Laser-induced extreme magnetic field in nanorod targets

Abstract

The application of nano-structured target surfaces in laser-solid interaction has attracted significant attention in the last few years. Their ability to absorb significantly more laser energy promises a possible route for advancing the currently established laser ion acceleration concepts. However, it is crucial to have a better understanding of field evolution and electron dynamics during laser-matter interactions before the employment of such exotic targets. This paper focuses on the magnetic field generation in nano-forest targets consisting of parallel nanorods grown on plane surfaces. A general scaling law for the self-generated quasi-static magnetic field amplitude is given and it is shown that amplitudes up to 1 MT field are achievable with current technology. Analytical results are supported by three-dimensional particle-in-cell simulations. Non-parallel arrangements of nanorods has also been considered which result in the generation of donut-shaped azimuthal magnetic fields in a larger volume.

Generation of megatesla magnetic fields by intense-laser-driven microtube implosions

“…Laboratory generation of strong magnetic fields have been intensively studied [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], because such fields may realize new experimental tools for fundamen-tal studies and support diverse applications. Examples include plasma and beam physics [19][20][21][22][23][24], astro- [25,26] and solar-physics [27,28], atomic and molecular physics [29], and materials science [30,31].…”

Generation and collective interaction of giant magnetic dipoles in laser cluster plasma

“…Higher magnetic fields were achieved in Z-pinch experiments 5 and destructive devices 6 . Recently, owing to the development of high-power lasers, new Z-pinching methods have been investigated in nanowire array targets, which could provide even higher magnetic field amplitudes with micrometer scale lengths 7 , 8 . Big azimuthal magnetic fields are relatively easy to produce by intense laser pulses on a flat target surface 9 – 12 .…”

Generation of megatesla magnetic fields by intense-laser-driven microtube implosions

“…Laboratory generation of strong magnetic fields have been intensively studied [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] , because such fields may realize new experimental tools for fundamental studies and support diverse applications. Examples include plasma and beam physics [19][20][21][22][23][24] , astro- 25,26 and solar-physics 27,28 , atomic and molecular physics 29 , and materials science 30,31 .…”