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The probe is the spherical part, 50 mm in diameter and made from titanium with a surface coating of titanium nitride. A Langmuir probe is a device used to determine the electron temperature, electron density, and electric potential of a plasma. It works by inserting one or more electrodes into a plasma, with a constant or time-varying electric ...
This is known as the single-probe method. (b) The surface areas are very small in comparison with the dimensions of the vessel containing the plasma and approximately equal to each other. This is the double-probe method. Conventional Langmuir probe theory assumes collisionless movement of charge carriers in the space charge sheath around the probe.
A ball-pen probe [1] is a modified Langmuir probe used to measure the plasma potential [2] in magnetized plasmas. The ball-pen probe balances the electron and ion saturation currents, so that its floating potential is equal to the plasma potential. Because electrons have a much smaller gyroradius than ions, a moving ceramic shield can be used ...
Other academic advisors. Walther Nernst. Irving Langmuir (/ ˈlæŋmjʊər /; [2] January 31, 1881 – August 16, 1957) was an American chemist, physicist, and engineer. He was awarded the Nobel Prize in Chemistry in 1932 for his work in surface chemistry. Langmuir's most famous publication is the 1919 article "The Arrangement of Electrons in ...
A Langmuir probe is a wire, stuck into a plasma, which absorbs the surrounding charged particles. You can vary the voltage on this wire. As the voltage changes, the charged particles absorbed change, making an IV curve. This can be read and used to measure the density and temperature of the nearby plasma. A triple Langmuir probe [19] A dozen ...
The main diagnostic is the movable probe. The relatively low electron temperature makes probe construction straightforward and does not require the use of exotic materials. Most probes are constructed in-house within the facility and include magnetic field probes, [ 9 ] Langmuir probes , Mach probes (to measure flow), electric dipole probes and ...
Researchers studying this field use tools such as Electron Cyclotron Emission, Thomson Scattering, magnetic diagnostics, and Langmuir probes to gauge the PLH (energy needed for the transition) and seek to lower this value. This confinement is a necessary condition for sustaining the fusion reactions, which involve the combination of atomic ...
Fast Scanning Langmuir probe system; Gas Puff Imaging Diagnostics; Bolometer for imaging Divertor radiations; Almost all of the diagnostic devices installed on SST-1 are indigenous and are designed and developed by Diagnostics Group of Institute for Plasma Research. This group is the only group working on plasma diagnostics and related ...