http://arxiv.org/abs/1604.01259
Magnetic fields have a crucial role in physics at all scales, from synchrotrons and laser-driven plasma accelerators to astrophysics and nanotechnology. Large field strengths, beside the guiding of relativistic particles along a shorter curvature, allows the investigation of material in extreme conditions existing only in exotic astro-objects like neutron stars or pulsars. Here we propose a method for generating magnetic field on the GigaGauss level in under-dense plasma using high intensity laser pulses with azimuthally non-uniform intensity distribution. The interaction is studied with the help of three-dimensional particle-in-cell plasma simulation code. Beside the standard wake-field and bubble generation, such laser beam induces the rotational motion of electrons at the edge of evacuated plasma region. The combined axial magnetic and electric fields form a compact source of both high frequency radiation, due to coherent synchrotron emission, and low emittance, high density relativistic electron bunches. We will also discuss the regime at which static solenoidal field can be observed without electron acceleration with longer life-time but smaller magnetic field amplitude.
Z. Lecz, I. Konoplev, A. Seryi, et. al.
Wed, 6 Apr 16
40/63
Comments: 15 pages, 9 figures. 2 pictures (in Fig. 2) are not included because they exceed the total data size limit. I will send the full source by email. One file (supplement.pdf) is supplementary material