Magnetic field measurements on the self Magnetic Pinch diode at SNL using zeeman splitting

Summary form only given. The RITS-6 accelerator at Sandia National Laboratories has been used to test the Self Magnetic Pinch (SMP) diode. The SMP diode is a flash x-ray radiography source with a radiation pulse length of 30-50 ns, dependent on the diode configuration. A hollow cathode emits electrons through an approximately 1 cm vacuum A-K gap onto a high Z material. The electron beam pinches from its own magnetic field as it traverses the gap1. Consequently, magnetic field measurements provide key insights into the diode physics. Presently, field profiles are predicted from LSP simulations, and direct local measurements would also help benchmark these codes.Visible spectra of the diode plasma have been taken along the anode surface using a lens coupled fiber arrays which is imaged onto a 0.3 m, high resolution spectrometer. Zeeman splitting measurements of C IV and Al III suggest magnetic fields of 3-4 T a few mm from the diode axis. These measurements yield current profiles near the target surface, and suggest that a significant fraction of the current density is outside the few mm spot region.