Temperature equilibration due to charge state fluctuations in dense plasmas
The charge states of ions in dense plasmas fluctuate due to collisional ionization and recombination. Here, we show how, by modifying the ion interaction potential, these fluctuations can mediate energy exchange between the plasma electrons and ions. Moreover, we develop a theory for this novel elec...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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American Physical Society
2021
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| _version_ | 1797086950308446208 |
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| author | Baggott, RA Rose, SJ Mangles, SPD |
| author_facet | Baggott, RA Rose, SJ Mangles, SPD |
| author_sort | Baggott, RA |
| collection | OXFORD |
| description | The charge states of ions in dense plasmas fluctuate due to collisional ionization and recombination. Here, we show how, by modifying the ion interaction potential, these fluctuations can mediate energy exchange between the plasma electrons and ions. Moreover, we develop a theory for this novel electron-ion energy transfer mechanism. Calculations using a random walk approach for the fluctuations suggest that the energy exchange rate from charge state fluctuations could be comparable to direct electron-ion collisions. This mechanism is, however, predicted to exhibit a complex dependence on the temperature and ionization state of the plasma, which could contribute to our understanding of significant variation in experimental measurements of equilibration times. |
| first_indexed | 2024-03-07T02:29:10Z |
| format | Journal article |
| id | oxford-uuid:a6a774ee-97c2-4ac0-8c0c-5651b4691b85 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:29:10Z |
| publishDate | 2021 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:a6a774ee-97c2-4ac0-8c0c-5651b4691b852022-03-27T02:48:46ZTemperature equilibration due to charge state fluctuations in dense plasmasJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a6a774ee-97c2-4ac0-8c0c-5651b4691b85EnglishSymplectic ElementsAmerican Physical Society2021Baggott, RARose, SJMangles, SPDThe charge states of ions in dense plasmas fluctuate due to collisional ionization and recombination. Here, we show how, by modifying the ion interaction potential, these fluctuations can mediate energy exchange between the plasma electrons and ions. Moreover, we develop a theory for this novel electron-ion energy transfer mechanism. Calculations using a random walk approach for the fluctuations suggest that the energy exchange rate from charge state fluctuations could be comparable to direct electron-ion collisions. This mechanism is, however, predicted to exhibit a complex dependence on the temperature and ionization state of the plasma, which could contribute to our understanding of significant variation in experimental measurements of equilibration times. |
| spellingShingle | Baggott, RA Rose, SJ Mangles, SPD Temperature equilibration due to charge state fluctuations in dense plasmas |
| title | Temperature equilibration due to charge state fluctuations in dense plasmas |
| title_full | Temperature equilibration due to charge state fluctuations in dense plasmas |
| title_fullStr | Temperature equilibration due to charge state fluctuations in dense plasmas |
| title_full_unstemmed | Temperature equilibration due to charge state fluctuations in dense plasmas |
| title_short | Temperature equilibration due to charge state fluctuations in dense plasmas |
| title_sort | temperature equilibration due to charge state fluctuations in dense plasmas |
| work_keys_str_mv | AT baggottra temperatureequilibrationduetochargestatefluctuationsindenseplasmas AT rosesj temperatureequilibrationduetochargestatefluctuationsindenseplasmas AT manglesspd temperatureequilibrationduetochargestatefluctuationsindenseplasmas |