NDLI: Influence of the lifetime of the laser-excited level and the laser pulse duration on the saturated LIF signal during the prebreakdown phases of a pseudospark discharge

Content Provider	IEEE Xplore Digital Library
Author	Arsov, V. Frank, K.
Copyright Year	1973
Abstract	Ground state copper vapor number density, sputtered from the cathode of an experimental pseudospark switch is measured using laser-induced fluorescence (LIF) from the copper transition 4/sup 2/P/sub 3/2/-4/sup 2/D/sub 5/2/ at 510.55 nm. Measurements are made in the hollow cathode at several axial positions in the time interval between the trigger pulse and the voltage breakdown. At voltage 1 kV, this interval, referred to as a prebreakdown phase, has a random and variable shot to shot duration, but discharges for which this duration is the same reveal similar properties and can be arranged in groups. The presented results are for prebreakdown duration of 1 /spl mu/s. The metal vapor density is determined from the LIF signal by using both its maximum and integral. This approach follows from a widely used LIF model, which is examined in detail to reveal a less familiar feature, namely the possibility to obtain an estimate of the lifetime of the laser-excited level, which has been considered perturbed by collisions during the discharge. A comparison between this estimate and the lifetime, obtained by the exponential decay of the LIF signal, reveals good agreement.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	1294
Ending Page	1306
Page Count	13
File Size	865103
File Format	PDF
ISSN	00933813
Volume Number	33
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical pulses Laser transitions Copper Cathodes Switches Pulse measurements Life estimation Lifetime estimation Stationary state Density measurement pseudospark laser-induced fluorescence optical saturation
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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Quantum efficiency measurements of photocathode candidates for back-lighted thyratrons

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Influence of the lifetime of the laser-excited level and the laser pulse duration on the saturated LIF signal during the prebreakdown phases of a pseudospark discharge

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