Pawandeep Singh
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View article: Sheath effects with thermal electrons on the resonance frequency of a DC-biased hairpin probe
Sheath effects with thermal electrons on the resonance frequency of a DC-biased hairpin probe Open
The dielectric constant of the sheath—whether ionic or electronic—formed around the cylindrical limbs of a hairpin probe is often assumed to be the same as the vacuum value when used in low-temperature plasmas. However, this assumption doe…
View article: Sheath effects with thermal electrons on the resonance frequency of a DC-biased hairpin probe
Sheath effects with thermal electrons on the resonance frequency of a DC-biased hairpin probe Open
The dielectric constant of a sheath, whether ionic or electronic, formed around the cylindrical limbs of a hairpin probe, is often considered the same as that of a vacuum. However, this assumption does not hold true for electron sheaths an…
View article: Development of Volume Produced Negative Ion Source using a CCRF Discharge
Development of Volume Produced Negative Ion Source using a CCRF Discharge Open
This work shows the development of a volume-produced negative ion source that consists of annular parallel plates driven by a 13.56 MHz capacitively coupled radio frequency in a push-pull configuration. This source shows advantages in cont…
View article: Determining sheath edge electric field around cylindrical pins of a DC-biased hairpin resonator probe
Determining sheath edge electric field around cylindrical pins of a DC-biased hairpin resonator probe Open
The sheath-edge electric field ( ) is an important parameter to patch the quasi-neutral pre-sheath and non-neutral sheath regions. The choice of significantly influences the theoretically estimated values of the sheath width,…
View article: Volume dependence of Grüneisen parameter for γ-Fe2O3 nanomaterial
Volume dependence of Grüneisen parameter for γ-Fe2O3 nanomaterial Open
We have determined pressure-volume relationship, bulk modulus and its pressure derivatives up to third order for γ-Fe2O3 nanomaterial. We have used the Holzapfel AP2 EOS which has a fundamental physical origin based on the Thomas-Fermi ele…
View article: Discharge characteristics of a low-pressure geometrically asymmetric cylindrical capacitively coupled plasma with an axisymmetric magnetic field
Discharge characteristics of a low-pressure geometrically asymmetric cylindrical capacitively coupled plasma with an axisymmetric magnetic field Open
We investigate the discharge characteristics of a low-pressure geometrically asymmetric cylindrical capacitively coupled plasma discharge with an axisymmetric magnetic field generating an EXB drift in the azimuthal direction. Vital dischar…
View article: Magnetic Field Induced Electron Temperature Inhomogeneity Effects on Discharge Properties in Cylindrical Capacitively Coupled Plasmas
Magnetic Field Induced Electron Temperature Inhomogeneity Effects on Discharge Properties in Cylindrical Capacitively Coupled Plasmas Open
View article: Equilibrium properties of inhomogeneous partially-magnetized plasma containing negative ions
Equilibrium properties of inhomogeneous partially-magnetized plasma containing negative ions Open
This paper presents an analytical model for inhomogeneous, partially-magnetized electronegative plasma. It is shown that the radial potential of the plasma can be related to the electronegativity parameter , the positive ion d…
View article: Addressing the anomalies in determining negative ion parameters using electrostatic probes
Addressing the anomalies in determining negative ion parameters using electrostatic probes Open
The negative ion density and temperature are the two fundamental parameters that are necessary to quantify the properties of electronegative discharges. However, determining these parameters by means of electrostatic probes can be quite ch…
View article: Equilibrium potential profile across magnetic field in inhomogeneous electronegative plasma
Equilibrium potential profile across magnetic field in inhomogeneous electronegative plasma Open
This paper presents the plasma potential distribution across magnetic field lines in an argon/oxygen plasma created by 13.56 MHz CCRF discharge consisting of a pair of ring electrodes. It is found that the radial plasma density, electron t…