Modelling of Capillary Discharge in Repetition Mode for Short Capillary Systems with Various Filling Methods
https://doi.org/10.23947/2587-8999-2024-8-2-45-59
Abstract
Introduction. Currently, frequency modes of operation of electron accelerators based on capillary discharges are actively investigated. Electrons in these systems are accelerated by femtosecond laser pulses passing through the discharge plasma.
Materials and Methods. The paper presents results of three-dimensional magnetohydrodynamic modelling of the capillary discharge cycle, including stages of filling a short capillary with working gas (hydrogen), formation of the plasma channel, and restoration of the working medium before the start of the next discharge. Calculations were performed assuming the system is under external cooling, which maintains thermal balance at intermediate stages of the working cycle, and under constant conditions of gas supply and evacuation.
Results. The computational experiments demonstrate the capability of generating beams of relativistic electrons with a repetition frequency of approximately one kilohertz.
Discussion and Conclusions. The obtained results allow us to speak about the prospects of using LWFA with a short channel length and a high repetition rate of the capillary discharge.
Keywords
Supporting agencies: The results were obtained using the equipment of the “Center for Collective Use” IAM RAS (ckp.kiam.ru). The authors are grateful to candidate of physical and mathematical sciences G.A. Bagdasarov for discussing the results of computational experiments.
About the Authors
V. A. Gasilov
Keldysh Institute of Applied Mathematics of Russian Academy of Sciences
Russian Federation
Russian Federation
Vladimir A. Gasilov, Principal Researcher
4, Miusskaya sq., Moscow, 125047
N. O. Savenko
Keldysh Institute of Applied Mathematics of Russian Academy of Sciences
Russian Federation
Russian Federation
Nikita O. Savenko, Junior Researcher
4, Miusskaya sq., Moscow, 125047
Yu. S. Sharova
Keldysh Institute of Applied Mathematics of Russian Academy of Sciences
Russian Federation
Russian Federation
Yulia S. Sharova, Junior Researcher
4, Miusskaya sq., Moscow, 125047
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Review
For citations:
Gasilov V.A., Savenko N.O., Sharova Yu.S. Modelling of Capillary Discharge in Repetition Mode for Short Capillary Systems with Various Filling Methods. Computational Mathematics and Information Technologies. 2024;8(2):45-59. https://doi.org/10.23947/2587-8999-2024-8-2-45-59
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