Microcavity implosions to generate extreme electric fields and ultrahigh magnetic fields


  • Masakatsu Murakami ⋅ JP Institute of Laser Engineering, Osaka University, Japan


Microcavity implosions driven by multiple ultraintense laser pulses enable new regimes of strong electric and magnetic field generation. Laser irradiation of a target with an embedded micron-scale void generates a population of hot electrons which fill the void, driving implosion of the cavity. When the implosion is symmetric, the collapse of the ions to the target center is accompanied by the generation of a strong electric field. In the case of spherical microbubbles, the resulting electric field is predicted to reach the extreme values needed to observe high-field phenomenon such as vacuum polarization. Cylindrical microtube implosions, while less favorable for electric field production, generate strong axially-oriented magnetic fields, and can additionally amplifying applied fields, offering a path towards megatesla magnetic fields. The development of microcavity implosion platforms would introduce new capabilities in extreme electric field and ultrahigh magnetic field generation for both high-field physics and magnetized high energy density plasma experiments.

About the Speaker

Masakatsu Murakami, Institute of Laser Engineering, Osaka University, Japan

Masakatsu Murakami defended his Doctoral thesis "Theoretical study on coupling efficiency in inertial confinement fusion" in 1987. After he got his PhD degree, he worked for two and half years at the Max Planck Institute for Quantum Optics (MPQ) in Germany, where he studied laser-matter interaction and heavy ion fusion physics with Prof. J. Meyer-ter-Vehn. Coming back to Japan in 1990, he worked on Laser Isotope Separation for two years at the Institute of Laser Technology, which is headed by C. Yamanaka (former director of ILE, Osaka University).
Prof. Murakami is now leading a theoretical group at Institute of Laser Engineering, Osaka University. The scope of current scientific interests concerns laser interaction with matter, high temperature plasma, ion acceleration, hydrodynamic phenomena in astrophysics and inertial confinement fusion.



Article ID



Invited Presentations



How to Cite

M Murakami, Microcavity implosions to generate extreme electric fields and ultrahigh magnetic fields, Proceedings of the Samahang Pisika ng Pilipinas 42, SPP-2024-INV-2F-02 (2024). URL: https://proceedings.spp-online.org/article/view/SPP-2024-INV-2F-02.