Soft-X-ray lasing in nickel-like barium at 9.2 nm using the grazing-incidence scheme |
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| Authors: | F Staub C Imesch D Bleiner JE Balmer |
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| Institution: | 1. Graduate Research Assistant, Department of Animal and Range Science, New Mexico State University, Las Cruces, NM 88003, USA;;2. Professor, Agronomy and Horticulture Department, University of Nebraska–Lincoln, Lincoln, NE 68583, USA;;3. Professor, University of Nebraska–Lincoln, West Central Research and Extension Center, North Platte, NE 69101, USA;;4. Professor, Department of Statistics, University of Nebraska–Lincoln, Lincoln, NE 68583, USA;;5. Extension Cow–Calf Educator, University of Minnesota Cooperative Extension Service, North Central Research and Outreach Center, Grand Rapids, MN 55744, USA;6. Extension Educator, University of Nebraska–Lincoln, Ainsworth, NE 69210, USA. |
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| Abstract: | We report on the experimental demonstration of saturated X-ray lasing on the 4 d → 4p, J = 0–1 line of nickel-like barium (Ba, Z = 56) at a wavelength of 9.2 nm, using a main pulse energy of 9 J in a 1.5-ps duration pulse from a Nd:glass chirped-pulse amplification laser. Gain saturation was achieved by applying a triple-pulse scheme in which a weak (few-percent) prepulse, preceding the main pulse by 2.4 ns, is followed by a second, relatively intense (16%) prepulse ~ 50 ps before the main pulse. For handling convenience, compound targets of BaF2 were used, either in the form of windows or coated onto glass slides. |
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