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  Polarization control in an X-ray free-electron laser.

Lutman, A. A., MacArthur, J. P., Ilchen, M., Lindahl, A. O., Buck, J., Coffee, R. N., et al. (2016). Polarization control in an X-ray free-electron laser. Nature Photonics, 10(7), 468-472. doi:10.1038/nphoton.2016.79.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-74B9-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-DFC9-2
Genre: Journal Article

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 Creators:
Lutman, A. A., Author
MacArthur, J. P., Author
Ilchen, M., Author
Lindahl, A. O., Author
Buck, J., Author
Coffee, R. N., Author
Dakovski, G. L., Author
Dammann, L., Author
Ding, Y., Author
Dürr, H. A., Author
Glaser, L.1, Author              
Grünert, J., Author
Hartmann, G., Author
Hartmann, N., Author
Higley, D., Author
Hirsch, K., Author
Levashov, Y. I., Author
Marinelli, A., Author
Maxwell, T., Author
Mitra, A., Author
Moeller, S., AuthorOsipov, T., AuthorPeters, F., AuthorPlanas, M., AuthorShevchuk, I., AuthorSchlotter, W. F., AuthorScholz, F., AuthorSeltmann, J., AuthorViefhaus, J., AuthorWalter, P., AuthorWolf, Z. R., AuthorHuang, Z., AuthorNuhn, H. D., Author more..
Affiliations:
1Research Group of Structural Dynamics of (Bio)Chemical Systems, MPI for Biophysical Chemistry, Max Planck Society, ou_578564              

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Free keywords: Applied optics; Circular dichroism; Free-electron lasers; Optical physics; X-rays
 Abstract: X-ray free-electron lasers are unique sources of high-brightness coherent radiation. However, existing devices supply only linearly polarized light, precluding studies of chiral dynamics. A device called the Delta undulator has been installed at the Linac Coherent Light Source (LCLS) to provide tunable polarization. With a reverse tapered planar undulator line to pre-microbunch the beam and the novel technique of beam diverting, hundreds of microjoules of circularly polarized X-ray pulses are produced at 500–1,200 eV. These X-ray pulses are tens of femtoseconds long, have a degree of circular polarization of 0.98–0.04+0.02 at 707 eV and may be scanned in energy. We also present a new two-colour X-ray pump–X-ray probe operating mode for the LCLS. Energy differences of ΔE/E = 2.4% are supported, and the second pulse can be adjusted to any elliptical polarization. In this mode, the pointing, timing, intensity and wavelength of the two pulses can be modified.

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Language(s): eng - English
 Dates: 2016-05-092016-07
 Publication Status: Published in print
 Pages: -
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 Rev. Method: Peer
 Identifiers: DOI: 10.1038/nphoton.2016.79
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Title: Nature Photonics
Source Genre: Journal
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Pages: - Volume / Issue: 10 (7) Sequence Number: - Start / End Page: 468 - 472 Identifier: -