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Radiative Opacity of Dense Iron Plasma
59,00 € *
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The radiative properties of plasmas are governed by opacity and emissivity. Accurate determinations of these quantities are of relevance, therefore, to inertially confined nuclear fusion (particularly indirect drive schemes) and to resolving discrepancies between the observed behavior of astrophysical plasmas and theory. This work summarises achievements in the field over the last few decades. It also presents the results of experiments to (i) determine the opacity of warm to hot, dense iron plasma and (ii) investigate laser ablation rates using the transmission through sample targets of x-ray laser pulses. These results are compared with the predictions of computer simulations. Laser ablation rates are of relevance to direct drive nuclear fusion and other technologies such as laser welding and materials deposition. Experimental work was undertaken using a nickel-like silver x-ray laser (XRL) of 13.9 nm wavelength at the Rutherford Appleton Laboratory and a 21.2 nm neon-like zinc XRL at the Prague Asterix Laser System.

Anbieter: Dodax
Stand: 25.05.2020
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Characterization of Laser Doped Silicon and Ove...
83,00 € *
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The combination of localized laser patterning and metal plating allows to replace conventional silver screen printing with nickel-copper plating to form inexpensive front contacts for crystalline silicon solar cells. In this work, a focus is put on effects that could cause inhomogeneous metal deposition and low metal contact adhesion. A descriptive model of the silicon nitride ablation mechanism is derived from SEM imaging and a precise recombination analysis using QSSPC measurements. Surface sensitive XPS measurements are conducted to prove the existence of a parasitic surface layer, identified as SiOxNy. The dense SiOxNy layer is an effective diffusion barrier, hindering the formation of a nickel silicide interlayer. After removal of the SiOxNy layer, cells show severe degradation caused by metal-induced shunting. These shunts are imaged using reverse biased electroluminescence imaging. A shunting mechanism is proposed and experimentally verified. New laser process sequences are devised and proven to produce cells with adhering Ni-Cu contacts. Conclusively the developed processes are assessed based on their industrial feasibility as well as on their efficiency potential.

Anbieter: Dodax
Stand: 25.05.2020
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Radiative Opacity of Dense Iron Plasma
96,90 CHF *
ggf. zzgl. Versand

The radiative properties of plasmas are governed by opacity and emissivity. Accurate determinations of these quantities are of relevance, therefore, to inertially confined nuclear fusion (particularly indirect drive schemes) and to resolving discrepancies between the observed behavior of astrophysical plasmas and theory. This work summarises achievements in the field over the last few decades. It also presents the results of experiments to (i) determine the opacity of warm to hot, dense iron plasma and (ii) investigate laser ablation rates using the transmission through sample targets of x-ray laser pulses. These results are compared with the predictions of computer simulations. Laser ablation rates are of relevance to direct drive nuclear fusion and other technologies such as laser welding and materials deposition. Experimental work was undertaken using a nickel-like silver x-ray laser (XRL) of 13.9 nm wavelength at the Rutherford Appleton Laboratory and a 21.2 nm neon-like zinc XRL at the Prague Asterix Laser System.

Anbieter: Orell Fuessli CH
Stand: 25.05.2020
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Radiative Opacity of Dense Iron Plasma
51,99 € *
ggf. zzgl. Versand

The radiative properties of plasmas are governed by opacity and emissivity. Accurate determinations of these quantities are of relevance, therefore, to inertially confined nuclear fusion (particularly indirect drive schemes) and to resolving discrepancies between the observed behavior of astrophysical plasmas and theory. This work summarises achievements in the field over the last few decades. It also presents the results of experiments to (i) determine the opacity of warm to hot, dense iron plasma and (ii) investigate laser ablation rates using the transmission through sample targets of x-ray laser pulses. These results are compared with the predictions of computer simulations. Laser ablation rates are of relevance to direct drive nuclear fusion and other technologies such as laser welding and materials deposition. Experimental work was undertaken using a nickel-like silver x-ray laser (XRL) of 13.9 nm wavelength at the Rutherford Appleton Laboratory and a 21.2 nm neon-like zinc XRL at the Prague Asterix Laser System.

Anbieter: Thalia AT
Stand: 25.05.2020
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