Observation of Zeeman splitting effect in a laser-driven coil

Abstract

The Zeeman splitting effect is observed in a strong magnetic field generated by a laser-driven coil. The expanding plasma from the coil wire surface is concentrated at the coil center and interacts with the simultaneously generated magnetic field. The Cu I spectral lines at wavelengths of 510.5541, 515.3235, and 521.8202 nm are detected and analyzed. The splittings of spectral lines are used to estimate the magnetic field strength at the coil center as ∼31.4 ± 15.7 T at a laser intensity of ∼5.6 × 1015 W/cm2, which agrees well with measurements using a B-dot probe. Some other plasma parameters of the central plasma disk are also studied. The temperature is evaluated from the Cu I spectral line intensity ratio, while the electron density is estimated from the Stark broadening effect.

Synergy enhancement and signal uncertainty of magnetic-spatial confinement in fiber-optic laser-induced breakdown spectroscopy

“…Some have also observed Zeeman splitting under a permanent magnetic eld 11 and the magnetic eld of the laser-driven coils. 12 Spatial connement was considered to compress the plasma by shock wave reected from the cavity and was considered to be an effective spectral enhancement means to enhance the plasma emission and improve the accuracy of quantitative analysis in LIBS. 13,14 Magnetic and spatial connement was combined and found to have enhancement factors of about 22 and 24 in Co and Cr lines, acquired in the form of magnets outside the aluminum hemispherical cavity and KrF excimer laser.…”