Low-divergence femtosecond X-ray pulses from a passive plasma lens

Björklund Svensson, Jonas; Guénot, Diego; Ferri, Julien; Ekerfelt, Henrik; Gallardo González, Isabel; Persson, Anders; Svendsen, Kristoffer; Veisz, László; Lundh, Olle

doi:10.1038/s41567-020-01158-z

Low-divergence femtosecond X-ray pulses from a passive plasma lens

Journal Article · Mon Feb 15 00:00:00 EST 2021 · Nature Physics

DOI:https://doi.org/10.1038/s41567-020-01158-z· OSTI ID:1766450

^[1]; ^[1]; ^[2]; ^[3]; Gallardo González, Isabel ^[1]; Persson, Anders ^[1]; Svendsen, Kristoffer ^[1]; ^[4]; ^[1]

Lund Univ. (Sweden)
Chalmers Univ. of Technology, Gothenburg (Sweden); Univ. of Gothenburg (Sweden)
Lund Univ. (Sweden); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Umeå Univ. (Sweden)

Electron and X-ray beams originating from compact laser-wakefield accelerators have very small source sizes that are typically on the micrometre scale. Therefore, the beam divergences are relatively high, which makes it difficult to preserve their high quality during transport to applications. To improve on this, tremendous efforts have been invested in controlling the divergence of the electron beams, but no mechanism for generating collimated X-ray beams has yet been demonstrated experimentally. Here we propose and realize a scheme where electron bunches undergoing focusing in a dense, passive plasma lens can emit X-ray pulses with divergences approaching the incoherent limit. Furthermore, compared with conventional betatron emission, the divergence of this so-called plasma lens radiation is reduced by more than an order of magnitude in solid angle, while maintaining a similar number of emitted photons per electron. This X-ray source offers the possibility of producing brilliant and collimated few-femtosecond X-ray pulses for ultra-fast science, in particular for studies based on X-ray diffraction and absorption spectroscopy.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: European Research Council (ERC); Knut and Alice Wallenberg Foundation; Swedish Research Council (VR); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1766450

Report Number(s):: SLAC-PUB--17590

Journal Information:: Nature Physics, Journal Name: Nature Physics Journal Issue: 5 Vol. 17; ISSN 1745-2473

Publisher:: Nature Publishing Group (NPG)Copyright Statement

Country of Publication:: United States

Language:: English

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Low-divergence femtosecond X-ray pulses from a passive plasma lens

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