Roger Alan Vesey

TL;DR: In this article , results of recent simulations of argon double-shell gas-puff Z-pinch implosions performed at NRL using MACH2-TCRE code in the efficient and inefficient regime are presented.

TL;DR: In this article , the effect of time-dependent kinetics using the NRL DZAPP code was explored and compared with experiments using steady-state and timedependent level kinetics.

Abstract: Summary form only given. Radiation environments characteristic of those encountered during the low-temperature foot pulse and subsequent higher-temperature early-step pulses required for indirect-drive ICF ignition on the National Ignition Facility (NIF) are desired in order to provide a platform to better understand the dynamics of NIF hohlraums and capsules prior to NIF completion. In this paper, we show that an axial hohlraum using the static-wall-hohlraum geometry heated by X-rays from a Z-pinch on the Z generator is capable of providing environments for such pre-NIF studies as well as for diagnostic applications.

TL;DR: In this paper , the authors derived a general formula for modeling the absolute response of non-focusing x-ray diagnostics, such as X-ray imagers, one-dimensional space-resolved spectrometers, and xray power diagnostics.

TL;DR: In this paper, an axial hohlraum using the static-wall-hohlrauma geometry heated by X-rays from a Z-pinch on the Z generator is demonstrated to provide environments for such pre-NIF studies as well as for diagnostic applications.