius. Amongst others such well-defined plasma channels allow to study phenomena happening on the sun in a laboratory on earth.

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