Langmuir probe - Wikipedia
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 potential between the various electrodes or between them and the surrounding vessel.
electrodes: In order to create plasma voltage is applied across two electrodes (a cathode and an anode) producing an electrical discharge current in the gas while the third electro de is used as the Langmuir probe .
The simplest collecting Langmuir probe is a metal-lic electrode (as those of Fig. 1) with a well defined ge-ometry (planar, cylindrical or spherical). The probe is immersed into the plasma and polarized to the poten-tial V p by anexternal circuit. Thisbias toV = V p−V sp the probe with respect to the local space plasma po-tential V sp. Then ...
A Langmuir probe consists of a bare wire or metal disk, which is inserted into a plasma and electrically biased with respect to a reference electrode to collect electron and/or
Plasma physicists use Langmuir probes in low temperature plasmas1 approximately a few electron volts to measure the plasma density, electron temperature, and the plasma poten-tial. A Langmuir probe consists of a bare wire or metal disk, which is inserted into a plasma and electrically biased with
The plasma is ignited by applying a bias across two of the electrodes within the tube, while the third electrode serves as a Langmuir probe. While this version is more limited, it has the advantage of being relatively simple, self-contained and inexpensive.
Jun 26, 2007 · Langmuir’s method involves the measurement of electron and ion currents to a small metal electrode (or Langmuir probe) as different voltages are applied to the probe. This yields a curve called the probe characteristic of the plasma.
An Introduction to Langmuir Probes for Space Research
Early in the history of plasma physics Sir William Crookes employed a probing electrode which he termed an “idle pole” to explore the distribution of potential in a gas discharge. A quarter of a century later Langmuir showed (References E and G) that a...
The Langmuir probe is a small electrode which is submerged in plasma in order to measure the probe current-voltage characteristic. The same characteristic is processed further to derive the electron and ion concentration, the electron distribution function, and the …
Langmuir Probe | Plasma Diagnostics, Analysis & Research
May 28, 2024 · At its core, a Langmuir Probe operates by inserting a conductive electrode into a plasma. By varying the voltage applied to the probe and measuring the resulting current, researchers can obtain the plasma’s I-V (current-voltage) characteristic curve.
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