Measurement and Analysis of Electromagnetic Pulse from Laser-Target Interaction at ShenGuang II Laser Facility

Yang, Jing-Kang; Li, T. S.; Yi, Tao; Wang, C. K.; Yang, Minghao; Yang, Weiming; Liu, S. Y.; Jiang, Shaoen; Ding, Yongkun

doi:10.1080/15361055.2016.1273690

Cited by 12 publications

(5 citation statements)

References 20 publications

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“…4 in ref. 24 have demonstrated extremely high electrical field strengths of the EMP's under comparable laser pulse intensities [25][26][27] : up to 100's of kV/m peak to peak while return currents through the target holder can achieve amplitudes of 10's of kA. Moreover, A. Poye et al 4 identified three different interaction regimes which rules the discharge mechanism, i.e.…”

Section: Resultsmentioning

confidence: 99%

Characterisation and Modelling of Ultrashort Laser-Driven Electromagnetic Pulses

Nelissen

Liszi

Marco

et al. 2020

Sci Rep

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Recent advances on laser technology have enabled the generation of ultrashort (fs) high power (pW) laser systems. for such large scale laser facilities there is an imperative demand for high repetition rate operation in symbiosis with beamlines or end-stations. in such extreme conditions the generation of electromagnetic pulses (eMp) during high intense laser target interaction experiments can tip the scale for the good outcome of the campaign. The EMP effects are several including interference with diagnostic devices and actuators as well as damage of electrical components. the eMp issue is quite known in the picosecond (ps) pulse laser experiments but no systematic study on eMp issues at multi-Joule fs-class lasers has been conducted thus far. In this paper we report the first experimental campaign for EMP-measurements performed at the 200 TW laser system (VEGA 2) at CLPU laser center. eMp pulse energy has been measured as a function of the laser intensity and energy together with other relevant quantities such as (i) the charge of the laser-driven protons and their maximum energy, as well as (ii) the X-ray K α emission coming from electron interaction inside the target. Analysis of experimental results demonstrate (and confirm) a direct correlation between the measured EMP pulse energy and the laser parameters such as laser intensity and laser energy in the ultrashort pulse duration regime. numerical feM (finite element Method) simulations of the eMp generated by the target holder system have been performed and the simulations results are shown to be in good agreement with the experimental ones.

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Section: Resultsmentioning

confidence: 99%

Characterisation and Modelling of Ultrashort Laser-Driven Electromagnetic Pulses

Nelissen

Liszi

Marco

et al. 2020

Sci Rep

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“…The experimental scheme is shown in figure 2, of which the air chamber is taken in the target chamber through the diagnostic loading platform (DIM). The ultra-small high-frequency toroidal magnetic field antennas (B-dot) are used to measure the EMP signals, with the equivalent area of 25π mm 2 , the diameter of 10 mm, the height of 11 mm, and the center frequency of 1.2 GHz for B-dot [22]. An oscilloscope (Tektronix DSA71254B/12.5GHz/50GS/s) is linked to the antennas via vacuum SAM joints and coaxial cables (length=10 m, model SUJ-50-3-2) to reduce some EMI, which also acted as a low-pass filters.…”

Section: Methodsmentioning

confidence: 99%

Effective electromagnetic shielding with multi-layer structure material on Shenguang laser facility

Zhao

Xia

et al. 2019

Plasma Sci. Technol.

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Electromagnetic pulses (EMPs) with high intensity and frequency bandwidth can be generated during the intensive laser irradiating solid targets in inertial confinement fusion (ICF). To shield the EMPs radiation and hence protect various diagnostics in and outside the target chamber, we designed a multi-layer structure material to shield the EMPs and demonstrate experimentally and numerically shielding performance of the material structure. The thickness of the multi-layer structure material has a great influence on the EMPs shielding. It is shown that, with the increase of the material thickness, the better shielding performance is obtained, and the material structure with polytetrafluoroethylene of 0.5 mm, copper of 0.4 mm and lead of 2.4 mm reduces 448 times compared the maximum value of EMPs voltage to that without shielded. The design of multilayer structure material for EMPs shielding provides a promising way to reduce EMPs radiation, which is extremely useful for the diagnostics protection and signal processing in ICF.

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“…The SG-II target chamber is a steel spherical chamber with a radius of 0.8 m. The SG-II laser has eight beams that deliver nanosecond pulses (North: N1, N2, N3, N4; South: S1, S2, S3, and S4) [24]. SG-II laser (1.8 kJ, 1 ns, λ=351 nm) was focused on the CD plane target with a thickness of 10 μm.…”

Section: Experimental Arrangementsmentioning

confidence: 99%

Spatial and temporal evolution of electromagnetic pulses generated at Shenguang-II series laser facilities

He¹,

Kang²,

Ren³

et al. 2021

Plasma Sci. Technol.

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The distribution and sources of EMPs produced at Shenguang-II (SG-II) series laser facilities are systematically investigated. The results indicate that the EMP amplitudes in the SG-II ps PW laser are very strong, one order higher than those from the SG-II laser facility. EMPs outside the target chamber decrease exponentially with the distance from the measuring points to the target chamber center at the two laser facilities. Moreover, EMPs can be remarkably reduced when the picosecond laser together with the nanosecond laser is incident to targets compared to the SG-II ps PW laser alone. The resulting conclusions are expected to offer experimental supports for further effective EMPs shielding design and achievement in high-power laser facilities.

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Measurement and Analysis of Electromagnetic Pulse from Laser-Target Interaction at ShenGuang II Laser Facility

Cited by 12 publications

References 20 publications

Characterisation and Modelling of Ultrashort Laser-Driven Electromagnetic Pulses

Characterisation and Modelling of Ultrashort Laser-Driven Electromagnetic Pulses

Effective electromagnetic shielding with multi-layer structure material on Shenguang laser facility

Spatial and temporal evolution of electromagnetic pulses generated at Shenguang-II series laser facilities

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