Enhancement of Gain Coefficient of Li-Like Ion 3Id/I-4If/I Soft X-ray Laser Oscillation by a Single Resonator

A recombination plasma soft X-ray laser that is associated with Li-like Aluminum ion Al[sup.10+] 3d-4f transition (wavelength: 15.47 nm) was investigated to increase the gain coefficient. By optimizing the time interval of the 16-pulse train, higher-density plasma with a low temperature could be gen...

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Veröffentlicht in:Atoms 2022-11, Vol.10 (4)
Hauptverfasser: Namba, Shinichi, Wang, Jiahao, Ohiro, Hikari, Zhang, Jiawei, Kishimoto, Maki, Yamasaki, Kotaro, Hasegawa, Noboru, Dinh, Thanhhung, Ishino, Masahiko, Higashiguchi, Takeshi, Nishikino, Masaharu
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Sprache:eng
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Zusammenfassung:A recombination plasma soft X-ray laser that is associated with Li-like Aluminum ion Al[sup.10+] 3d-4f transition (wavelength: 15.47 nm) was investigated to increase the gain coefficient. By optimizing the time interval of the 16-pulse train, higher-density plasma with a low temperature could be generated, and thus, we obtained the gain coefficient of 9.84 cm[sup.−1] at the pump laser pulse energy which was as low as 3 J. To further enhance the X-ray laser output energy, the single resonator which was installed by using a Mo/Si multilayer mirror that has a high reflectivity of 0.45 at 15.5 nm, and the X-ray spectrum after the double pass in the lasing medium was measured. As a result, the output intensity was increased to be 1.5 times higher than t=when it was compared with those that were conducted with no X-ray mirror.
ISSN:2218-2004
2218-2004
DOI:10.3390/atoms10040128