Spectrally peaked proton beams shock accelerated from an optically shaped overdense gas jet by a near-infrared laser
| Autor: | Hicks, George S., Ettlinger, Oliver C., Borghesi, Marco, Carroll, David C., Clarke, Robert J., Ditter, Emma-Jane, Frazer, Timothy P., Gray, Ross J., McIlvenny, Aodhan, McKenna, Paul, Palmer, Charlotte A. J., Willingale, Louise, Najmudin, Zulfikar |
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| Rok vydání: | 2021 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We report on the generation of impurity-free proton beams from an overdense gas jet driven by a near-infrared laser ($\lambda_L=1.053$ $\mathrm{\mu} m$). The gas profile was shaped prior to the interaction using a controlled prepulse. Without this optical shaping, a 30$\pm$4 nCsr$^{-1}$ thermal spectrum was detected transversely to the laser propagation direction with a high energy 8.27$\pm$7 MeV, narrow energy spread (6$\pm$2 %) bunch containing 45$\pm$7 pCsr$^{-1}$. In contrast, with optical shaping the radial component was not detected and instead forward going protons were detected with energy 1.32$\pm$2 MeV, 12.9$\pm$3 % energy spread, and charge 400$\pm$30 pCsr$^{-1}$. Both the forward going and radial narrow energy spread features are indicative of collisionless shock acceleration of the protons. Comment: 14 pages, 8 figures |
| Databáze: | arXiv |
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