Spectroscopic analysis of high electric field enhanced ionization in laser filaments in air for corona guiding

Wei, Yingxia; Liu, Yaoxiang; Wang, Zhihui; Chen, Na; Ju, Jian; Liu, Yonghong; Sun, Haiyi; Wang, Cheng; Liu, Jiansheng; Lu, Huadong; Chin, See Leang; Li, Ruxin

doi:10.1017/hpl.2016.7

Cited by 13 publications

(6 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4(d)). The streamer type of corona discharges were also observed not only along the tip of the electrode but also on both ends of the laser filament [24,25]. And the positions where the laser guided streamer coronas were stationary at fixed positions (Fig.…”

Section: Length Characterization Of Plasma Filamentmentioning

confidence: 90%

“…2(b)) although it still could be barely seen. When a high voltage of 50 kV was applied on the electrode, the phenomenon of laser guided corona discharge was observed [24,25] as shown in Fig. 2(c).…”

Section: Methodsmentioning

confidence: 98%

“…These invisible low density plasma regions were revealed through filament guided streamer coronas under a high electric field. This is due to the enhanced ionization of the low density plasma created by laser pulses from the interaction of laser filament and high electric field [24,25]. It provides a more precise approach to characterize the plasma length of a laser filament.…”

Section: Length Characterization Of Plasma Filamentmentioning

confidence: 99%

“…This technique is based on the conductivity of the plasma. Inside the plasma there are free electrons and ions which interact with the external electrical field leading to enhanced ionization [24,25]. As a consequence an enhanced plasma emission in the visible region can be used to probe the weakly ionized plasmas.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Probing the effective length of plasma inside a filament

Liu¹,

Wang²,

Chen³

et al. 2017

Opt. Express

Self Cite

View full text Add to dashboard Cite

We present a novel method based on plasma-guided corona discharges to probe the plasma density longitudinal distribution, which is particularly good for the weakly ionized plasmas (~10 cm). With this method, plasma density longitudinal distribution inside both a weakly ionized plasma and a filament were characterized. When a high voltage electric field was applied onto a plasma channel, the original ionization created by a laser pulse would be enhanced and streamer coronas formed along the channel. By measuring the fluorescence of enhanced ionization, in particular, on both ends of a filament, the weak otherwise invisible plasma regions created by the laser pulse were identified. The observed plasma guided coronas were qualitatively understood by solving a 3D Maxwell equation through finite element analysis. The technique paves a new way to probe low density plasma and to precisely measure the effective length of plasma inside a filament.

show abstract

Section: Length Characterization Of Plasma Filamentmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 98%

Section: Length Characterization Of Plasma Filamentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Probing the effective length of plasma inside a filament

Liu¹,

Wang²,

Chen³

et al. 2017

Opt. Express

Self Cite

View full text Add to dashboard Cite

show abstract

“…When the laser beam is of femtosecond duration, many studies were done to determine the population inversion in the femtosecond plasma and the lasing action [14], [15]. The visible blue radiation recorded by 390-, 420-, and 430-nm filters shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen Laser Emissions of Short and Long Durations Generated in Air

Kekez

Villeneuve

2020

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

This article describes two sets of experiments. An eight-stage, pulse-forming network (PFN) Marx generator of 50-internal impedance produces a "square"-shaped voltage waveform and induces multiphoton ionization, excitation of molecules and ions to generate laser pulses of long (<3 μs) and short (∼10 ns) durations in air, when the principal laser line of the N 2 laser at 337.1 nm was observed. The visible blue laser lines coming from the first negative band of N + 2 ions due to the B 2 + u →X 2 + g transition at 391.4 and 427.8 nm were studied. The wideband (300-800 nm) Schott BG 39 interference filter was also employed to examine whether some other lines participate in the emission being generated. The scaling law was derived describing the attenuation of the emission versus the distance for long-duration pulses (<3 μs) at 337.1 nm. The second set of experiments was introduced to support the data obtained. It offers information pertinent to the visible blue line emissions as well as to the photoionization processes, lighting phenomena, and processes occurring at high altitudes.

show abstract

Femtosecond Laser Filamentation Induced Phenomena and Applications

Chin

2020

Topics in Applied Physics

View full text Add to dashboard Cite

Spectroscopic analysis of high electric field enhanced ionization in laser filaments in air for corona guiding

Cited by 13 publications

References 35 publications

Probing the effective length of plasma inside a filament

Probing the effective length of plasma inside a filament

Nitrogen Laser Emissions of Short and Long Durations Generated in Air

Femtosecond Laser Filamentation Induced Phenomena and Applications

Contact Info

Product

Resources

About