Effects of Coulomb coupling on stopping power and a link to macroscopic transport

The energy of moving ions in solid is dependent on the electronic density as well as the atomic structural properties of the target material. These factors contribute to the observable effects in polycrystalline material using the scanning ion microscope. Here we outline a method to investigate the dependence of low velocity proton stopping on interatomic distances and orientations.The interaction of charged particles with atoms in the frame work of the Fermi gas model was proposed by Lindhard. For a system of atoms, the electronic Lindhard stopping power can be generalized to the formwhere the stopping power function is defined as

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Stopping-power determination for compound by EELS

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100172474 ◽

1994 ◽

Vol 52 ◽

pp. 948-949 ◽

Cited By ~ 1

Author(s):

David C. Joy ◽

Suichu Luo ◽

John R. Dunlap ◽

Dick Williams ◽

Siqi Cao

Keyword(s):

Energy Loss ◽

Electron Energy ◽

Electron Energy Loss Spectroscopy ◽

Materials Science ◽

Average Energy ◽

Stopping Power ◽

Accurate Information ◽

Power Calculation ◽

Coulomb Collisions ◽

Electron Energy Loss

In Physics, Chemistry, Materials Science, Biology and Medicine, it is very important to have accurate information about the stopping power of various media for electrons, that is the average energy loss per unit pathlength due to inelastic Coulomb collisions with atomic electrons of the specimen along their trajectories. Techniques such as photoemission spectroscopy, Auger electron spectroscopy, and electron energy loss spectroscopy have been used in the measurements of electron-solid interaction. In this paper we present a comprehensive technique which combines experimental and theoretical work to determine the electron stopping power for various materials by electron energy loss spectroscopy (EELS ). As an example, we measured stopping power for Si, C, and their compound SiC. The method, results and discussion are described briefly as below.The stopping power calculation is based on the modified Bethe formula at low energy:where Neff and Ieff are the effective values of the mean ionization potential, and the number of electrons participating in the process respectively. Neff and Ieff can be obtained from the sum rule relations as we discussed before3 using the energy loss function Im(−1/ε).

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CURRENT STATUS OF CALCULATIONS AND MEASUREMENTS OF ION STOPPING POWER IN ICF PLASMAS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1983804 ◽

1983 ◽

Vol 44 (C8) ◽

pp. C8-39-C8-66 ◽

Cited By ~ 7

Author(s):

T. A. Mehlhorn ◽

J. M. Peek ◽

E. J. McGuire ◽

J. N. Olsen ◽

F. C. Young

Keyword(s):

Stopping Power ◽

Current Status

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FAST-ION STOPPING POWER IN HOT, DENSE, STRONGLY-COUPLED PLASMA

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1988713 ◽

1988 ◽

Vol 49 (C7) ◽

pp. C7-105-C7-122

Author(s):

B. J.B. CROWLEY

Keyword(s):

Stopping Power ◽

Strongly Coupled ◽

Strongly Coupled Plasma ◽

Fast Ion

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Effect of external magnetic field on lane formation in driven pair-ion plasmas

Journal of Plasma Physics ◽

10.1017/s0022377821000027 ◽

2021 ◽

Vol 87 (2) ◽

Author(s):

Swati Baruah ◽

U. Sarma ◽

R. Ganesh

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Field Strength ◽

Electric Field ◽

Electric Field Strength ◽

Coupling Parameter ◽

Critical Parameters ◽

Coulomb Coupling ◽

Lane Formation ◽

Parameter Values

Lane formation dynamics in externally driven pair-ion plasma (PIP) particles is studied in the presence of external magnetic field using Langevin dynamics (LD) simulation. The phase diagram obtained distinguishing the no-lane and lane states is systematically determined from a study of various Coulomb coupling parameter values. A peculiar lane formation-disintegration parameter space is identified; lane formation area extended to a wide range of Coulomb coupling parameter values is observed before disappearing to a mixed phase. The different phases are identified by calculating the order parameter. This and the critical parameters are calculated directly from LD simulation. The critical electric field strength value above which the lanes are formed distinctly is obtained, and it is observed that in the presence of the external magnetic field, the PIP system requires a higher value of the electric field strength to enter into the lane formation state than that in the absence of the magnetic field. We further find out the critical value of electric field frequency beyond which the system exhibits a transition back to the disordered state and this critical frequency is found as an increasing function of the electric field strength in the presence of an external magnetic field. The movement of the lanes is also observed in a direction perpendicular to that of the applied electric and magnetic field directions, which reveals the existence of the electric field drift in the system under study. We also use an oblique force field as the external driving force, both in the presence and absence of the external magnetic field. The application of this oblique force changes the orientation of the lane structures for different applied oblique angle values.

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