Stopping power of ions in a strongly magnetized plasma

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871779· OSTI ID:278978

Boine-Frankenheim, O ^[1]; DAvanzo, J ^[2]

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1. Theoretical Quantum Electronics (TQE), TH Darmstadt, Hochschulstr. 4a, 64289 Darmstadt (Germany)
2. Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, via Bassini 15, 20133 Milano (Italy)

The energy loss of heavy ions in a strongly magnetized plasma is studied by means of Vlasov and Particle-in-Cell (PIC) simulations. The topic is of importance for many practical applications, as for example in the electron cooling of heavy ion beams. Measurements of the longitudinal cooling force show strong deviations from the well known linear theories. Moreover, the possibility of heavy ions to reach high charge states {ital Z}{sub {ital p}} increases the interest in understanding the plasma regime with coupling parameter {ital Z}{sub {ital p}}/{ital N}{sub {ital D}}{approx_gt}1 ({ital N}{sub {ital D}} is the number of electrons in a Debye sphere), when nonlinear phenomena are important. In this regime a linearization of the drift kinetic Vlasov{endash}Poisson system is not possible, so that a fully nonlinear numerical approach is unavoidable. Comparisons between the two numerical schemes are made for the stopping power and the potential created in the plasma by a moving ion, together with the dielectric theory of ion stopping. Our results show strong deviations from the dielectric theory, and our investigations show the importance of the role played by the electrons trapped in the potential troughs excited by the ion in the stopping process. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 278978
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
DIELECTRIC PROPERTIES
ENERGY LOSSES
HEAVY IONS
ION BEAMS
PLASMA SIMULATION
STOPPING POWER
TRAPPED ELECTRONS