Optimizing MeV photon dose generation in laser-solid interactions via stable beam propagation
Bremsstrahlung MeV x rays with high doses are essential for radiography of dense objects. Intense, short-pulse laser-driven MeV x-ray sources offer a promising solution, but understanding how the dose scales with laser intensity is crucial for their development. While theory predicts a square root s...
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-05-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.7.023169 |
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| author | A. S. Bogale L. Yin S. Palaniyappan J. Strehlow S. V. Luedtke C.-S. Wong D. Stark D. C. Gautier J. C. Fernandez A. Van Pelt L. T. Mix J. Twardowski R. Fitzgarrald F. N. Beg B. J. Albright |
| author_facet | A. S. Bogale L. Yin S. Palaniyappan J. Strehlow S. V. Luedtke C.-S. Wong D. Stark D. C. Gautier J. C. Fernandez A. Van Pelt L. T. Mix J. Twardowski R. Fitzgarrald F. N. Beg B. J. Albright |
| author_sort | A. S. Bogale |
| collection | DOAJ |
| description | Bremsstrahlung MeV x rays with high doses are essential for radiography of dense objects. Intense, short-pulse laser-driven MeV x-ray sources offer a promising solution, but understanding how the dose scales with laser intensity is crucial for their development. While theory predicts a square root scaling with laser intensity, experimental verification has been hindered by significant shot-to-shot variations, often exacerbated by long preplasma scale lengths from low laser contrast. Here, we demonstrate low shot-to-shot dose variation and confirm the theoretical scaling using high-contrast OMEGA EP laser interactions with millimeter-thick tantalum foils, achieving MeV x-ray doses up to 5.4 rad at 1 m for E_{photon}> 500 keV. Simulations reveal that the unique focal spot of the OMEGA EP laser enables efficient x-ray generation and reduced variability by facilitating deeper laser penetration into dense plasma, even with shorter preplasma scale lengths. |
| format | Article |
| id | doaj-art-e830e50647c14bab9b4269a44c1b18a7 |
| institution | OA Journals |
| issn | 2643-1564 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-e830e50647c14bab9b4269a44c1b18a72025-08-20T01:52:11ZengAmerican Physical SocietyPhysical Review Research2643-15642025-05-017202316910.1103/PhysRevResearch.7.023169Optimizing MeV photon dose generation in laser-solid interactions via stable beam propagationA. S. BogaleL. YinS. PalaniyappanJ. StrehlowS. V. LuedtkeC.-S. WongD. StarkD. C. GautierJ. C. FernandezA. Van PeltL. T. MixJ. TwardowskiR. FitzgarraldF. N. BegB. J. AlbrightBremsstrahlung MeV x rays with high doses are essential for radiography of dense objects. Intense, short-pulse laser-driven MeV x-ray sources offer a promising solution, but understanding how the dose scales with laser intensity is crucial for their development. While theory predicts a square root scaling with laser intensity, experimental verification has been hindered by significant shot-to-shot variations, often exacerbated by long preplasma scale lengths from low laser contrast. Here, we demonstrate low shot-to-shot dose variation and confirm the theoretical scaling using high-contrast OMEGA EP laser interactions with millimeter-thick tantalum foils, achieving MeV x-ray doses up to 5.4 rad at 1 m for E_{photon}> 500 keV. Simulations reveal that the unique focal spot of the OMEGA EP laser enables efficient x-ray generation and reduced variability by facilitating deeper laser penetration into dense plasma, even with shorter preplasma scale lengths.http://doi.org/10.1103/PhysRevResearch.7.023169 |
| spellingShingle | A. S. Bogale L. Yin S. Palaniyappan J. Strehlow S. V. Luedtke C.-S. Wong D. Stark D. C. Gautier J. C. Fernandez A. Van Pelt L. T. Mix J. Twardowski R. Fitzgarrald F. N. Beg B. J. Albright Optimizing MeV photon dose generation in laser-solid interactions via stable beam propagation Physical Review Research |
| title | Optimizing MeV photon dose generation in laser-solid interactions via stable beam propagation |
| title_full | Optimizing MeV photon dose generation in laser-solid interactions via stable beam propagation |
| title_fullStr | Optimizing MeV photon dose generation in laser-solid interactions via stable beam propagation |
| title_full_unstemmed | Optimizing MeV photon dose generation in laser-solid interactions via stable beam propagation |
| title_short | Optimizing MeV photon dose generation in laser-solid interactions via stable beam propagation |
| title_sort | optimizing mev photon dose generation in laser solid interactions via stable beam propagation |
| url | http://doi.org/10.1103/PhysRevResearch.7.023169 |
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