Charging of micrometre-sized dust grains in a low temperature and low density plasma produced using a magnetic filter

Bailung, Heremba; Deka, Manoj Kr.; Adhikary, Nirab C.; Nakamura, Yoshiharu

doi:10.1088/0963-0252/19/5/055005

Cited by 6 publications

(4 citation statements)

References 22 publications

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“…Next, to study the EEDF in a low temperature and low density plasma, the plasma in the plasma device is produced only in the source section and is allowed to diffuse towards target section through the magnetic filter placed between the source and target. [29] The discharge current (I d ) in the source is varied from 50 mA to 450 mA with the discharge voltage kept fixed at 60 V. The n e and T e profile in source are shown in Fig. 5 (lower panel).…”

Section: Probe Bias Voltagementioning

confidence: 99%

“…However, this peculiar observation should be well understood, because although the electron temperature is a determinative factor in determining the dust charge but the role of plasma density cannot be neglected as indicated in earlier reports. [29][30][31] Though there is much research work on EEDF, which has reported from time to time, to our knowledge no experimental evidence is available which shows the effect of dust on EEDF in a plasma at the most fundamental level. Hence, in this paper, based on the techniques for the determination of EEDF from the double derivative of Langmuir probe I-V characteristics, [15] different important features of EEDF in a dusty plasma are presented.…”

Section: Introductionmentioning

confidence: 99%

“…The maximum pole field strength of each magnet (1.8 cm in thickness, 1.0 cm in breadth) is 0.07 T. The details of the filter configuration (field mapping, etc.) have already been reported by Bailung et al [29] power amplifier wide band oscillator dust dispersing set up The chamber is evacuated down to 2.0×10 −4 Pa using an oil diffusion pump backed by a rotary pump. The experimental observations are recorded at different working pressures (5.3×10 −2 Pa to 1.2×10 −1 Pa)) by injecting argon gas at a desired partial pressure under continuous pumping.…”

Section: Introductionmentioning

confidence: 99%

“…The high energetic electrons in the source plasma are then captured or reflected by the magnetic field lines and only low energy electrons are allowed to pass through the magnetic filter towards target section. [29] However, the target section is also equipped with discharge generating system, so plasma is produced in the target section also whenever necessary to obtain higher electron temperature and density there.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of electron energy distribution function in a magnetically filtered complex plasma

Deka¹,

Bailung²,

Adhikary³

2013

Chinese Phys. B

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The electron energy distribution function (EEDF) for a magnetically filtered dusty plasma is studied in a dusty double plasma device where the electron energy can be varied from 0.15 eV to ∼ 2.8 eV and plasma density from 106 cm−3 to 109 cm−3. The characteristics of EEDF for these ranges of plasma parameters are investigated in a pristine plasma as well as in a dusty plasma. The results show that in the presence of dust, there is a drastic modification in EEDF patterns in a plasma with higher electron temperature and density than those in a low temperature and low density plasma produced by the magnetic filter.

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Section: Probe Bias Voltagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of electron energy distribution function in a magnetically filtered complex plasma

Deka¹,

Bailung²,

Adhikary³

2013

Chinese Phys. B

Self Cite

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Ion and electron sheath characteristics in a low density and low temperature plasma

Borgohain

Bailung

2017

Physics of Plasmas

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Ion and electron sheath characteristics in a low electron temperature (Te ∼ 0.25–0.40 eV) and density (ne ∼ 106–107 cm−3) plasma are described. The plasma is produced in the experimental volume through diffusion from a hot cathode discharge plasma source by using a magnetic filter. The electron energy distribution function in the experimental plasma volume is measured to be a narrow Maxwellian distribution indicating the absence of primary and energetic electrons which are decoupled in the source side by the cusp magnetic field near the filter. An emissive probe is used to measure the sheath potential profiles in front of a metal plate biased negative and positive with respect to the plasma potential. For a positive plate bias, the electron density decreases considerably and the electron sheath expands with a longer presheath region compared to the ion sheath. The sheath potential structures are found to follow the Debye sheath model.

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Effect of non-thermality of electron and negative ion on the polarity of shock waves in a relativistic plasma

Dev

Deka

2018

Physics of Plasmas

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Considering the effect of non-thermality of electrons and negative ions, the evolution of shock waves and their characteristics in a relativistic plasma is investigated by deriving a three-dimensional Burgers' (3D-Burgers') equation. Based on the stationary solution of the 3D-Burgers' equation, the nature of propagation of shock waves for different suitable physically admissible ranges of plasma parameters, is carried out. Both compressive and rarefactive shock waves are found to propagate in such plasma under different combinations of non-thermal plasma parameters. The critical values of non-thermal electron and negative ion parameters, normalized electron, and negative ion density under which the non-linear co-efficient vanishes is sought. The nature of propagation of shock waves, below, above, and at the critical parameters is carried out. The non-thermal population of negative ions and electrons as well as normalized electron and negative ion density plays a pivotal role in controlling the polarity of the shock wave propagation. Compressive and rarefactive shock is found to propagate simultaneously with the non-thermal population of negative ions for different chosen values of normalized negative ion density at the critical value of normalized electron density.

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Charging of micrometre-sized dust grains in a low temperature and low density plasma produced using a magnetic filter

Cited by 6 publications

References 22 publications

Analysis of electron energy distribution function in a magnetically filtered complex plasma

Analysis of electron energy distribution function in a magnetically filtered complex plasma

Ion and electron sheath characteristics in a low density and low temperature plasma

Effect of non-thermality of electron and negative ion on the polarity of shock waves in a relativistic plasma

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