Electric-discharge laser initiated in the active medium

Pavlovskiĭ, A. I.; Bosamykin, V. S.; Karelin, V. I.; Nikol'skii, V. S.

doi:10.1070/qe1976v006n03abeh011013

Cited by 19 publications

(8 citation statements)

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“…The number of new channels increases with time, they disperse from the middle to the periphery of the gap, and their brightness gradually achieves that of the first Fig. 18 Schemes of experimental setups for studying the SIVD dynamics: (7) ignitor and (2) monitoring conductors. Apollonov: High-power self-controlled volume-discharge-based .…”

Section: Fig 12mentioning

confidence: 98%

High-power self-controlled volume-discharge-based molecular lasers

Аполлонов

2004

Opt. Eng

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An investigation is made of the characteristics of the formation of a self-controlled volume discharge for pumping CO 2 lasers, i.e., self-sustained volume discharge (SSVD), which involves the preliminary filling of a discharge gap by an electron flux from an auxiliary discharge plasma. It is determined that this method is suitable for large interelectrode gaps, that distortion of the electric field in the gap by the space charge of the electron flux plays an important role in the formation of the discharge, that the electrodes could be profiled dynamically during propagation of an electron flux through the discharge gap, and a SSVD could form in systems with a strongly inhomogeneous field. High-power SSVD-based CO 2 laser systems are created and investigated. Another type of self-controlled volume discharge without preionization, i.e., a selfinitiated volume discharge (SIVD), in nonchain HF lasers with SF 6 -C 2 H 6 mixtures is also investigated. It is established that, after the primary local electrical breakdown of the discharge gap, the SIVD spreads along the gap in directions perpendicular to that of the electric field by means of the successive formation of overlapping diffuse channels under a discharge voltage close to its quasi-steady-state value. As new channels appear, the current that flows through the channels formed earlier decreases. The volume occupied by the SIVD increases when the energy deposited in the plasma increases, and, when the discharge volume is confined by a dielectric surface, the discharge voltage increases simultaneously when the current increases. The possible mechanisms that explain the observed phenomena, namely the dissociation and electron attachment of SF 6 molecules, are examined. A simple analytical model is developed that makes it possible to describe these mechanisms at a qualitative level. High-power SIVD-based HF(DF) lasers are developed and tested.

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Section: Fig 12mentioning

confidence: 98%

High-power self-controlled volume-discharge-based molecular lasers

Аполлонов

2004

Opt. Eng

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“…Therefore, runaway electron beams registered in gas diodes have not found practical application. On the other hand, in [10][11][12][13][14][15] it was demonstrated that large dozes of soft x-ray radiation could be obtained in a nonuniform electric field in discharges in working mixes of CO 2 , exciplex lasers, and in air. The maximum energy of x-ray radiation was in the region of 5-20 keV, and the expose doze in the active volume was as great as 60-300 R [14].…”

Section: Introductionmentioning

confidence: 99%

“…3) For pulse edge duration of a few nanoseconds, only soft x-ray radiation with a maximum at energies of 5-10 keV is registered under gap breakdown conditions [10][11][12][13][14][15]. Moreover, the main source of soft x-ray radiation is the discharge plasma.…”

Section: Introductionmentioning

confidence: 99%

On the formation of nanosecond volume discharges, subnanosecond runaway electron beams, and x-ray radiation in gases at elevated pressure

Тарасенко

Kostyrya

2005

Russ Phys J

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“…Usually, preliminary ionization of a discharge gap by different sources of ionizing radiation [2] or decreasing pressure in a gas gap [3] are used to form a high-pressure volume pulse discharge. A pulse discharge in a non-uniform electric field is used for preionization of the main discharge in pulsed electrodischarge lasers (exciplex, CO2 and others [4,5]). The specific energy input in a volume discharge maybe essentially increased up to 100 MW/cm3 at nanosecond duration of a voltage pulse with a steep leading edge (unities -fractions of a nanosecond) [6,7].…”

Section: Introductionmentioning

confidence: 99%