Coherent light scattering stimulated by a quasi-static electric field

Очкин, В. Н.; Tskhaǐ, S. N.

doi:10.1070/pu2003v046n11abeh001662

Cited by 6 publications

(5 citation statements)

References 20 publications

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“…More recently, a similar method was developed for electric field measurements and is thus often described as E-field CARS [127,128]. The E-field CARS process begins similarly as standard CARS where a pump and Stokes photon interact with the ground state molecules.…”

Section: E-field Carsmentioning

confidence: 99%

Electric field determination in transient plasmas: in situ & non-invasive methods

Goldberg

Hoder

Brandenburg

2022

Plasma Sources Sci. Technol.

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One of the primary basic plasma parameters within transient nonequilibrium plasmas is the reduced electric field strength, roughly understood as the ratio of the electrical energy given to the charged species between two collisions. While physical probes have historically been used for electric field measurements, recent advances in high intensity lasers and sensitive detection methods have allowed for non-invasive optical electric field determination in nearly any discharge configuration with time-resolution up to the sub-nanosecond range and sub-millimeter spatial resolution. This topical review serves to highlight several non-invasive methods for in-situ electric field strength determination in transient plasmas ranging from high vacuum environments to atmospheric pressure and above. We will discuss the advantages and proper implementation of (i) Laser induced fluorescence dip spectroscopy for measurements in low pressure RF discharges, (ii) optical emission spectroscopy based methods for nitrogen, helium or hydrogen containing discharges, (iii) electric field induced coherent Raman scattering, and (iv) electric field induced second harmonic generation. The physical mechanism for each method will be described as well as basic implementation and highlighting recent results.

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Section: E-field Carsmentioning

confidence: 99%

Electric field determination in transient plasmas: in situ & non-invasive methods

Goldberg

Hoder

Brandenburg

2022

Plasma Sources Sci. Technol.

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“…During the last few years, laser techniques for electric field measurements, such as four-wave mixing and electric field induced second harmonic generation, have become more and more popular. The four-wave mixing technique [42][43][44] uses a process similar to coherent anti-Stokes Raman scattering. Two laser beams with photon energies separated by the vibrational Raman shift of a gas molecule are focused in the discharge gap, when the external electric field is applied.…”

Section: Introductionmentioning

confidence: 99%

Electric field measurements in a He:N₂ nanosecond pulsed discharge with sub-ns time resolution

Lepikhin¹,

Luggenhölscher²,

Czarnetzki³

2020

J. Phys. D: Appl. Phys.

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The electric field in the He:N2 nanosecond atmospheric pressure plasma jet is studied using the electric-field induced second harmonic generation technique. It is shown that the calibration obtained with a DC voltage applied to the discharge cell may lead to incorrect results in the electric field measurements. It is proposed to use nanosecond high voltage pulses at low repetition rates for the calibration instead of a DC voltage. The temporal development of the electric field in the discharge at different distances from the cathode is measured with high temporal (100 ps) and spatial (50 µm) resolution. An electric field profile structure similar to the one in streamers or ionization fronts is observed. The velocity of the propagation of the falling edge of the ionization front is determined to be 0.85 × 106 m s−1. The validity of the local field approximation, important for modeling of these kind of discharges, is confirmed for the present conditions based on time and space derivatives of the measured electric field. The temporal evolution of the electron density is obtained by the measured electrical current and the time resolved electric field measurement combined with the electron mobility calculated with BOLSIG+.

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“…al. [4][5][6]. Since the signal scales with the product of the green and red laser intensities the temporal resolution is slightly better than the individual laser pulse widths.…”

mentioning

confidence: 99%

“…Simultaneous measurement of voltage and discharge current is performed by a high-voltage probe (Tektronix P6015A) and a current probe (Lecroy AP015) installed at the grounded electrode. The electric field in the centre of the discharge is measured by a laser spectroscopic technique similar to CARS [4][5][6]. It is based on recording the intensity of infrared (IR) radiation generated through anti-Stokes Raman scattering on the gas molecules in the investigated medium.…”

mentioning

confidence: 99%

Ignition of a nanosecond-pulsed near atmospheric pressure discharge in a narrow gap

Muller¹,

Luggenhölscher²,

Czarnetzki³

2011

J. Phys. D: Appl. Phys.

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Coherent light scattering stimulated by a quasi-static electric field

Cited by 6 publications

References 20 publications

Electric field determination in transient plasmas: in situ & non-invasive methods

Electric field determination in transient plasmas: in situ & non-invasive methods

Electric field measurements in a He:N₂ nanosecond pulsed discharge with sub-ns time resolution

Ignition of a nanosecond-pulsed near atmospheric pressure discharge in a narrow gap

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Coherent light scattering stimulated by a quasi-static electric field

Cited by 6 publications

References 20 publications

Electric field determination in transient plasmas: in situ & non-invasive methods

Electric field determination in transient plasmas: in situ & non-invasive methods

Electric field measurements in a He:N2 nanosecond pulsed discharge with sub-ns time resolution

Ignition of a nanosecond-pulsed near atmospheric pressure discharge in a narrow gap

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Electric field measurements in a He:N₂ nanosecond pulsed discharge with sub-ns time resolution