SXR radiation from recombining laser produced plasma of carbon

• Published in: Journal of electron spectroscopy and related phenomena 1999-06, Vol.101, p.903-905
• Main Authors: Kopytova, T.G, Simanovskii, D.M, Sorokin, A.A, Bobashev, S.V
• Format: Article
• Language: English
• Subjects: Carbon plasma; Recombining; SXR radiation
• ISSN: 0368-2048; 1873-2526
• DOI: 10.1016/S0368-2048(98)00412-5

The X-ray emission of an expanding carbon laser produced plasma (LPP) was investigated in a spectral range from 27 Å to 45 Å. Measurements were performed with spectral, spatial and time resolution, that allowed us to follow the plasma evolution during its expansion from the target. It was found that in the wavelength range investigated two lines dominate in the spectrum: 1s 2–1s2p line He-like carbon ( λ=40.2 Å) and 1s–2p line in H-like carbon ( λ=33.7 Å). Intensities of these lines were measured at distances from 5 mm to 15 mm from the target, and relative populations of the upper levels were determined. It is concluded that within this range of distances plasma became recombining and three body recombination is dominating. The data obtained allowed us to estimate absolute concentrations of the C +4 and C +5 ions particularly in the metastable states. It is shown that a planned experiment on laser induced generation of X-rays [1] in carbon plasma is rather feasible.