Theory of Thomson scattering in inhomogeneous media
Thomson scattering of laser light is one of the most fundamental diagnostics of plasma density, temperature and magnetic fields. It relies on the assumption that the properties in the probed volume are homogeneous and constant during the probing time. On the other hand, laboratory plasmas are seldom...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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Nature Publishing Group
2016
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| _version_ | 1797084202713219072 |
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| author | Kozlowski, P Crowley, B Gericke, DO Regan, S Gregori, G |
| author_facet | Kozlowski, P Crowley, B Gericke, DO Regan, S Gregori, G |
| author_sort | Kozlowski, P |
| collection | OXFORD |
| description | Thomson scattering of laser light is one of the most fundamental diagnostics of plasma density, temperature and magnetic fields. It relies on the assumption that the properties in the probed volume are homogeneous and constant during the probing time. On the other hand, laboratory plasmas are seldom uniform and homogeneous on the temporal and spatial dimensions over which data is collected. This is particularly true for laser-produced high-energy-density matter, which often exhibits steep gradients in temperature, density and pressure, on a scale determined by the laser focus. Here, we discuss the modification of the cross section for Thomson scattering in fully-ionized media exhibiting steep spatial inhomogeneities and/or fast temporal fluctuations. We show that the predicted Thomson scattering spectra are greatly altered compared to the uniform case, and may lead to violations of detailed balance. Therefore, careful interpretation of the spectra is necessary for spatially or temporally inhomogeneous systems. |
| first_indexed | 2024-03-07T01:52:06Z |
| format | Journal article |
| id | oxford-uuid:9a785be2-cb7a-4474-aa39-d25e5e951b74 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:52:06Z |
| publishDate | 2016 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | oxford-uuid:9a785be2-cb7a-4474-aa39-d25e5e951b742022-03-27T00:21:30ZTheory of Thomson scattering in inhomogeneous mediaJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:9a785be2-cb7a-4474-aa39-d25e5e951b74EnglishSymplectic Elements at OxfordNature Publishing Group2016Kozlowski, PCrowley, BGericke, DORegan, SGregori, GThomson scattering of laser light is one of the most fundamental diagnostics of plasma density, temperature and magnetic fields. It relies on the assumption that the properties in the probed volume are homogeneous and constant during the probing time. On the other hand, laboratory plasmas are seldom uniform and homogeneous on the temporal and spatial dimensions over which data is collected. This is particularly true for laser-produced high-energy-density matter, which often exhibits steep gradients in temperature, density and pressure, on a scale determined by the laser focus. Here, we discuss the modification of the cross section for Thomson scattering in fully-ionized media exhibiting steep spatial inhomogeneities and/or fast temporal fluctuations. We show that the predicted Thomson scattering spectra are greatly altered compared to the uniform case, and may lead to violations of detailed balance. Therefore, careful interpretation of the spectra is necessary for spatially or temporally inhomogeneous systems. |
| spellingShingle | Kozlowski, P Crowley, B Gericke, DO Regan, S Gregori, G Theory of Thomson scattering in inhomogeneous media |
| title | Theory of Thomson scattering in inhomogeneous media |
| title_full | Theory of Thomson scattering in inhomogeneous media |
| title_fullStr | Theory of Thomson scattering in inhomogeneous media |
| title_full_unstemmed | Theory of Thomson scattering in inhomogeneous media |
| title_short | Theory of Thomson scattering in inhomogeneous media |
| title_sort | theory of thomson scattering in inhomogeneous media |
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