Effect of Background Gas on Laser-Induced Electron Emission from Metal Surfaces

Isenor, N. R.

doi:10.1063/1.1713899

Cited by 17 publications

(1 citation statement)

References 2 publications

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“…Such detectors make use of the high voltage that develops on an isolated resistively loaded target in vacuum or low pressure gas as a result of fast electron emission from the plasma. Electron emission and induced target voltages have been studied quite extensively using solid-state laser-produced plasmas (Isenor 1965, Arifov el a1 1969, Pearlman andDahlbacka 1977, Andreev et a1 1968) and more recently CO2 laser-produced plasmas (Giovanielli et a1 1976, Silfvast and Szeto 1977, Bergmann et a1 1980. The possibility of using a plasma cell for the direct conversion of laser radiation to electricity has also been considered by Silfvast and Szeto (1977).…”

Section: Introductionmentioning

confidence: 99%

Voltage pulse generation using CO₂laser irradiated solid target plasmas

Cook

Dyer

1983

J. Phys. D: Appl. Phys.

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Voltage pulses generated as a result of electron emission from a CO2 laser-produced solid target plasma have been studied and analysed with the aim of evaluating the suitability of the plasma cell as a pulse-shape detector. The optimum output voltage is found to be relatively insensitive to target chamber geometry and maximises with a background gas pressure of approximately 10-2 kPa, independent of gas species or target material. Voltage-current characteristics for a Cu plasma suggest that the plasma cell behaves as a thermionic generator and a model has been developed which gives a reasonable account of the experimental results. Whilst high voltages (>100 V into 50 Omega ) can be produced using a modest TEA CO2 laser, the nonlinearity of response limits the usefulness of the plasma cell as a pulse-shape detector.

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