A new hybrid target concept for multi-keV X-ray sources

M. Primout*, D. Babonneau, L. Jacquet, B. Villette, F. Girard, D. Brebion, P. Stemmler, K. B. Fournier, R. Marrs, M. J. May, R. F. Heeter, R. J. Wallace, H. Nishimura, S. Fujioka, M. Tanabe, H. Nagai

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A novel concept for using hybrid targets to create multi-key X-ray sources was tested on the GEKKO XII facility of the OSAKA University and on the OMEGA facility of the University of Rochester. The sources were made via laser irradiation of a titanium foil placed at the end of a plastic cylinder, filled with a very low-density (2 and 5 mg/cm(3)) silicon-dioxide aerogel that was designed to control the longitudinal expansion of the titanium plasma. Preliminary calculations were used to determine optimal conditions for the aerogel density, cylinder diameter and length that maximize multi-keV X-ray emission. The X-ray emission power was measured on OMEGA using absolutely calibrated broad-band, diode-based CEA diagnostics, in addition to high resolution crystal spectrometers. On GEKKO XII, the heat wave propagation velocity in the aerogel was also measured with an X-ray framing camera. The advantage of using the thermal wave generated in the aerogel to heat a solid material to increase the conversion efficiency has not been fully demonstrated in these experiments. However, it was shown that a 5 mg/cm(3) aerogel placed in front of a titanium foil can improve the x-ray conversion efficiency with respect to the case of 2 mg/cm(3) for some target diameter and length. (C) 2013 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)750-760
Number of pages11
JournalHigh energy density physics
Volume9
Issue number4
Early online date25 Sep 2013
DOIs
Publication statusPublished - Dec 2013

Keywords

  • x-ray sources
  • radiative hydrodynamics
  • titanium
  • silicon dioxide aerogel
  • omega laser
  • gekko laser
  • propagation
  • plasmas
  • model

Cite this

Primout, M., Babonneau, D., Jacquet, L., Villette, B., Girard, F., Brebion, D., Stemmler, P., Fournier, K. B., Marrs, R., May, M. J., Heeter, R. F., Wallace, R. J., Nishimura, H., Fujioka, S., Tanabe, M., & Nagai, H. (2013). A new hybrid target concept for multi-keV X-ray sources. High energy density physics, 9(4), 750-760. https://doi.org/10.1016/j.hedp.2013.09.002