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

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.
Authors:
; ; ;  [1] ;  [2] ; ; ; ;  [3]
  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)
Publication Date:
OSTI Identifier:
22482109
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONVERSION; CORRELATIONS; DENSITY; EFFICIENCY; EXTREME ULTRAVIOLET RADIATION; LASERS; PLASMA; PULSES; SELF-ABSORPTION; TIN