Ion acceleration by an ultrashort laser pulse interacting with a near-critical-density gas jet
| Autor: | Ehret, M., Salgado-Lopez, C., Ospina-Bohorquez, V., Perez-Hernandez, J. A., Huault, M., de Marco, M., Apinaniz, J. I., Hannachi, F., De Luis, D., Toro, J. Hernandez, Arana, D., Mendez, C., Varela, O., Debayle, A., Gremillet, L., Nguyen-Bui, T. -H., Olivier, E., Revet, G., Bukharskii, N. D., Larreur, H., Caron, J., Vlachos, C., Ceccotti, T., Raffestin, D., Nicolai, P., Feugeas, J. L., Roth, M., Vaisseau, X., Gatti, G., Volpe, L., Santos, J. J. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We demonstrate laser-driven Helium ion acceleration with cut-off energies above 25 MeV and peaked ion number above $10^8$ /MeV for 22(2) MeV projectiles from near-critical density gas jet targets. We employed shock gas jet nozzles at the high-repetition-rate (HRR) VEGA-2 laser system with 3 J in pulses of 30 fs focused down to intensities in the range between $9\times10^{19}$ W/cm$^2$ and $1.2\times10^{20}$ W/cm$^2$. We demonstrate acceleration spectra with minor shot-to-shot changes for small variations in the target gas density profile. Difference in gas profiles arise due to nozzles being exposed to a experimental environment, partially ablating and melting. Comment: 22 pages, 28 figures |
| Databáze: | arXiv |
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