On the Measurement of Electron Temperature of a Pulsed Washer Gun Argon Plasma by Triple Langmuir Probe Diagnostic Technique: ELECTRON TEMPERATURE OF PULSED PLASMA BY TRIPLE PROBE METHOD

Bipin Kumar Sethy; Rita Paikaray; Parthasarathi Das; Subrata Samantaray; Narayan Chandra Sasini; Biswambhar Mohanty; Gourishankar Sahoo; Amulya Kumar Sanyasi; Joydeep Ghosh

doi:10.56042/jsir.v83i4.2407

Authors

B K Sethy Department of Physics, Ravenshaw University, Cuttack, Odisha 753 003, India
R Paikaray Department of Physics, Ravenshaw University, Cuttack, Odisha 753 003, India
P Das Department of Physics, Ravenshaw University, Cuttack, Odisha 753 003, India
S Samantaray Department of Physics, Christ College, Cuttack, Odisha 753 008, India
N C Sasini Department of Physics, G. C. College, Jajpur, Odisha 755 003, India
B Mohanty Department of Mathematics and Science, G P, Jajpur, Skill Development & Technical Education, Odisha 755 019, India
G Sahoo Department of Physics & Astronomical Science, Central University of Himachal Pradesh, Shahpur Parishar 176 206, Himachal Pradesh, India
A K Sanyasi Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India
J Ghosh Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India

DOI:

https://doi.org/10.56042/jsir.v83i4.2407

Keywords:

Electron temperature, Low pressure plasma, Pulsed plasma, Triple probe, Washer gun

Abstract

Pulsed argon plasma of the order of 140 μs duration is produced by a washer gun under low pressure conditions. The low pressure plasmas have many industrial applications such as etching, coating for corrosion, diamond and diamond like carbon coating, super hard nano composite coating, synthesis of novel nanostructure etc. Measurement of fundamental parameters like electron temperature of such pulsed plasmas is always challenging and should be determined properly. Triple probe diagnostic is the most advanced, convenient and inexpensive method for measurement of plasma temperature which does not require any voltage, frequency sweeps, or switching like single or double probe diagnostic methods. In this work we have introduced a triple Langmuir probe to measure the electron temperature of pulsed washer gun argon plasma. A triple probe of pure tungsten material with appropriate circuit is designed and fabricated in our laboratory. The triple probe signal is recorded by a digital storage oscilloscope at the distance of 0.05 m from the gun mouth. It is observed that the electron temperature remains constant at ⁓ 1.2 eV within the small variation of base pressure ranging from 0.2 to 1.0 mbar. This method is applicable to both stationary and transient plasma which can be used for various industrial as well as research purpose.