Charge-state dynamics of heavy-ion beams penetrating a hydrogen plasma
| Autor: | Inga Yu. Tolstikhina, Stepan N Andreev, V.P. Shevelko |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Nuclear and High Energy Physics Hydrogen chemistry.chemical_element Charge (physics) Rate equation Plasma 01 natural sciences 010305 fluids & plasmas Ion Distribution function chemistry Physics::Plasma Physics Ionization 0103 physical sciences Atomic physics 010306 general physics Instrumentation Recombination |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 502:37-45 |
| ISSN: | 0168-583X |
| Popis: | The dynamics of charge-state fractions of Au- and U-ion beams, penetrating hydrogen plasmas, is investigated for 1.4 and 3.6 MeV/u ion energies and plasma electron temperatures T e = (0.6 − 3.0) eV and densities N e =(1016 − 1020) cm−3. Calculations of the fractions as a function of the plasma thickness are performed by solving the balance rate equations with calculated ionization and recombination rates including those for dielectronic recombination (DR). The DR rates are calculated by the recently created computer code DRIMP using the fully relativistic multi-configuration approach and the so-called shifted Maxwellian velocity distribution function. Calculated by this method DR rates of Au- and U-ion beams passing through a hydrogen plasma are presented for the first time. Using the results obtained, the temperatures T e and densities N e are found at which the equilibrium mean charges q of Au- and U-ion beams are maximal for hydrogen-plasma length L ≤ 100 cm. Dependencies of the plasma equilibrium thicknesses X e q on the initial charge q 0 of incident ions are investigated, and it is found that X e q values are minimal at q 0 ≈ q . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect