23 August 2017 Compact linac-driven light sources utilizing mm-period RF undulators
Author Affiliations +
Conventional synchrotron light sources and Free-Electron Lasers (FELs) utilize permanent magnet undulators with periods on the order of a few centimeters, and to generate X-rays they need GeV scale electron beam energies. Such facilities are very large and expensive. Inverse Compton scattering sources use a laser beam as an undulator with micrometer periods and produce X-ray energies on the order of tens of keV. These sources operate with MeV scale beam energies, and therefore they are much more compact. However, their average photon flux is typically small, especially in the EUV and soft X-ray regime. We present a novel compact linac-driven light source, which could produce both incoherent and FEL radiation depending on its configuration. This source is based on a mm-period RF undulator. The RF undulator is a mm-wave cavity resonating at a deflecting mode. The source operates as follows: a train of electron bunches is generated in a thermionic X-band RF injector. These bunches are accelerated in an X-band linac and then interact with the RF undulator. The RF power that feeds the undulator is extracted from the electron beam in a decelerating RF structure, located downstream of the undulator. As an example, a light source with a 91.392 GHz RF undulator and a 129 MeV electron beam can generate incoherent EUV radiation at 13.5 nm. Such a light source could be less than 6 m long, and potentially be used for EUV mask metrology. Similar approach will enable soft X-Ray imaging.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
F. Toufexis, F. Toufexis, V. A. Dolgashev, V. A. Dolgashev, C. Limborg-Deprey, C. Limborg-Deprey, S. G. Tantawi, S. G. Tantawi, } "Compact linac-driven light sources utilizing mm-period RF undulators", Proc. SPIE 10387, Advances in Laboratory-based X-Ray Sources, Optics, and Applications VI, 1038704 (23 August 2017); doi: 10.1117/12.2274296; https://doi.org/10.1117/12.2274296


Femtosecond scale x ray FEL diagnostics with the LCLS X...
Proceedings of SPIE (October 08 2014)
Commissioning for the European XFEL facility
Proceedings of SPIE (June 14 2017)
A 1kW EUV source for lithography based on FEL emission...
Proceedings of SPIE (October 16 2017)
User's perspective on x-ray FELs
Proceedings of SPIE (May 15 1997)

Back to Top