Comparison of excitation temperature of a laser-produced plasma by combining emission and absorption spectroscopy
Measurement of the temporal evolution of laser-produced plasma temperature is very important for many of its applications, and several plasma diagnostic tools are routinely used by researchers. However, it is very challenging to measure the properties of the plasma at the early and late times of its...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2024-02-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0190522 |
| _version_ | 1797278308671422464 |
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| author | M. P. Polek M. C. Phillips F. N. Beg S. S. Harilal |
| author_facet | M. P. Polek M. C. Phillips F. N. Beg S. S. Harilal |
| author_sort | M. P. Polek |
| collection | DOAJ |
| description | Measurement of the temporal evolution of laser-produced plasma temperature is very important for many of its applications, and several plasma diagnostic tools are routinely used by researchers. However, it is very challenging to measure the properties of the plasma at the early and late times of its evolution using a single diagnostic tool. In this study, we combined emission and laser absorption spectroscopy to compare the excitation temperatures of a laser-produced uranium plasma system. Several U I transitions in the near-infrared spectral range (775–800 nm) were considered, and the Boltzmann plot method was used to measure the excitation temperatures using both emission and absorption spectroscopy. Emission spectroscopy provided early-time temperature measurements of the plasma up to times 2–20 µs, while absorption spectroscopy provided temperature measurements at late times of plasma evolution (for times 5–80 µs). The emission and absorbance of U I transitions were found to follow the Boltzmann distribution, indicating the plasma is likely in the state of local thermodynamic equilibrium even at late times of its lifetime. The emission and absorption-based time-resolved excitation temperatures demonstrated good agreement at earlier times (≤15 µs) in the overlapped temporal region, while a deviation in the measured values was seen at times (≥15 µs), and potential reasons for such a disagreement are discussed. |
| first_indexed | 2024-03-07T16:01:25Z |
| format | Article |
| id | doaj.art-c02c4d4c70584d709ae4f75836e558d0 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-03-07T16:01:25Z |
| publishDate | 2024-02-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-c02c4d4c70584d709ae4f75836e558d02024-03-04T21:29:32ZengAIP Publishing LLCAIP Advances2158-32262024-02-01142025043025043-1010.1063/5.0190522Comparison of excitation temperature of a laser-produced plasma by combining emission and absorption spectroscopyM. P. Polek0M. C. Phillips1F. N. Beg2S. S. Harilal3Center for Energy Research, University of California San Diego, La Jolla, California 92093, USAJames C. Wyant College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USACenter for Energy Research, University of California San Diego, La Jolla, California 92093, USAPacific Northwest National Laboratory, Richland, Washington 99352, USAMeasurement of the temporal evolution of laser-produced plasma temperature is very important for many of its applications, and several plasma diagnostic tools are routinely used by researchers. However, it is very challenging to measure the properties of the plasma at the early and late times of its evolution using a single diagnostic tool. In this study, we combined emission and laser absorption spectroscopy to compare the excitation temperatures of a laser-produced uranium plasma system. Several U I transitions in the near-infrared spectral range (775–800 nm) were considered, and the Boltzmann plot method was used to measure the excitation temperatures using both emission and absorption spectroscopy. Emission spectroscopy provided early-time temperature measurements of the plasma up to times 2–20 µs, while absorption spectroscopy provided temperature measurements at late times of plasma evolution (for times 5–80 µs). The emission and absorbance of U I transitions were found to follow the Boltzmann distribution, indicating the plasma is likely in the state of local thermodynamic equilibrium even at late times of its lifetime. The emission and absorption-based time-resolved excitation temperatures demonstrated good agreement at earlier times (≤15 µs) in the overlapped temporal region, while a deviation in the measured values was seen at times (≥15 µs), and potential reasons for such a disagreement are discussed.http://dx.doi.org/10.1063/5.0190522 |
| spellingShingle | M. P. Polek M. C. Phillips F. N. Beg S. S. Harilal Comparison of excitation temperature of a laser-produced plasma by combining emission and absorption spectroscopy AIP Advances |
| title | Comparison of excitation temperature of a laser-produced plasma by combining emission and absorption spectroscopy |
| title_full | Comparison of excitation temperature of a laser-produced plasma by combining emission and absorption spectroscopy |
| title_fullStr | Comparison of excitation temperature of a laser-produced plasma by combining emission and absorption spectroscopy |
| title_full_unstemmed | Comparison of excitation temperature of a laser-produced plasma by combining emission and absorption spectroscopy |
| title_short | Comparison of excitation temperature of a laser-produced plasma by combining emission and absorption spectroscopy |
| title_sort | comparison of excitation temperature of a laser produced plasma by combining emission and absorption spectroscopy |
| url | http://dx.doi.org/10.1063/5.0190522 |
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