Using Rayleigh scattering method to diagnose the airflow field of Z-pinch gas-puff load

Wang Liangping; Li Mo; Wang Sheng; Zhang Zhenrong

doi:10.11884/HPLPB202537.240341

Volume 37 Issue 4

Mar. 2025

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Article Navigation > High Power Laser and Particle Beams > 2025 > 37(4): 045007

Wang Liangping, Li Mo, Wang Sheng, et al. Using Rayleigh scattering method to diagnose the airflow field of Z-pinch gas-puff load[J]. High Power Laser and Particle Beams, 2025, 37: 045007. doi: 10.11884/HPLPB202537.240341

Citation:

Wang Liangping, Li Mo, Wang Sheng, et al. Using Rayleigh scattering method to diagnose the airflow field of Z-pinch gas-puff load[J]. High Power Laser and Particle Beams, 2025, 37: 045007. doi: 10.11884/HPLPB202537.240341

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Using Rayleigh scattering method to diagnose the airflow field of Z-pinch gas-puff load

doi: 10.11884/HPLPB202537.240341

National Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi’an 710024, China

Received Date: 2024-09-24
Accepted Date: 2025-03-28
Rev Recd Date: 2025-03-28

Available Online: 2025-04-01

Publish Date: 2025-04-15

Abstract

Abstract

The gas-puff load is widely used in the Z-pinch researches because of its simple installation and excellent performance. The initial distribution of the gas-flow mass of the puff load is the most important parameter for optimizing the nozzle size structure, improving the implosion dynamics process, and finally improving the X-ray radiation yield. In this paper, the feasibility of using Rayleigh scattering to diagnose the airflow field of a gas-puff is introduced. The time-resolved images of the airflow filed have been obtained. The images show that the gas flowing from the nozzle forms a hollow shell with lower density within the length 1 cm and the flow expands in radical direction like a horn. The experimental images are compared with the calculation results using the ballistic-gas-flow model, and it is found that the model can well illustrate the flow field if the parameters are selected properly. The density of the airflow deduced from the Rayleigh scattering images is 3−4 orders of magnitude higher than the calculated results by ballistic transport model. The reason is that clusters are formed when the airflow field is in low temperature and low density, and they can greatly increase the Rayleigh scattering effect of gas flow. Nevertheless, the relative intensity distribution of the gas flow field can be obtained by the Rayleigh scattering with distinct details.
- Z-pinch,
- gas-puff,
- Rayleigh scattering,
- airflow distribution

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References(23)

References

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