Effect of SF6 fluorine donor on the multikilojoule HF chemical laser initiated longitudinally by intense electron beams

Tomoo Fujioka; Fumihiko Kannari; Tadashi Suzuki; Minoru Obara

doi:10.1063/1.335572

Effect of SF₆ fluorine donor on the multikilojoule HF chemical laser initiated longitudinally by intense electron beams

Tomoo Fujioka, Fumihiko Kannari, Tadashi Suzuki, Minoru Obara

Department of Electronics and Electrical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The effects of fluorine donor additives and initiation level on the HF laser output characteristics in a strong and short pulse initiation regime are experimentally and theoretically investigated. Typical parameters of the circular e beam used in the experiment are 2 MV, 60 kA, 65 ns FWHM, and 10 cm in diameter, and the e beam is injected longitudinally. The addition of SF ₆ gas to a mixture of F₂/O₂/H₂ is found to increase not only the specific laser energy but also the electrical laser efficiency. The maximum laser energy obtained from the low-pressure mixture of F₂/SF₆/O₂/H₂=200/84/60/45 (Torr) is 4.4 kJ in a 70 ns FWHM with an electrical laser efficiency of 203% and a chemical laser efficiency of 18.6%. Based on the experimental results, the scaling of the HF laser was established in terms of specific HF laser energy and electrical laser efficiency.

Original language	English
Pages (from-to)	3975-3983
Number of pages	9
Journal	Journal of Applied Physics
Volume	58
Issue number	11
DOIs	https://doi.org/10.1063/1.335572
Publication status	Published - 1985

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Effect of SF6 fluorine donor on the multikilojoule HF chemical laser initiated longitudinally by intense electron beams",

abstract = "The effects of fluorine donor additives and initiation level on the HF laser output characteristics in a strong and short pulse initiation regime are experimentally and theoretically investigated. Typical parameters of the circular e beam used in the experiment are 2 MV, 60 kA, 65 ns FWHM, and 10 cm in diameter, and the e beam is injected longitudinally. The addition of SF 6 gas to a mixture of F2/O2/H2 is found to increase not only the specific laser energy but also the electrical laser efficiency. The maximum laser energy obtained from the low-pressure mixture of F2/SF6/O2/H2=200/84/60/45 (Torr) is 4.4 kJ in a 70 ns FWHM with an electrical laser efficiency of 203% and a chemical laser efficiency of 18.6%. Based on the experimental results, the scaling of the HF laser was established in terms of specific HF laser energy and electrical laser efficiency.",

author = "Tomoo Fujioka and Fumihiko Kannari and Tadashi Suzuki and Minoru Obara",

year = "1985",

doi = "10.1063/1.335572",

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journal = "Journal of Applied Physics",

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T1 - Effect of SF6 fluorine donor on the multikilojoule HF chemical laser initiated longitudinally by intense electron beams

AU - Fujioka, Tomoo

AU - Kannari, Fumihiko

AU - Suzuki, Tadashi

AU - Obara, Minoru

PY - 1985

Y1 - 1985

N2 - The effects of fluorine donor additives and initiation level on the HF laser output characteristics in a strong and short pulse initiation regime are experimentally and theoretically investigated. Typical parameters of the circular e beam used in the experiment are 2 MV, 60 kA, 65 ns FWHM, and 10 cm in diameter, and the e beam is injected longitudinally. The addition of SF 6 gas to a mixture of F2/O2/H2 is found to increase not only the specific laser energy but also the electrical laser efficiency. The maximum laser energy obtained from the low-pressure mixture of F2/SF6/O2/H2=200/84/60/45 (Torr) is 4.4 kJ in a 70 ns FWHM with an electrical laser efficiency of 203% and a chemical laser efficiency of 18.6%. Based on the experimental results, the scaling of the HF laser was established in terms of specific HF laser energy and electrical laser efficiency.

AB - The effects of fluorine donor additives and initiation level on the HF laser output characteristics in a strong and short pulse initiation regime are experimentally and theoretically investigated. Typical parameters of the circular e beam used in the experiment are 2 MV, 60 kA, 65 ns FWHM, and 10 cm in diameter, and the e beam is injected longitudinally. The addition of SF 6 gas to a mixture of F2/O2/H2 is found to increase not only the specific laser energy but also the electrical laser efficiency. The maximum laser energy obtained from the low-pressure mixture of F2/SF6/O2/H2=200/84/60/45 (Torr) is 4.4 kJ in a 70 ns FWHM with an electrical laser efficiency of 203% and a chemical laser efficiency of 18.6%. Based on the experimental results, the scaling of the HF laser was established in terms of specific HF laser energy and electrical laser efficiency.

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Effect of SF₆ fluorine donor on the multikilojoule HF chemical laser initiated longitudinally by intense electron beams

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