Seedless magnetic field generation via ultraintense laser irradiation of an aluminum tetrafoil

Magnetic field generation and amplification techniques are widely used due to their applications in various fields, including laboratory astrophysics and inertial confinement fusion. Microtube Implosion (MTI) is a scheme that amplifies a seed magnetic field by several orders of magnitude through the ultraintense irradiation of solid targets with a laser. In this study, we conducted 2D EPOCH simulations to investigate the ability of a tetrafoil (TF) target to generate a magnetic field in the absence of a seed magnetic field. The results show that the TF target generates magnetic field intensities comparable to a hollow cylindrical aluminum target undergoing MTI with a 10 kT seed. Furthermore, the configuration of the TF can be used to control the direction of the magnetic fields produced. The combined TF and microtube target sustained a higher magnetic field and flux compared to both the microtube and TF targets, without the need for a seed magnetic field.