Laser-induced optogalvanic effects under prebreakdown conditions in neon

Kravis, S. P.; Haydon, S. C.

doi:10.1088/0022-3727/14/2/008

Cited by 20 publications

(5 citation statements)

References 31 publications

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“…The first studies of optogalvanic effects under pre-breakdown conditions were carried out in these laboratories (Kravis andHaydon 1981, Brunker andHaydon 1983) using pulsed laser-induced techniques. The observation of fine structure in the first 1OOfis of the signal immediately following the pulsed laser perturbation revealed information about both the photon and ion contributions to the secondary ionization processes.…”

Section: Introductionmentioning

confidence: 99%

The effects of multi-mode CW laser-induced perturbations of neon metastable states on optogalvanic phenomena in pre-breakdown discharges

Ernest¹,

Haydon²,

Wang³

1992

J. Phys. D: Appl. Phys.

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Optogalvanic effects have been induced in the pre-breakdown regime in neon by the use of a CW ring dye laser operating in the wavelength range 550-650 nm. Those effects that arise when the dye laser output is allowed to operate in the multi-mode configuration at a wavelength tuned to a particular neon transition from one of the four 1s to one of the ten 2p energy levels have been investigated. The strong influence of the energetic metastable 1s5 particle has been examined in detail by inducing its transition to the 2p4 level with laser radiation tuned to 594.5 nm. The effect of collisional coupling between the closely spaced 1s levels complicates the interpretation of the observed temporal and spatial changes in the nanoampere pre-breakdown ionization currents following the laser-induced perturbation. The relevant coupled differential equations, relating the particle densities appropriate to the levels of the 1s manifold and the 2p4 state, have been solved. These solutions, in conjunction with an extension of the Molnar treatment for the temporal growth of ionization in the presence of two or more metastable particles, have led to determinations of the diffusion coefficients, the fundamental time constants associated with the diffusion processes, the corresponding quenching parameters linked to the effects of trace impurities, as well as the specific action of the laser radiation. Observations of the variation of the fundamental time constant with laser intensity agree well with theoretical predictions but lead to some unexpected consequences concerning the identity of the unperturbed residue.

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Section: Introductionmentioning

confidence: 99%

The effects of multi-mode CW laser-induced perturbations of neon metastable states on optogalvanic phenomena in pre-breakdown discharges

Ernest¹,

Haydon²,

Wang³

1992

J. Phys. D: Appl. Phys.

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“…12. Although the optogalvanic effect has been observed both in the Townsend region (Kravis & Haydon (1981)) and in the arc region the most interesting and relevant studies have been carried out in the normal glow discharge. This is in part due to the fact that the geometry of a discharge in the glow regime is well established and can be understood based on simple atomic collision models.…”

Section: The Optogalvanic Effect (Oge)mentioning

confidence: 99%

Lasers in Atomic Collisions, Cold Plasma and Cold Atom Physics

Cabrera‐Trujillo¹,

Jiménez-Mier²,

Juarez³

2011

Femtosecond-Scale Optics

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“…(3) changes in photoelectric effect; and (4) changes in electron production [9]. Positive ions of neon, produced mainly by collisional ionization of excited neon atoms, may drift towards the cathode under the influence of the discharge electric field.…”

Section: Physica Scripta 2mentioning

confidence: 99%

Optogalvanic Studies of a Neon Glow Discharge in Magnetic Fields: Ion Mobility Measurements and Detection of Atomic Alignment

Pendrill¹,

Pettersson²,

Österberg³

1983

Phys. Scr.

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Studies have been made of optogalvanic signals when a glow discharge of neon, irradiated with light from a highly monochromatic dye laser, is subject to externally applied magnetic fields. The slow response of the discharge to an abrupt change in laser intensity is affected by varying magnetic field and discharge voltage in a way to suggest that positive Ne ions play an important role in the production of optogalvanic signals. A novel sub-Doppler spectral profile is observed, and an interpretation based on a discussion of the time-dependence of the optogalvanic signal as a sensitive monitor of ionic velocities is presented. This effect is also a function of the atomic alignment.

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Laser-induced optogalvanic effects under prebreakdown conditions in neon

Cited by 20 publications

References 31 publications

The effects of multi-mode CW laser-induced perturbations of neon metastable states on optogalvanic phenomena in pre-breakdown discharges

The effects of multi-mode CW laser-induced perturbations of neon metastable states on optogalvanic phenomena in pre-breakdown discharges

Lasers in Atomic Collisions, Cold Plasma and Cold Atom Physics

Optogalvanic Studies of a Neon Glow Discharge in Magnetic Fields: Ion Mobility Measurements and Detection of Atomic Alignment

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