title: Measuring 20-100 T B-fields using Zeeman splitting of sodium emission lines on a 500 kA pulsed power machine.
abstract: We have shown that Zeeman splitting of the sodium (Na) D-lines at 5890 and 5896 Å can be used to measure the magnetic field (B-field) produced in high current pulsed power experiments. We have measured the B-field next to a return current conductor in a hybrid X-pinch experiment near a peak current of about 500 kA. Na is deposited on the conductor and then is desorbed and excited by radiation from the hybrid X-pinch. The D-line emission spectrum implies B-fields of about 20 T with a return current post of 4 mm diameter or up to 120 T with a return current wire of 0.455 mm diameter. These measurements were consistent or lower than the expected B-field, thereby showing that basic Zeeman splitting can be used to measure the B-field in a pulsed-power-driven high-energy-density (HED) plasma experiment. We hope to extend these measurement techniques using suitable ionized species to measurements within HED plasmas.
authors.affiliation: Cornell University, Ithaca, New York 14850, USA.
authors.forename: J T
authors.initials: JT
authors.lastname: Banasek
authors.affiliation: Cornell University, Ithaca, New York 14850, USA.
authors.forename: J T
authors.initials: JT
authors.lastname: Engelbrecht
authors.affiliation: Cornell University, Ithaca, New York 14850, USA.
authors.forename: S A
authors.initials: SA
authors.lastname: Pikuz
authors.affiliation: Cornell University, Ithaca, New York 14850, USA.
authors.forename: T A
authors.initials: TA
authors.lastname: Shelkovenko
authors.affiliation: Cornell University, Ithaca, New York 14850, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: Hammer