Probe diagnostics of waveguided discharges in an external magnetic field

Djermanova, Nina; Kiss’ovski, Zh; Kolev, St; Schlüter, H.; Shivarova, A.; Tarnev, Kh.

doi:10.1016/s0042-207x(02)00323-8

Cited by 4 publications

(13 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[39][40][41][42][43][44][45][46]) which motivate aspects of the reported modelling are also pointed out in the review.…”

Section: Introductionmentioning

confidence: 86%

“…This is related to the reduction of the transverse ambipolar diffusion coefficient (4.4) when an external magnetic field is present. As the experiments [44,152,153,288] show, depending on the frequency of the wave sustaining the discharge, plasmas in volume from one litre till few litres can be sustained by applying high-frequency power of the order of 10 W.…”

Section: Trivelpiece-gould-mode-sustained Discharges In a Weak Externmentioning

confidence: 99%

“…Table 1 and Figs. [44][45][46][47] show results for the plasma parameters and for the axial structure of the discharge. In Table 1 and Figs.…”

Section: Axial Self-consistent Structure Of the Dischargementioning

confidence: 99%

See 2 more Smart Citations

Travelling-wave-sustained discharges

Schlüter

Shivarova

2007

Physics Reports

Self Cite

View full text Add to dashboard Cite

“…[39][40][41][42][43][44][45][46]) which motivate aspects of the reported modelling are also pointed out in the review.…”

Section: Introductionmentioning

confidence: 86%

Section: Trivelpiece-gould-mode-sustained Discharges In a Weak Externmentioning

confidence: 99%

See 1 more Smart Citation

Travelling-wave-sustained discharges

Schlüter

Shivarova

2007

Physics Reports

Self Cite

View full text Add to dashboard Cite

“…It has been shown that the discharges produced by travelling Trivelpiece-Gould (TG) modes meet the requirement for high-efficiency. Depending on the frequency of the wave sustaining the discharge, plasmas in volumes from a litre till few litres can be produced in a diffusion-controlled regime by applying high-frequency power of the order of 10 W [1,2,3,4]. This high efficiency is related to the reduction of the transverse ambipolar-diffusion coefficient with the increase of the external magnetic field since, as it is well-known, the discharge needs as much power as necessary for sustaining ionization which is enough to compensate the charged particle losses.…”

Section: Introductionmentioning

confidence: 99%

Trivelpiece‐Gould mode produced gas‐discharges in a diffusion‐controlled regime

Schlüter¹,

Shivarova²,

Tarnev³

2003

Contrib. Plasma Phys.

View full text Add to dashboard Cite

The study presents a numerical fluid-plasma model of waveguide discharges sustained by travelling azimuthallysymmetric Trivelpiece-Gould modes. The results describe weakly-magnetized ( ª ) plasma production in a diffusion-controlled regime ( being the wave frequency, ª the electron gyro-frequency). However, with respect to the influence of the external magnetic field on the transverse ambipolar-diffusion coefficient, cases of both weak and strong impact of the magnetic field are covered. In its electrodynamical part, the model involves detailed description of the behaviour of the Trivelpiece-Gould waves in radially-inhomogeneous collisional plasmas. The gas-discharge part of the model specifies plasma production in an argon gas. The results are for the self-consistent structure of the discharge composed out of the interrelated variations of wavenumber, space damping rate, plasma density, electron temperature and power absorbed on average by an electron. The analysis is in terms of influence of gas-pressure and magnetic-field changes.

show abstract

“…In this study the design of data acquisition system is presented, which ensures accurate measurements of the current-voltage (I-V) single probe characteristics without current sensing resistor. Current sensing resistor is the conventional and simplest method of measurements [9,[26][27][28], but although simple to implement, there are certain problems with this approach. If the resistor is floating, a differential voltage signal has to be converted additionally before it is measured by a grounded oscilloscope.…”

Section: Introductionmentioning

confidence: 99%

EEDF Determination by Numerical Processing of the Probe Data in Neon DC Discharge

Djermanova

Kiss’ovski

Tsankov

2006

Contrib. Plasma Phys.

View full text Add to dashboard Cite

Numerical processing of the data from single probe measurements allows determination of the electron energy distribution function (EEDF) from the second derivative of the probe current. The current-voltage probe characteristics are measured by acquisition system for further smoothing and differentiation. The developed procedure is a combination of the Savitzky-Golay (S-G) smoothing filter and three-point differentiator with varying step. The above methods are modified for irregularly sampled data which enables more accurate determination of EEDF. Advantages of this approach are data smoothing with minimum information loss and improved noise reduction at the differentiation procedure. The procedure is applied for EEDF calculation in low current low pressure neon discharge. The shape of EEDF shows deviation from both Maxwellian and Druyvesteyn distributions.

show abstract

Probe diagnostics of waveguided discharges in an external magnetic field

Cited by 4 publications

References 22 publications

Travelling-wave-sustained discharges

Travelling-wave-sustained discharges

Trivelpiece‐Gould mode produced gas‐discharges in a diffusion‐controlled regime

EEDF Determination by Numerical Processing of the Probe Data in Neon DC Discharge

Contact Info

Product

Resources

About