Four-channel TEA nitrogen laser for interferometric measurements on the plasma focus

Baltog, I.; Ganciu, M.; Mihut, L.; Zambreanu, V.

doi:10.1088/0022-3735/19/12/009

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…The PbI, samples were cleaved from single crystal ingots grown by the Bridgman method from chemically purified raw material. The results reported in this paper have been obtained on Ag+-doped samples at weight concentrations of c = 2 x lo-,, lo-,, and A time-resolved analysis of the luminescence was performed with a fast photomultiplier EM19819 and a boxcar averager, and a nitrogen laser (with 2ns pulse duration and 0.37 MW peak power) was used as excitation source (A = 337.1 nm) [6]. For studies a tunable dye laser was also used.…”

Section: Methodsmentioning

confidence: 99%

Luminescence and Photoconductivity Studies on Pbl2: Ag

Baltog

Calistru

Dimofte

et al. 1991

Phys. Stat. Sol. (a)

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New results are given concerning the luminescence of a Pb1,:Ag single crystal under band-to-band excitation. The luminescence decay studies reveal two main processes, namely fluorescence and phosphorescence which coexist in the 1.97 eV characteristic emission band for the doped crystal. The influence of gap localized levels involved in luminescence processes is revealed by photoconductivity measurements on pure and doped crystals. The experimental results point to the participation of photogenerated free carriers in the luminescence processes.On presente des nouveaux resultats concernant la luminescence des monocristaux de Pb1,:Ag excites par I'irradiation dans la bande fondamentale d'absorbtion. Les etudes sur l'extinction de la luminescence relevent deux processus principaux: de fluorescence et de phosphorescence, qui coexistent dans la bande characteristique d'emission (1,97 eV) pour le cristal dope. L'existence des niveaux localisis dans la bande interdite qui sont impliques dans le processus de luminescence, sont releves par des etudes de photoconduction. Les resultats exptrimentaux concluent la participation dans le processus de photoluminescence des electrons et trous libres.

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Section: Methodsmentioning

confidence: 99%

Luminescence and Photoconductivity Studies on Pbl2: Ag

Baltog

Calistru

Dimofte

et al. 1991

Phys. Stat. Sol. (a)

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“…A multichannel nitrogen laser system has been set. for interferometry and shadowgraphy diagnostics [14].…”

Section: Experimental Arrangement and Diagnosticsmentioning

confidence: 99%

Energetic and angular characteristics of the reacting deuterons in a plasma focus

Tiseanu¹,

Mandache²,

Zambreanu³

1994

Plasma Phys. Control. Fusion

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A model for the angular distribution of the neutron emission is derived and parametrized. This enables us to apply fitting procedures to the experimental data of the anisotropy of the neutron fluence, which fumish the mean energy and angular characteristics of the reacting deuterons. To this end the angular distributions of the neutron Ruence were measured with high accuracy, on every shot the relative statistical errors being below 3-4%. At the same time, based on direct measuremen& of axially emitted ion energy spectra, we found a realistic distribution function for the reacting deuterons and an analytical expression for the anisotropy of the neutron Ruence. The most important result provided by this method applied on a small energy plasma focus device is that medium-energy deuterons (50-100 keV) with a relatively broad angular distribution are responsible for most of the neutron yield.

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“…The second technique is to use a spark gap [2,4] or a thyratron [3] for each individual laser channel. A train of sequenced laser pulses is generated by different techniques of delayed triggering of the spark gaps or thyratrons.…”

Section: Generation Of Sequenced N Laser Pulsesmentioning

confidence: 99%

A four-channel TEA N₂laser controlled by a multistage spark gap

Tou¹,

Kwek²,

Chin³

1993

Meas. Sci. Technol.

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A four-channel nanosecond transversely excited atmospheric (TEA) N, laser controlled by a simple and cast effective multistage spark gap which offers a high flexibility in varying the time sequence of the laser pulses from over 100 n s to as low as 5 ns is described. The delays between these laser pulses depend mainly on two important spark gap breakdown parameters: the charging voltage and their respective gap separations. The jitters between these laser pulses are observed to be independent of the initial ignition of the multistage spark gap-hence a precision and very fast triggering technique that is usuallv crucial for such work can be dispensed with.

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Four-channel TEA nitrogen laser for interferometric measurements on the plasma focus

Cited by 7 publications

References 8 publications

Luminescence and Photoconductivity Studies on Pbl2: Ag

Luminescence and Photoconductivity Studies on Pbl2: Ag

Energetic and angular characteristics of the reacting deuterons in a plasma focus

A four-channel TEA N₂laser controlled by a multistage spark gap

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Four-channel TEA nitrogen laser for interferometric measurements on the plasma focus

Cited by 7 publications

References 8 publications

Luminescence and Photoconductivity Studies on Pbl2: Ag

Luminescence and Photoconductivity Studies on Pbl2: Ag

Energetic and angular characteristics of the reacting deuterons in a plasma focus

A four-channel TEA N2laser controlled by a multistage spark gap

Contact Info

Product

Resources

About

A four-channel TEA N₂laser controlled by a multistage spark gap