Extending transmission crystal x-ray spectroscopy to moderate-intensity laser driven sources

Published

March 17, 2012

Author(s)

Lawrence T. Hudson, J. Y. Mao, L. M. Chen, John F. Seely, L. Zhang, Y. Q. Sun, X. X. Lin, J. Zhang

Abstract

We present spectroscopic measurements of characteristic Kα and Kβ emissions from Mo targets irradiated by a 100 fs, 200 mJ, Ti: sapphire laser with intensity of 1017 W/cm2 to 1018 W/cm2 per pulse. This research pursues novel x-ray sources for medical imaging and appropriate diagnostics for laser-produced x rays. In the present work, we obtained resolving powers (E/ΔE) around 300 for Mo Kα2 at 17.37 keV by using a transmission curved-crystal spectrometer and off-Rowland Circle imaging, while maintaining an end-to-end spectrometer efficiency of (9.69 ± 2.00) × 10-6. This sensitivity is sufficient for registering spectral lines with high signal-to-background from targets following irradiation by a single laser pulse, demonstrating the utility of this diagnostic method in the study of medium-intensity femtosecond laser driven x-ray sources.

Citation

Review of Scientific Instruments

Pub Type

Journals

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Keywords

femosecond, laser-production, spectrometer, x-ray

Citation

Hudson, L. , Mao, J. , Chen, L. , Seely, J. , Zhang, L. , Sun, Y. , Lin, X. and Zhang, J. (2012), Extending transmission crystal x-ray spectroscopy to moderate-intensity laser driven sources, Review of Scientific Instruments, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910310 (Accessed April 20, 2024)