High resolution X-ray spectroscopy in fast electron transport studies by Koester, P, Booth, N, Cecchetti, C, Chen, H, Evans, R, Gregori, G, Labate, L, Levato, T, Li, B, Makita, M, Mithen, J, Murphy, C, Notley, M, Pattathil, R, Riley, D, Woolsey, N, Gizzia, L