We discuss the physics of a photoluminescence-based pulse-energy detector that will be used to characterize hard x-ray free-electron-laser pulses at the Linac Coherent Light Source. We tested the detector in a quasi-steady-state mode of operation at the conventional synchrotron light source Stanford positron electron assymetric ring 3 at the Stanford Synchrotron Radiation Laboratory. We also developed a Monte-Carlo model for the x-ray interaction with the nitrogen gas and the resulting ultraviolet signal and found good agreement with the experimental data. Remaining discrepancies can, to a large extent, be attributed to the varying luminescence behavior of different chamber wall materials.
Measurement of x-ray free-electron-laser pulse energies by photoluminescence in nitrogen gas
S. P. Hau–Riege, R. M. Bionta, D. D. Ryutov, J. Krzywinski; Measurement of x-ray free-electron-laser pulse energies by photoluminescence in nitrogen gas. J. Appl. Phys. 1 March 2008; 103 (5): 053306. https://doi.org/10.1063/1.2844478
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