| Autor: |
S. Bolaños, J. Béard, G. Revet, S. N. Chen, S. Pikuz, E. Filippov, M. Safronova, M. Cerchez, O. Willi, M. Starodubtsev, J. Fuchs |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Matter and Radiation at Extremes, Vol 4, Iss 4, Pp 044401-044401-8 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2468-080X |
| DOI: |
10.1063/1.5082330 |
| Popis: |
Laser irradiation of solid targets can drive short and high-charge relativistic electron bunches over micron-scale acceleration gradients. However, for a long time, this technique was not considered a viable means of electron acceleration due to the large intrinsic divergence (∼50° half-angle) of the electrons. Recently, a reduction in this divergence to 10°–20° half-angle has been obtained, using plasma-based magnetic fields or very high contrast laser pulses to extract the electrons into the vacuum. Here we show that we can further improve the electron beam collimation, down to ∼1.5° half-angle, of a high-charge (6 nC) beam, and in a highly reproducible manner, while using standard stand-alone 100 TW-class laser pulses. This is obtained by embedding the laser-target interaction in an external, large-scale (cm), homogeneous, extremely stable, and high-strength (20 T) magnetic field that is independent of the laser. With upcoming multi-PW, high repetition-rate lasers, this technique opens the door to achieving even higher charges (>100 nC). |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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