Screening and collective effects on resonant charge-exchange processes in nonideal plasmas

Mi-Young Song, J.K.; Young-Dae Jung
December 2003
Applied Physics Letters;12/15/2003, Vol. 83 Issue 24, p4972
Academic Journal
The resonant charge-exchange process by ion–ion collisions is investigated in nonideal plasmas. The interaction Hamiltonian in nonideal plasmas is given by an pseudopotential model that takes into account the plasma screening effect as well as the nonideal collective effect. Screened atomic states of the target and projectile ions in nonideal plasmas are obtained by the variational principle and perturbational analysis. The semiclassical straight-line trajectory method is used to describe the behavior of the projectile ion. It is found that the resonant charge-exchange probability in nonideal plasmas described by the pseudopotential is smaller than that in ideal plasmas described by the Debye–Hückel potential. The maximum position of the resonant charge-exchange probability, i.e., the position which takes place the resonant change-exchange process, is found to recede from the target ion with an increase of the nonideal effect. © 2003 American Institute of Physics.


Related Articles

  • Rigid rotor equilibria of multifluid, neutral plasma columns in crossed electric and magnetic fields. Prasad, Rahul R.; Krishnan, Mahadevan // Physics of Fluids (00319171);Nov87, Vol. 30 Issue 11, p3496 

    A multifluid model is considered for rigid rotor equilibrium in an axisymmetric, semi-infinite, isothermal, fully magnetized plasma column with negligible radial diffusion. The plasma potential profile is self-consistently calculated using a perturbation expansion and is found to be parabolic....

  • Kinetic Theory of a Gas-Discharge Positive Column and Wall Sheath. Dvinin, S. A.; Dovzhenko, V. A.; Kuzovnikov, A. A. // Plasma Physics Reports;Feb2000, Vol. 26 Issue 2, p164 

    The positive column and wall sheath in a gas discharge are studied with allowance for ion collisions in a plasma and ion reflection from a solid surface under conditions of incomplete ion neutralization. The kinetic equation for ions in a positive column is reduced to a Fredholm equation of the...

  • One-dimensional full wave treatment of mode conversion process at the ion-ion hybrid resonance... Monakhov, I.; Becoulet, A. // Physics of Plasmas;Mar1999, Vol. 6 Issue 3, p885 

    Studies one-dimensional full wave treatment of mode conversion process at the ion-ion hybrid resonance in a bounded tokamak plasma. Picture of mode conversion process; Mode conversion problem.

  • Antiscreening versus screening excitations for low-energy ion-ion collisions in dense plasmas... Jung-Sik Yoon; Young-Dae Jung // Physics of Plasmas;Aug99, Vol. 6 Issue 8, p3391 

    Examines plasma screening effects on antiscreening and screening channels for excitation of a one-electron target ion by a one-electron projection ion in dense plasmas. Ion-ion interaction potential given by the nonspherical Debye-Huckel model; Maximum position of the transition probability...

  • Effect of neutral particles on the energy confinement of spheromaks. Mayo, R. M.; Choi, C. K.; Levinton, F. M.; Janos, A. C.; Yamada, M. // Physics of Fluids B: Plasma Physics;Jan90, Vol. 2 Issue 1, p115 

    Neutral density profiles are calculated for plasma and edge conditions consistent with those of the S-1 spheromak [Plasma Physics and Controlled Nuclear Fusion Research, 1984 (IAEA, Vienna, 1985), Vol. 2, p. 535]. Multiple generation charge exchange is the dominant transport mechanism for edge...

  • Neutral particle energy analysis and charge exchange power loss in edge-dominated spheromaks. Mayo, R. M.; Kirschenbaum, L. S. // Physics of Fluids B: Plasma Physics;Aug91, Vol. 3 Issue 8, p2096 

    Neutral particle density profiles have previously been calculated for spheromak plasmas [Phys. Fluids B 2 (1990) 115]. Here, the formalism is extended to calculate the onedimensional (l-D) profile of the egressing neutral energy flux to correctly treat profile and attenuation effects. If is...

  • Brillouin enhanced four-wave mixing and phase conjugation in weakly collisional plasmas. Shukla, P.K. // Physics of Plasmas;Feb2001, Vol. 5 Issue 2, p550 

    Examines Brillouin enhanced four-wave mixing and phase conjugation of electromagnetic waves in weakly collisional fully ionized plasma. Dominance of nonlinearity associated with the nonlocal electron heat transport; Production of low-frequency nonlinear force; Effect of nonlocal heat transport...

  • New understanding of poloidal rotation measurements in a Tokamak plasma. Bell, R. E.; Synakowski, E. J. // AIP Conference Proceedings;2000, Vol. 547 Issue 1, p39 

    Significant atomic physics corrections to the measured poloidal velocity using charge exchange spectroscopy have been neglected when interpreting impurity poloidal velocity. In the presence of a magnetic field, the gyro motion of the impurity ion along with the finite lifetime of the observed...

  • Interplay of kinetic and transport effects on RF current drive. Giruzzi, G.; Dumont, R. // AIP Conference Proceedings;2001, Vol. 595 Issue 1, p394 

    A numerical model for predictive simulations of radiofrequency current drive in magnetically confined plasmas is developed. It includes the minimum requirements for a selfconsistent description of such regimes, i.e., a 3-dimensional kinetic equation for the electron distribution function,...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics