Speaker
Description
Inverse Compton Scattering at shallow angles allows for the generation of high-brightness X-rays with spectral control independent of electron beam energy. We present experimental characterization of this interaction at the UCLA Pegasus photoinjector. Our measurements reveal a polarization-dependent suppression, analogous to the optical Brewster effect, not present in conventional counter-propagating geometries. Furthermore, we develop a comprehensive theoretical framework for optimizing the spectral brightness of such sources, accounting for the interplay between electron beam momentum, the crossing angle and laser polarization. Finally, we discuss how this geometry allows for operation in a superradiant emission regime via inverse free electron laser bunching, promising orders-of-magnitude increase in photon yield. We conclude by outlining the experimental roadmap for deploying this superradiant emission scheme at Brookhaven National Laboratory.
Funding Agency
This research is supported by DOE grant No. DE-SC0009914. This work was also partially supported by the National Science Foundation under Grant No. PHY-1549132
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