Stopping of charged particles in a magnetized classical plasma

Abstract

The analytical and numerical investigations of the energy loss rate of the test particle in a magnetized electron plasma are developed on the basis of the Vlasov-Poisson equations, and the main results are presented. The Larmor rotation of a test particle in a magnetic field is taken into account. The analysis is based on the assumption that the energy variation of the test particle is much less than its kinetic energy. The obtained general expression for stopping power is analyzed for three cases: (i) the particle moves through a collisionless plasma in a strong homogeneous magnetic field; (ii) the fast particle moves through a magnetized collisionless plasma along the magnetic field; and (iii) the particle moves through a magnetized collisional plasma across a magnetic field. Calculations are carried out for the arbitrary test particle velocities in the first case, and for fast particles in the second and third cases. It is shown that the rate at which a fast test particle loses energy while moving across a magnetic field may be much higher than the loss in the case of motion through plasma without magnetic field.

Trends in heavy ion interaction with plasma

“…The interaction process between the ions and plasmas is usually characterized with the ion-plasma coupling strength Z = (Z p /N D ), where Z p is the charge of the ion and N D is the number of electrons in a Debye sphere. For weak ion-plasma coupling Z ≪ 1, the well-known linearized theories, such as the dielectric theory and binary collision theory (Peter & Meyer-ter-Vehn, 1991a;Nersisyan, 1998;Nersisyan & Fig. 6.…”

Influences of finite Larmor radius on wake effects and stopping power for proton moving in magnetized two-component plasma

“…In Ref. [18], the energy loss rate for arbitrary test particle velocities in the limit of sufficiently strong magnetic field was calculated, which was much higher than that without magnetic field. Besides, it is also found that the magnetic field reduces the stopping power at high particle velocities, while enhances the stopping power at low particle velocities [19].…”

“…However, to our best knowledge, only a few theoretical studies on energy losses consider the Larmor rotation of the projectile, and pay special attention to the case of extreme magnetization, as well as to the incidence velocity paralleled the magnetic field [18,21]. In Ref.…”

“…Since magnetic fields are experimentally available in the MCF and electron cooling processes, many theoretical calculations of the stopping power in a magnetized plasma have been presented [12,[15][16][17][18][19][20][21][22][23][24]. When a charged particle penetrates into a magnetic field, it suffers the Lorentz force only in the direction across the magnetic field.…”

Stopping of Heavy Ions in Magnetized Strongly Coupled Plasmas: High‐Velocity Limit

“…It has been shown that the stopping power can exhibit an oscillatory dependence on the magnetic field and that it is much greater than in the case without magnetic field. More attention has been paid on the stopping power in a strongly magnetized plasma for ions which move along the magnetic field [10]- [14]. Both uncorrelated [10]- [13] and correlated [14] situations have been discussed.…”