A comparison of two rocket borne Langmuir probes having electrodes of different materials

Computer Science – Sound

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Electrodes, Electron Energy, Electrostatic Probes, Ionospheric Sounding, Rocket-Borne Instruments, Aluminum, Protective Coatings, Stainless Steels, Temperature Measuring Instruments

Scientific paper

The behavior of two types of Langmuir probes, one with electrodes made of low-sulfur stainless steel and one with electrodes made of aluminum coated with Aquadag, has been compared on two rocket flights. Each rocket payload included one Langmuir probe of each type. The electron temperatures measured with the stainless-steel electrodes were about 15% higher than the electron temperatures measured with the Aquadag-coated electrodes at 150 km on ascent and about 10% higher at 180 km. These results imply that the use of Aquadag coated electrodes or electrodes of other carefully chosen materials permits greater reliability in the measurement of electron temperatures in the ionosphere by the Langmuir probe technique.

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