Energy Loss of a Test Charge in Collisional Dusty Plasmas

2000 ◽  
Vol 61 (5) ◽  
pp. 628-634 ◽  
Author(s):  
M H Nasim ◽  
Arshad M Mirza ◽  
G Murtaza ◽  
P K Shukla
Keyword(s):  
Energy Loss ◽  
Dusty Plasmas ◽  
Test Charge

Energy Loss of a Test Charge in Dusty Plasmas: Collective and Individual Particle Contributions

1999 ◽  
Vol 59 (5) ◽  
pp. 379-388 ◽  
Author(s):  
M H Nasim ◽  
Arshad M Mirza ◽  
G Murtaza ◽  
P K Shukla
Keyword(s):  
Energy Loss ◽  
Dusty Plasmas ◽  
Individual Particle ◽  
Test Charge

Energy loss of a test charge in partially ionized dusty plasmas

2000 ◽  
Vol 7 (2) ◽  
pp. 762-765 ◽  
Author(s):  
M. H. Nasim ◽  
M. S. Qaisar ◽  
Arshad M. Mirza ◽  
G. Murtaza ◽  
P. K. Shukla
Keyword(s):  
Energy Loss ◽  
Dusty Plasmas ◽  
Test Charge ◽  
Partially Ionized

scholarly journals Plasma Diagnostic Methods: Test Charge Response in Lorentzian Dusty Plasmas

2020 ◽  
Author(s):  
Shahid Ali ◽  
Yas Al-Hadeethi
Keyword(s):  
Dusty Plasmas ◽  
Diagnostic Methods ◽  
Charged Dust ◽  
Dust Grains ◽  
Plasma Diagnostic ◽  
Acoustic Oscillations ◽  
Plasma Parameters ◽  
Charge Potential ◽  
Test Charge ◽  
Electrons And Ions

Different plasma diagnostic methods are briefly discussed, and the framework of a test charge technique is effectively used as diagnostic tool for investigating interaction potentials in Lorentzian plasma, whose constituents are the superthermal electrons and ions with negatively charged dust grains. Applying the space-time Fourier transformations to the linearized coupled Vlasov-Poisson equations, a test charge potential is derived with a modified response function due to energetic ions and electrons. For a test charge moving much slower than the dust-thermal speed, there appears a short-range Debye-Hückel (DH) potential decaying exponentially with distance and a long-range far-field (FF) potential as the inverse cube of the distance from test charge. The FF potentials exhibit more localized shielding curves for low-Kappas, and smaller effective shielding length is observed in dusty plasma compared to electron-ion plasma. However, a wakefield (WF) potential is formed behind the test charge when it resonates with dust-acoustic oscillations, whereas a fast moving test charge leads to the Coulomb potential having no shielding around. It is revealed that superthermality and plasma parameters significantly alter the DH, FF, and WF potentials in space plasmas of Saturn’s E-ring, where power-law distributions can be used for energetic electrons and ions in contrast to Maxwellian dust grains.

Effect of turbulence on the rate of energy loss by a test charge moving in a plasma

1977 ◽  
Vol 63 (2) ◽  
pp. 112-114
Author(s):  
K.C. Swami ◽  
S.R. Sharma
Keyword(s):  
Energy Loss ◽  
Test Charge

Total Energy Loss of a Test Charge in a Collisional Magnetoplasma

1971 ◽  
Vol 4 (6) ◽  
pp. 281-289 ◽  
Author(s):  
P K Shukla ◽  
R N Singh
Keyword(s):  
Energy Loss ◽  
Total Energy ◽  
Test Charge

The potential around a test charge in magnetized dusty plasmas

1996 ◽  
Vol 3 (10) ◽  
pp. 3858-3860 ◽  
Author(s):  
P. K. Shukla ◽  
M. Salimullah
Keyword(s):  
Dusty Plasmas ◽  
Test Charge

Energy loss of charged projectiles in dusty plasmas

1998 ◽  
Vol 5 (10) ◽  
pp. 3581-3587 ◽  
Author(s):  
M. H. Nasim ◽  
Arshad M. Mirza ◽  
M. S. Qaisar ◽  
G. Murtaza ◽  
P. K. Shukla
Keyword(s):  
Energy Loss ◽  
Dusty Plasmas

Shielding of a slowly moving test charge in dusty plasmas

1994 ◽  
Vol 1 (5) ◽  
pp. 1362-1363 ◽  
Author(s):  
P. K. Shukla
Keyword(s):  
Dusty Plasmas ◽  
Test Charge

Inelastic Electron-Matter Interactions

1978 ◽  
Vol 36 (3) ◽  
pp. 259-267
Author(s):  
J. Silcox
Keyword(s):  
Electron Microscope ◽  
Energy Loss ◽  
Chemical Structure ◽  
Inelastic Electron ◽  
Primary Concern ◽  
Unique Probe ◽  
Introductory Paper ◽  
Elastic Processes ◽  
Experimental Level ◽  
Inelastic Processes

In this introductory paper, my primary concern will be in identifying and outlining the various types of inelastic processes resulting from the interaction of electrons with matter. Elastic processes are understood reasonably well at the present experimental level and can be regarded as giving information on spatial arrangements. We need not consider them here. Inelastic processes do contain information of considerable value which reflect the electronic and chemical structure of the sample. In combination with the spatial resolution of the electron microscope, a unique probe of materials is finally emerging (Hillier 1943, Watanabe 1955, Castaing and Henri 1962, Crewe 1966, Wittry, Ferrier and Cosslett 1969, Isaacson and Johnson 1975, Egerton, Rossouw and Whelan 1976, Kokubo and Iwatsuki 1976, Colliex, Cosslett, Leapman and Trebbia 1977). We first review some scattering terminology by way of background and to identify some of the more interesting and significant features of energy loss electrons and then go on to discuss examples of studies of the type of phenomena encountered. Finally we will comment on some of the experimental factors encountered.

Data Acquisition and Handling Unit for a Quantitative Use of Electron Energy Loss Spectroscopy

1977 ◽  
Vol 35 ◽  
pp. 232-233 ◽  
Author(s):  
P. Trebbia ◽  
P. Ballongue ◽  
C. Colliex
Keyword(s):  
Electron Microscope ◽  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Single Channel ◽  
Detection System ◽  
Surface Barrier ◽  
Solid State Detector ◽  
Electrostatic Mirror ◽  
Electron Energy Loss

An effective use of electron energy loss spectroscopy for chemical characterization of selected areas in the electron microscope can only be achieved with the development of quantitative measurements capabilities.The experimental assembly, which is sketched in Fig.l, has therefore been carried out. It comprises four main elements.The analytical transmission electron microscope is a conventional microscope fitted with a Castaing and Henry dispersive unit (magnetic prism and electrostatic mirror). Recent modifications include the improvement of the vacuum in the specimen chamber (below 10-6 torr) and the adaptation of a new electrostatic mirror.The detection system, similar to the one described by Hermann et al (1), is located in a separate chamber below the fluorescent screen which visualizes the energy loss spectrum. Variable apertures select the electrons, which have lost an energy AE within an energy window smaller than 1 eV, in front of a surface barrier solid state detector RTC BPY 52 100 S.Q. The saw tooth signal delivered by a charge sensitive preamplifier (decay time of 5.10-5 S) is amplified, shaped into a gaussian profile through an active filter and counted by a single channel analyser.

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