Energy shift of the Lβ2 line as an ionization diagnostic for the dense plasma in the PFRP

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:408

Article; Proceedings Paper

Pereira, Nino R.¹  Weber, B. V.²  Seely, J. F.³  Weder, E.⁴  Slabkowska, K.⁴  Syrocki, L.⁴  Polasik, M.⁴ 

[1] Ecopulse Inc, 7844 Vervain Ct, Springfield, VA 22152 USA

[2] Naval Res Lab, Washington, DC 20375 USA

[3] Berkeley Res Associates Inc, 6537 Mid Cities Ave, Beltsville, MD 20705 USA

[4] Nicolaus Copernicus Univ Torun, Fac Chem, Gagarina 7, PL-87100 Torun, Poland

关键词: X-ray spectroscopy;    Ionization energy shift;    Pulsed power;   

DOI  :  10.1016/j.nimb.2017.05.014

来源: Elsevier

【 摘 要 】

On modest ionization, the change in the photon energies of characteristic K- and L-lines from high-Z (Z similar to 75) ions can be used as an ionization diagnostic (Slabkowska et al., 2014). Indeed, the line shape of the L beta(2) line in a spatially resolved but time-averaged L-shell spectrum from a tungsten Plasma Filled Rod Pinch plasma suggested ionization states up to W+28. Here the L beta(2) line is measured with nanosecond time resolution to determine the plasma's ionization as it varies in time. Together with the plasma temperature from the black-body radiation and the pressure from the expansion history, such a measurement could eventually determine the plasma's equation of state. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free