Speaker
Description
We present results from the ELI50122 campaign using the ELI-NP 10 PW beamline. We observed multi-PW-driven LWFA in a transitional regime where PWFA takes over the high-energy boosting stage. Using a nitrogen-doped helium gas at electron densities of 4-6 × 10¹⁷ cm⁻³ favored this transition, demonstrating beams of multi-nC charge with a clear dependence on the N₂ concentration.
The experimental results show energies of 8-10 GeV in a 15.5 cm gas cell and energy boosting following a switch to a 28 cm long acceleration medium. When the electron beam driver takes over the acceleration, we observe electron bunches peaking as high as 17.1 ± 2.0 GeV, with the tail extending beyond 20 GeV. The bunch had 22.1 ± 5.5 pC charge confined to a divergence below 1 mrad.
Total beam charge in this experiment reaches 3 nC above 2 GeV with >100 pC above 10 GeV in selected cases. The results represent a significant advance over past achievements in this field, doubling the maximum energy and obtaining 1.5-1.9× higher peaks for the bunches.
| Working group | WG1 |
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