Speaker
Description
We report on an effort to create a flexible ultra-narrow, bandwidth (10$^{-5}$ to 10$^{-6}$), high-energy (100 keV to 3 MeV) photon source consisting of a high spectral density Laser Compton Source (LCS) and an ultra-high precision crystal diffractometer. We explain design choices allowing the construction of a LCS with high photon phase space density and pronounced energy-angle correlation. We further demonstrate the realization of a mobile crystal diffractometer with sub-nanoradian angular resolution. The combination of both devices allows to enhance the application space substantially. We explain how to tune center energy and how to narrow the bandwidth down to the intrinsic natural width of nuclear resonances. These capabilities allow to optimize band width for isotope sensitive inspection of materials based on nuclear resonance fluorescence and absorption at large distance from the sample without any spectroscopic capability of the detection system and independent of the time structure of the LCS source. Further we demonstrate options of high energy beam manipulation (focusing, beam steering, dual energy beams) using the combination of an LCS with the crystal diffractometer. In the last part we highlight a few applications of this setup for battery research and nuclear fuel material inspection.
This research is supported in part by the U.S. Department of Defense under DARPA grant HR00112090059.
