Two-Dimensional Thomson Scattering in Laser-Produced Plasmas
We present two-dimensional (2D) optical Thomson scattering measurements of electron density and temperature in laser-produced plasmas. The novel instrument directly measures <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantic...
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MDPI AG
2023-09-01
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| Online Access: | https://www.mdpi.com/2410-390X/7/3/25 |
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| author | Haiping Zhang Jessica J. Pilgram Carmen G. Constantin Lucas Rovige Peter V. Heuer Sofiya Ghazaryan Marietta Kaloyan Robert S. Dorst Derek B. Schaeffer Christoph Niemann |
| author_facet | Haiping Zhang Jessica J. Pilgram Carmen G. Constantin Lucas Rovige Peter V. Heuer Sofiya Ghazaryan Marietta Kaloyan Robert S. Dorst Derek B. Schaeffer Christoph Niemann |
| author_sort | Haiping Zhang |
| collection | DOAJ |
| description | We present two-dimensional (2D) optical Thomson scattering measurements of electron density and temperature in laser-produced plasmas. The novel instrument directly measures <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>n</mi><mi>e</mi></msub><mrow><mo>(</mo><mi>x</mi><mo>,</mo><mi>y</mi><mo>)</mo></mrow></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>T</mi><mi>e</mi></msub><mrow><mo>(</mo><mi>x</mi><mo>,</mo><mi>y</mi><mo>)</mo></mrow></mrow></semantics></math></inline-formula> in two dimensions over large spatial regions (cm<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>2</mn></msup></semantics></math></inline-formula>) with sub-mm spatial resolution, by automatically translating the scattering volume while the plasma is produced repeatedly by irradiating a solid target with a high-repetition-rate laser beam (10 J, ∼10<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>12</mn></msup></semantics></math></inline-formula> W/cm<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>2</mn></msup></semantics></math></inline-formula>, 1 Hz). In this paper, we describe the design and motorized auto-alignment of the instrument and the computerized algorithm that autonomously fits the spectral distribution function to the tens-of-thousands of measured scattering spectra, and captures the transition from the collective to the non-collective regime with distance from the target. As an example, we present the first 2D scattering measurements in laser-driven shock waves in ambient nitrogen gas at a pressure of 0.13 mbar. |
| first_indexed | 2024-03-10T22:38:04Z |
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| id | doaj.art-4ac137eef963440db1c67eb25822cd46 |
| institution | Directory Open Access Journal |
| issn | 2410-390X |
| language | English |
| last_indexed | 2024-03-10T22:38:04Z |
| publishDate | 2023-09-01 |
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| spelling | doaj.art-4ac137eef963440db1c67eb25822cd462023-11-19T11:15:51ZengMDPI AGInstruments2410-390X2023-09-01732510.3390/instruments7030025Two-Dimensional Thomson Scattering in Laser-Produced PlasmasHaiping Zhang0Jessica J. Pilgram1Carmen G. Constantin2Lucas Rovige3Peter V. Heuer4Sofiya Ghazaryan5Marietta Kaloyan6Robert S. Dorst7Derek B. Schaeffer8Christoph Niemann9Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USADepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USADepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USADepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USALaboratory for Laser Energetics, University of Rochester, Rochester, NY 14623, USADepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USADepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USADepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USADepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USADepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAWe present two-dimensional (2D) optical Thomson scattering measurements of electron density and temperature in laser-produced plasmas. The novel instrument directly measures <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>n</mi><mi>e</mi></msub><mrow><mo>(</mo><mi>x</mi><mo>,</mo><mi>y</mi><mo>)</mo></mrow></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>T</mi><mi>e</mi></msub><mrow><mo>(</mo><mi>x</mi><mo>,</mo><mi>y</mi><mo>)</mo></mrow></mrow></semantics></math></inline-formula> in two dimensions over large spatial regions (cm<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>2</mn></msup></semantics></math></inline-formula>) with sub-mm spatial resolution, by automatically translating the scattering volume while the plasma is produced repeatedly by irradiating a solid target with a high-repetition-rate laser beam (10 J, ∼10<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>12</mn></msup></semantics></math></inline-formula> W/cm<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>2</mn></msup></semantics></math></inline-formula>, 1 Hz). In this paper, we describe the design and motorized auto-alignment of the instrument and the computerized algorithm that autonomously fits the spectral distribution function to the tens-of-thousands of measured scattering spectra, and captures the transition from the collective to the non-collective regime with distance from the target. As an example, we present the first 2D scattering measurements in laser-driven shock waves in ambient nitrogen gas at a pressure of 0.13 mbar.https://www.mdpi.com/2410-390X/7/3/25Thomson scatteringlaser diagnosticsplasma physicsRaman scatteringtriple-grating spectrometer |
| spellingShingle | Haiping Zhang Jessica J. Pilgram Carmen G. Constantin Lucas Rovige Peter V. Heuer Sofiya Ghazaryan Marietta Kaloyan Robert S. Dorst Derek B. Schaeffer Christoph Niemann Two-Dimensional Thomson Scattering in Laser-Produced Plasmas Instruments Thomson scattering laser diagnostics plasma physics Raman scattering triple-grating spectrometer |
| title | Two-Dimensional Thomson Scattering in Laser-Produced Plasmas |
| title_full | Two-Dimensional Thomson Scattering in Laser-Produced Plasmas |
| title_fullStr | Two-Dimensional Thomson Scattering in Laser-Produced Plasmas |
| title_full_unstemmed | Two-Dimensional Thomson Scattering in Laser-Produced Plasmas |
| title_short | Two-Dimensional Thomson Scattering in Laser-Produced Plasmas |
| title_sort | two dimensional thomson scattering in laser produced plasmas |
| topic | Thomson scattering laser diagnostics plasma physics Raman scattering triple-grating spectrometer |
| url | https://www.mdpi.com/2410-390X/7/3/25 |
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