Study on Pseudospark Switch Triggered by 532-nm Focused Laser

Sun, Guo Hua; Wang, Xia; Ding, Weidong; Yan, Jiaqi; Shen, Saikang; Nie, Shaohao

doi:10.1109/ted.2022.3229279

Cited by 4 publications

(1 citation statement)

References 27 publications

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“…The TOF profiles of electrons and ions is measured by a Faraday cup [24], which is made of brass with a diameter of 60 mm, and the distance d from the target is 19 mm. A high pass filtering circuit (C 1 and R s ) is constructed to measure electrons/ions current while a bias voltage is applied on the collecting electrode.…”

Section: Methodsmentioning

confidence: 99%

Electron and ion emission characteristics of metal irradiated by nanosecond laser

Sun,

Nie,

Wang

et al. 2024

J. Phys. D: Appl. Phys.

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Clarifying the electron and ion emission characteristics of metals irradiated by nanosecond focused laser in low pressure environment is crucial for improving applications based on laser-produced plasmas (LPPs). This paper investigates the emission characteristics through electrical and optical diagnosis. The emission process is investigated through joint analysis of electrons and ions behavior, and relevant influencing factors are studied. The emission process of electrons and ions is divided into four stages, characterized by the arrival of prompt electrons e1, ultrafast electrons e2/ions i1, fast ions i2 and thermal electrons e3/ions i3, respectively. e1 is mainly related to thermal emission and photoemission, which can be improved by high electric field, gas pressure (within a certain range), laser energy and melting boiling points of target. e2/e3 and i1/i2/i3 mainly originate from laser ablation, and their expansion process follows obvious bipolar diffusion characteristics, while the latter is related to the different mass and charge states of the ions. The amplitude of i2 and e3 can be improved by using low density and melting point metals, and they are easily blocked by background gas, almost independent of the weak electric field.

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Section: Methodsmentioning

confidence: 99%

Electron and ion emission characteristics of metal irradiated by nanosecond laser

Sun,

Nie,

Wang

et al. 2024

J. Phys. D: Appl. Phys.

Self Cite

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show abstract

Analysis of the trigger characteristics for a pseudospark switch triggered by nanosecond focused laser

Sun,

Wang,

Nie

et al. 2024

Vacuum

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A repetitive frequency square wave generator based on Blumlein pulse forming network and pseudospark switch

Yuan,

Liu,

Sun

et al. 2024

Review of Scientific Instruments

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The Blumlein pulse forming network (PFN) has widely been used in pulsed power technology to generate square waves with short pulse widths. In this paper, we developed a repetitive frequency square wave generator based on Blumlein PFN and pseudospark switch (PSS). A Blumlein PFN with unequal capacitances has been proposed, and the PFN parameters have been optimized for better output waveforms. A single-gap PSS with a withstand voltage of 40 kV and a repetitive frequency of 100 Hz has been designed to switch the Blumlein PFN. The experiment results show that the square wave generator can output pulses with a voltage of 26 kV, a rise time of 25 ns, and a pulse width of 90 ns on a matched load of 11 Ω. It has operated steadily for 10 h with a repetitive frequency of 100 Hz, and the jitter remains at around 1 ns after 1.05 × 106 shots.

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Study on Pseudospark Switch Triggered by 532-nm Focused Laser

Cited by 4 publications

References 27 publications

Electron and ion emission characteristics of metal irradiated by nanosecond laser

Electron and ion emission characteristics of metal irradiated by nanosecond laser

Analysis of the trigger characteristics for a pseudospark switch triggered by nanosecond focused laser

A repetitive frequency square wave generator based on Blumlein pulse forming network and pseudospark switch

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