Matched Guiding and Controlled Injection in Dark-Current-Free, 10-GeV-Class, Channel-Guided Laser Plasma Accelerators
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| author | Picksley, A. Stackhouse, J. Benedetti, C. Nakamura, K. Tsai, H. E. Li, R. Miao, B. Shrock, J. E. Rockafellow, E. Milchberg, H. M. Schroeder, C. B. van Tilborg, J. Esarey, E. Geddes, C. G. R. Gonsalves, A. J. |
| author_facet | Picksley, A. Stackhouse, J. Benedetti, C. Nakamura, K. Tsai, H. E. Li, R. Miao, B. Shrock, J. E. Rockafellow, E. Milchberg, H. M. Schroeder, C. B. van Tilborg, J. Esarey, E. Geddes, C. G. R. Gonsalves, A. J. |
| contents | We measure the high intensity laser propagation throughout meter-scale, channel-guided LPAs by adjusting the length of the plasma channel on a shot-by-shot basis, showing high quality guiding of 500 TW laser pulses over 30 cm in a hydrogen plasma of density $n_0 \approx 1 \times 10^{17} \, \mathrm{cm^{-3}}$. We observed transverse energy transport of higher-order modes in the first $\approx 12 \, \mathrm{cm}$ of the plasma channel, followed by quasi-matched propagation, and the gradual, dark-current-free depletion of laser energy to the wakefield. We quantify the laser-to-wake transfer efficiency limitations of currently available PW-class laser systems, and demonstrate via simulation how control over the laser mode can significantly improve accelerated beam parameters. Using just 21.3 J of laser energy, and triggering localized electron injection into the accelerator, we observed electron bunches with single, quasimonoenergetic peaks, relative energy spreads as low as 3 % and energy up to 9.2 GeV with charge extending beyond 10 GeV. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2408_00740 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Matched Guiding and Controlled Injection in Dark-Current-Free, 10-GeV-Class, Channel-Guided Laser Plasma Accelerators Picksley, A. Stackhouse, J. Benedetti, C. Nakamura, K. Tsai, H. E. Li, R. Miao, B. Shrock, J. E. Rockafellow, E. Milchberg, H. M. Schroeder, C. B. van Tilborg, J. Esarey, E. Geddes, C. G. R. Gonsalves, A. J. Plasma Physics Accelerator Physics We measure the high intensity laser propagation throughout meter-scale, channel-guided LPAs by adjusting the length of the plasma channel on a shot-by-shot basis, showing high quality guiding of 500 TW laser pulses over 30 cm in a hydrogen plasma of density $n_0 \approx 1 \times 10^{17} \, \mathrm{cm^{-3}}$. We observed transverse energy transport of higher-order modes in the first $\approx 12 \, \mathrm{cm}$ of the plasma channel, followed by quasi-matched propagation, and the gradual, dark-current-free depletion of laser energy to the wakefield. We quantify the laser-to-wake transfer efficiency limitations of currently available PW-class laser systems, and demonstrate via simulation how control over the laser mode can significantly improve accelerated beam parameters. Using just 21.3 J of laser energy, and triggering localized electron injection into the accelerator, we observed electron bunches with single, quasimonoenergetic peaks, relative energy spreads as low as 3 % and energy up to 9.2 GeV with charge extending beyond 10 GeV. |
| title | Matched Guiding and Controlled Injection in Dark-Current-Free, 10-GeV-Class, Channel-Guided Laser Plasma Accelerators |
| topic | Plasma Physics Accelerator Physics |
| url | https://arxiv.org/abs/2408.00740 |