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1998•Japanese Journal of Applied PhysicsOpen access

Plasma Opening Switch Using Plasmas Produced by a Pulsed CO2 Laser

Satoshi Ihara, Satoshi Mori, Masashi Ishimine, Saburoh Satoh, Chobei Yamabe, Hidenori Akiyama

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Abstract

Plasma opening switches were studied using laser-produced plasmas. In this paper, a CO2 laser (5 J/pulse, 5.5 MW peak power and 10.6 µm wavelength) was used as the plasma source of a plasma opening switch (POS). The plasma parameters were measured using a Faraday cup, a Langmuir probe and a monochromator. It was found that ions with fast flow velocity are required to obtain a short opening time, and thermalized plasma with low velocity lengthens the opening time. However, POS operation was improved by switch modification despite the existence of thermalized plasmas.

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What this paper is about

Plasma opening switches were studied using laser-produced plasmas. In this paper, a CO2 laser (5 J/pulse, 5.5 MW peak power and 10.6 µm wavelength) was used as the plasma source of a plasma opening switch (POS). The plasma parameters were measured using a Faraday cup, a Langmuir probe and a monochromator. It was found that ions with fast flow velocity are required to obtain a short opening time, and thermalized plasma with low velocity lengthens the opening time. However, POS operation was improved by switch modification despite the existence of thermalized plasmas.

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Available abstract

Plasma opening switches were studied using laser-produced plasmas. In this paper, a CO2 laser (5 J/pulse, 5.5 MW peak power and 10.6 µm wavelength) was used as the plasma source of a plasma opening switch (POS). The plasma parameters were measured using a Faraday cup, a Langmuir probe and a monochromator. It was found that ions with fast flow velocity are required to obtain a short opening time, and thermalized plasma with low velocity lengthens the opening time. However, POS operation was improved by switch modification despite the existence of thermalized plasmas.

Key concepts: Plasma, Faraday cup, Monochromator, Atomic physics, Laser, Wavelength, Langmuir probe, Faraday cage

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