X-ray Diagnostic Development for Electron Beam Driven WDM Experiments
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2018-06-24 |
| Authors | Nicholas Ramey, R. M. Gilgenbach, R. D. McBride, J. E. Coleman, Robert James Hohlfelder |
| Institutions | University of Michigan, Sandia National Laboratories |
Abstract
Section titled “Abstract”A platform for characterizing the equation-of-state of the warm dense matter (WDM) regime is being developed on an intense, relativistic electron accelerator <sup xmlns:mml=“http://www.w3.org/1998/Math/MathML” xmlns:xlink=“http://www.w3.org/1999/xlink”>1,2</sup> . DARHT Axis-I generates a 100-ns-long electron pulse with a beam current of 1.7 kA and energy of 19.8 MeV that deposits energy into a thin metal foil heating it to a warm dense plasma. The collisional ionization of the target by the electron beam produces an anisotropic angular distribution of K- and L-shell radiation, in addition to a continuum of both scattered electrons and Bremsstrahlung up to the beam energy of 19.8 MeV. A bolometer <sup xmlns:mml=“http://www.w3.org/1998/Math/MathML” xmlns:xlink=“http://www.w3.org/1999/xlink”>3</sup> and an array of diamond photo-conducting detectors will be calibrated on a 1-MA linear transformer driver at the University of Michigan <sup xmlns:mml=“http://www.w3.org/1998/Math/MathML” xmlns:xlink=“http://www.w3.org/1999/xlink”>4</sup> . These diagnostics will then be fielded on the Axis-I electron linac to characterize the background Bremsstrahlung and scattered electrons. Additionally, a gated X-ray imager is under development to acquire temporal and spatial measurements of X-rays. The goal of these diagnostics is to provide temperature and density measurements of the warm dense plasma for the first time with this heating technique.