Ultra-high-gain water-window X-ray laser driven by plasma photocathode wakefield acceleration
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866916834032222208 |
|---|---|
| author | Berman, Lily H. A. Campbell, David Hartmann, Edgar Heinemann, Thomas Wilson, Thomas Hidding, Bernhard Habib, Ahmad Fahim |
| author_facet | Berman, Lily H. A. Campbell, David Hartmann, Edgar Heinemann, Thomas Wilson, Thomas Hidding, Bernhard Habib, Ahmad Fahim |
| contents | X-ray free-electron lasers are large and complex machines, limited by electron beam brightness. Here we show through start-to-end simulations how to realise compact, robust and tunable X-ray lasers in the water window, based on ultra-bright electron beams from plasma wakefield accelerators. First, an ultra-low-emittance electron beam is released by a plasma photocathode in a metre-scale plasma wakefield accelerator. By tuning the beam charge, space-charge forces create a balance between beam fields and wakefields that reduces beam energy spread and improves energy stability - both critical for beam extraction, transport, and focusing into a metre-scale undulator. Here, the resulting ultra-bright beams produce wavelength-tunable, coherent, femtosecond scale photon pulses at ultra-high gain. This regime enables reliable generation of millijoule-gigawatt-class X-ray laser pulses across the water window, offering tunability via the witness beam charge and robustness against variations in plasma wakefield strength. Our findings help democratise access to coherent, high-power, soft X-ray radiation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_06403 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultra-high-gain water-window X-ray laser driven by plasma photocathode wakefield acceleration Berman, Lily H. A. Campbell, David Hartmann, Edgar Heinemann, Thomas Wilson, Thomas Hidding, Bernhard Habib, Ahmad Fahim Plasma Physics Accelerator Physics X-ray free-electron lasers are large and complex machines, limited by electron beam brightness. Here we show through start-to-end simulations how to realise compact, robust and tunable X-ray lasers in the water window, based on ultra-bright electron beams from plasma wakefield accelerators. First, an ultra-low-emittance electron beam is released by a plasma photocathode in a metre-scale plasma wakefield accelerator. By tuning the beam charge, space-charge forces create a balance between beam fields and wakefields that reduces beam energy spread and improves energy stability - both critical for beam extraction, transport, and focusing into a metre-scale undulator. Here, the resulting ultra-bright beams produce wavelength-tunable, coherent, femtosecond scale photon pulses at ultra-high gain. This regime enables reliable generation of millijoule-gigawatt-class X-ray laser pulses across the water window, offering tunability via the witness beam charge and robustness against variations in plasma wakefield strength. Our findings help democratise access to coherent, high-power, soft X-ray radiation. |
| title | Ultra-high-gain water-window X-ray laser driven by plasma photocathode wakefield acceleration |
| topic | Plasma Physics Accelerator Physics |
| url | https://arxiv.org/abs/2507.06403 |