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

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 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

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

Energy loss of nuclear fragments in partially ionized materials of high atomic number

1991 ◽  
Vol 44 (1) ◽  
pp. 392-395 ◽  
Author(s):  
R. A. Lewis ◽  
G. A. Smith ◽  
W. S. Toothacker
Keyword(s):  
Energy Loss ◽  
Atomic Number ◽  
High Atomic Number ◽  
Partially Ionized

scholarly journals Measurement of stopping power of 240 MeV argon ions in partially ionized helium discharge plasma

2000 ◽  
Vol 18 (4) ◽  
pp. 647-653 ◽  
Author(s):  
M. OGAWA ◽  
U. NEUNER ◽  
H. KOBAYASHI ◽  
Y. NAKAJIMA ◽  
K. NISHIGORI ◽  
...  
Keyword(s):  
Energy Loss ◽  
Electron Density ◽  
Target Thickness ◽  
Stopping Power ◽  
Helium Plasma ◽  
Discharge Ignition ◽  
The Mean ◽  
Argon Ions ◽  
Partially Ionized ◽  
Mean Charge

An energy loss of 240 MeV argon ions in a Z-pinch helium plasma has been for the first time observed throughout the entire pinching process. Standard Stark broadening analysis gives an electron density ranging from 4 to 6 × 1017 cm−3 during the pinch. To deduce stopping power from the energy loss, the target thickness of the helium plasma has been evaluated assuming the mean charge of helium based on thermal equilibrium. The observed electron density and the mean charge of helium give a target thickness of 30 ± 3 μg cm−2 from 1 μs to 1.8 μs after the discharge ignition. The measured stopping power exceeds a tabulated value for cold helium gas by a factor of 2 to 3 around the time of the first pinch. The experimental stopping power is compared with theoretical values calculated using an equation of stopping power for a partially ionized plasma.

scholarly journals Energy loss and effective charge of low-energy oxygen ions in partially ionized plasma

2000 ◽  
Vol 18 (4) ◽  
pp. 639-646
Author(s):  
K. NISHIGORI ◽  
U. NEUNER ◽  
M. TAKIZAWA ◽  
M. KOJIMA ◽  
T. SAGAMI ◽  
...  
Keyword(s):  
Energy Loss ◽  
Charge Distribution ◽  
Effective Charge ◽  
Low Energy ◽  
Stopping Power ◽  
Oxygen Ions ◽  
Power Equation ◽  
Slow Ions ◽  
Partially Ionized ◽  
Peak Value

This article reports on the interaction between slow ions and a partially ionized plasma. Temporal evolutions of energy loss and charge distribution of 2.4 MeV oxygen beams in the laser-induced polyethylene plasma were measured. The charge distribution showed strong stripping ability in the early phase of the plasma. Stopping power deduced from the experimental energy loss was 1.9 times larger than that for the solid. The effective charge of the projectile ion was estimated from the yields of 4+ and 6+ states. The peak value of the effective charge was 1.4 times larger than that of the solid. The stopping power equation given by Sigmund was extended for the partially ionized plasma and it could reproduce the measured energy loss.

Sign in / Sign up

Export Citation Format

Share Document