Zeeman Polarization Spectroscopy on Gas Puff Z-Pinches

Zeeman Polarization Spectroscopy on 1 MA gas-puff z-pinches in CO2 and CO2 doped neon is being used to determine the magnetic field distribution in the

plasma during implosion. Light is collected parallel to the azimuthal

magnetic field tangential to the gas puff implosion sheath. The light is

split into left and right hand circularly polarized components and then

focused into two linear fiber bundles and delivered to a 750 mm

spectrometer. By assuming cylindrical symmetry and from the sharp thermal gradiant localized Zeeman measurements are made. The peak wavelengths of the two polarizations can be resolved in our 1 MA experiments, and the magnetic field determined from their separation, despite Stark Broadening. Introducing dopants into the gas

puff allows the use of additional emission lines, such as a Carbon IV or Oxygen VI doublet, to increase spatial resolution. This

method was developed for z-pinch experiments on a 500 kA, 500 ns rise time

generator [1] as part of the Cornell/NNSA pulsed power center.