Observation of capillary discharge Ne-like Ar 46.9 nm laser with pre-pulse and main-pulse delay time in the domain of 2–130 μs

Jiang, Shan; Zhao, Yijun; Xie, Yong‐Rong; Xu, Miao; Cui, Huaiyu; Wu, Han; Liu, Yang; Xu, Qianfan; Wang, Qi

doi:10.1007/s00340-012-5190-7

Cited by 15 publications

(10 citation statements)

References 12 publications

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“…The results in this paper are consistent with Ref. [3]. Therefore, it can be seen that the delay time can influence the laser energy and the spatial distribution of the single-pass amplified 46.9 nm laser.…”

Section: Resultssupporting

confidence: 92%

“…In Ref. [3], it was found that the laser intensity reached the highest at about 12 μs and changed little after 40 μs. The results in this paper are consistent with Ref.…”

Section: Resultsmentioning

confidence: 99%

“…In 2012, our group carried out a corresponding study on the influence of the delay time on the output laser intensity in the range of 2-130 μs [3] . It was found that the laser intensity reached the maximum when the delay time was 12 μs, and the laser intensity changed slowly when the delay time was longer than 40 μs.…”

Section: Introductionmentioning

confidence: 99%

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Effect of delay time between pre-pulse and main pulse on single-pass and double-pass amplification of 46.9 nm laser

Zhao¹,

Zhao²,

Cui³

et al. 2023

中国光学快报

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In this paper, the influence of the delay time between the pre-pulse and the main pulse on the double-pass amplified 46.9 nm laser was studied for the first time, to the best of our knowledge, by using a high-precision polished SiC slice as a rear mirror. The temporal and spatial characteristics of the output laser were measured separately to investigate the effect of the delay time on the laser characteristics. The energy of the double-pass amplified laser was between 510 μJ and 890 μJ. In addition, a theoretical model of double-pass amplification was established to analyze the effect of the delay time on the double-pass amplified 46.9 nm laser.

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Section: Resultssupporting

confidence: 92%

“…In Ref. [3], it was found that the laser intensity reached the highest at about 12 μs and changed little after 40 μs. The results in this paper are consistent with Ref.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of delay time between pre-pulse and main pulse on single-pass and double-pass amplification of 46.9 nm laser

Zhao¹,

Zhao²,

Cui³

et al. 2023

中国光学快报

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“…The shape of the preliminary current pulse was chosen such as to reproduce typical experimental prepulse shapes (see, e.g. [17,18]).…”

Section: Model Descriptionmentioning

confidence: 99%

“…Preliminary ionization of buffer gas by a weaker current pulse with 20-40 A amplitude and a few microseconds duration was found to be crucial for stable and efficient EUV laser operation [1]. Detailed experimental investigations have also revealed that variation in prepulse parameters can greatly influence the laser emission intensity [15][16][17][18]. The influence was attributed to electrical circuit mismatching, resulting in a less efficient energy input, as well as to axial inhomogeneity in density of plasma exiting the capillary that can absorb part of the emitted radiation.…”

Section: Introductionmentioning

confidence: 99%

On the mechanisms of the influence of preliminary ionization on the plasma dynamics of nanosecond capillary discharges and the properties of discharge-based EUV lasers

Eliseev¹,

Samokhvalov²,

Zhao³

et al. 2021

J. Phys. D: Appl. Phys.

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In this paper, we present the results of numerical investigations into the influence of preionization on the properties of extreme ultraviolet (EUV) lasers based on nanosecond capillary discharges. Prior to application of the main current pulse, gas inside the capillary is usually preionized by a separate current pulse with longer duration and lower amplitude, which creates plasma with minimal density on the capillary axis and maximal at the capillary wall. Magnetohydrodynamic simulations were performed for a range of prepulse parameters that defined different degrees of inhomogeneity of this initial profile. It was found that the plasma density distribution at the start of the main current pulse affects the cylindrical shock wave that takes place during the compression stage of a capillary discharge: A lower degree of radial inhomogeneity results in a steeper front of the shock wave. It is further shown that a steeper wave front results in a more concave electron density profile moments before the shock wave collapses on the capillary axis, when the EUV laser pulse presumably takes place, which may lead to a decrease in the rate of refraction losses. The proposed interpretation of the obtained numerical results correlates well with the available experimental data on the dependence of EUV laser pulse intensity and duration on the preliminary pulse amplitude.

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Influence of the Inner Diameters of Capillary on the Z‐Pinch Plasma of the Capillary Discharge Soft x‐ray Laser

Jiang

Zhao

Cui

et al. 2015

Contrib. Plasma Phys.

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In this paper, the effects of inner diameters on the Z-pinch plasma of capillary discharge soft x-ray laser were investigated with the 3.2 mm and 4.0 mm inner diameter alumina capillaries. The intensities of the laser emitted from the 3.2 mm and 4.0 mm inner diameter alumina capillaries were measured under different initial pressures. To understand the underlying physics of the experimental measurements, the Z-pinch plasma simulations had been conducted with a one-dimensional cylindrical symmetry Lagrangian magneto-hydrodynamics (MHD) code. The parametric studies of Z-pinch plasma, such as the electron temperature, the electron density and the Ne-like Ar ion density, were performed with the MHD code. With the experimental and the simulated results, the discussions had been conducted on the Z-pinch plasma of Ne-like Ar 46.9 nm laser with the 3.2 mm and 4.0 mm inner diameter alumina capillaries. The analysis had been made on the difference of the gain coefficients under the optimum pressures with both capillaries. Then, the effects of inner diameters on the optimum pressure and the pressure domain were analyzed.

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Observation of capillary discharge Ne-like Ar 46.9 nm laser with pre-pulse and main-pulse delay time in the domain of 2–130 μs

Cited by 15 publications

References 12 publications

Effect of delay time between pre-pulse and main pulse on single-pass and double-pass amplification of 46.9 nm laser

Effect of delay time between pre-pulse and main pulse on single-pass and double-pass amplification of 46.9 nm laser

On the mechanisms of the influence of preliminary ionization on the plasma dynamics of nanosecond capillary discharges and the properties of discharge-based EUV lasers

Influence of the Inner Diameters of Capillary on the Z‐Pinch Plasma of the Capillary Discharge Soft x‐ray Laser

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