Correlation between laser absorption and radiation conversion efficiency in laser produced tin plasma

Journal Article · Mon Sep 21 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4931698· OSTI ID:22482109

Matsukuma, Hiraku; Hosoda, Tatsuya; Fujioka, Shinsuke; Nishimura, Hiroaki ^[1]; Sunahara, Atsushi ^[2]; Yanagida, Tatsuya; Tomuro, Hiroaki; Kouge, Kouichiro; Kodama, Takeshi ^[3]

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1. Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita 565-0871 (Japan)
2. Institute of Laser Technology, 2-6 Yamadaoka, Suita 565-0871 (Japan)
3. Gigaphoton, Inc., 3-25-1 Shinomiya, Hiratsuka 254-8555 (Japan)

The correlation between the laser absorption and the conversion efficiency (CE) for 13.5 nm extreme ultraviolet (EUV) light in a laser-produced tin plasma was investigated. The absorption rate α and the CE were measured simultaneously for a laser-pre-formed low-density tin target as a function of the time delay between the pre-pulse and the main laser pulse. A clear and positive correlation between α and CE was found with increasing delay time; however, the CE decreases rapidly at longer delay times. This result is partly attributed to a reduction in the absorption rate, but is mainly attributed to the self-absorption of EUV light in excessively long-scale plasmas.

• OSTI ID: 22482109
• Journal Information: Applied Physics Letters, Vol. 107, Issue 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONVERSION
CORRELATIONS
DENSITY
EFFICIENCY
EXTREME ULTRAVIOLET RADIATION
LASERS
PLASMA
PULSES
SELF-ABSORPTION
TIN