Spectrotemporal shaping of attosecond x-ray pulses with a fresh-slice free-electron laser
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866917918088888320 |
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| author | Robles, River R. Larsen, Kirk A. Cesar, David Driver, Taran Duris, Joseph Franz, Paris Garratt, Douglas Guo, Veronica Just, Gabriel Lemons, Randy Lin, Ming-Fu Obaid, Razib Sudar, Nicholas Wang, Jun Zhang, Zhen Cryan, James Marinelli, Agostino |
| author_facet | Robles, River R. Larsen, Kirk A. Cesar, David Driver, Taran Duris, Joseph Franz, Paris Garratt, Douglas Guo, Veronica Just, Gabriel Lemons, Randy Lin, Ming-Fu Obaid, Razib Sudar, Nicholas Wang, Jun Zhang, Zhen Cryan, James Marinelli, Agostino |
| contents | We propose a scheme allowing coherent shaping, i.e., controlling both the amplitude and phase, of attosecond x-ray pulses at free-electron lasers. We show that by seeding an FEL with a short coherent seed that overfills the amplification bandwidth, one can shape the Wigner function of the pulse by controlling the undulator taper profile. The examples of controllable pulse pairs and trains, as well as isolated spectrotemporally shaped pulses with very broad bandwidths are examined in detail. Existing attosecond XFELs can achieve these experimental conditions in a two-stage cascade, in which the seed is generated by a short current spike in an electron bunch and shaped in an unspoiled region within the same bunch. We experimentally demonstrate the production and control of phase-stable pulse trains using this method at the Linac Coherent Light Source II. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_02189 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spectrotemporal shaping of attosecond x-ray pulses with a fresh-slice free-electron laser Robles, River R. Larsen, Kirk A. Cesar, David Driver, Taran Duris, Joseph Franz, Paris Garratt, Douglas Guo, Veronica Just, Gabriel Lemons, Randy Lin, Ming-Fu Obaid, Razib Sudar, Nicholas Wang, Jun Zhang, Zhen Cryan, James Marinelli, Agostino Accelerator Physics Optics Plasma Physics We propose a scheme allowing coherent shaping, i.e., controlling both the amplitude and phase, of attosecond x-ray pulses at free-electron lasers. We show that by seeding an FEL with a short coherent seed that overfills the amplification bandwidth, one can shape the Wigner function of the pulse by controlling the undulator taper profile. The examples of controllable pulse pairs and trains, as well as isolated spectrotemporally shaped pulses with very broad bandwidths are examined in detail. Existing attosecond XFELs can achieve these experimental conditions in a two-stage cascade, in which the seed is generated by a short current spike in an electron bunch and shaped in an unspoiled region within the same bunch. We experimentally demonstrate the production and control of phase-stable pulse trains using this method at the Linac Coherent Light Source II. |
| title | Spectrotemporal shaping of attosecond x-ray pulses with a fresh-slice free-electron laser |
| topic | Accelerator Physics Optics Plasma Physics |
| url | https://arxiv.org/abs/2403.02189 |