Confirming X-ray Parametric Down Conversion by Time-Energy Correlation
Abstract
We present measurements of X-ray Parametric Down Conversion at the Advanced Photon Source synchrotron facility. Using an incoming pump beam at 22 keV, we observe the simultaneous, elastic emission of down-converted photon pairs generated in a diamond crystal. The pairs are detected using high count rate silicon drift detectors with low noise. Production by down-conversion is confirmed by measuring time-energy correlations in the detector signal, where photon pairs within an energy window ranging from 10 to 12 keV are only observed at short time differences. By systematically varying the crystal misalignment and detector positions, we obtain results that are consistent with the constant total of the down-converted signal. Our maximum rate of observed pairs was 130 /hour, corresponding to a conversion efficiency for the down-conversion process of .
Cite
@article{arxiv.2309.13197,
title = {Confirming X-ray Parametric Down Conversion by Time-Energy Correlation},
author = {N. J. Hartley and D. Hodge and T. Buckway and R. Camacho and P. Chow and E. Christie and A. Gleason and S. Glenzer and A. Halavanau and A. M. Hardy and C. Recker and S. Sheehan and S. Shwartz and H. Tarvin and M. Ware and J. Wunschel and Y. Xiao and R. L. Sandberg and G. Walker},
journal= {arXiv preprint arXiv:2309.13197},
year = {2023}
}