Electromagnetic pulse emission from target holders during short-pulse laser interactions

Damien F.G. Minenna, Alexandre Poyé*, Philip Bradford, Nigel Woolsey, Vladimir T. Tikhonchuk

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


For the first time, a global model of electromagnetic pulse (EMP) emission connects charge separation in the laser target to quantitative measurements of the electromagnetic field. We present a frequency-domain dipole antenna model which predicts the quantity of charge accumulated in a laser target as well as the EMP amplitude and frequency. The model is validated against measurements from several high-intensity laser facilities, providing insight into target physics and informing the design of next-generation ultra-intense laser facilities. EMP amplitude is proportional to the total charge accumulated on the target, but we demonstrate that it is not directly affected by target charging time (and therefore the laser pulse duration), provided the charging time is shorter than the antenna characteristic time. We propose two independent methods for estimating the charging time based on the laser pulse duration. We also investigate the impact of target holder geometry on EMPs using cylindrical, conical, and helical holders.

Original languageEnglish
Article number063102
JournalPhysics of Plasmas
Issue number6
Early online date9 Jun 2020
Publication statusE-pub ahead of print - 9 Jun 2020

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