Simulating the radiation environment in Z experiments using a 3D view factor code with 1D radiation-hydrodynamics emission modeling
We present an approach for simulating the multidimensional radiation environment in Z-pinch hohlraums at the Sandia Z facility. In this approach we use a three-dimensional (3D) view factor code to compute the incident flux distribution onto all surface elements of the view factor grid. At each surface element, the frequency-dependent re-emission is computed by performing a one-dimensional (1D) radiation-hydrodynamics simulation for the element. The pinch radiation source is treated as a uniformly emitting cylinder, with a size and emission flux given by the experimentally measured time-dependent radius and radiation power. Here, we describe our modeling procedure, and present results from simulations of Z experiments in which a plastic-tamped aluminum foil was located in an open slot in the Z-pinch hohlraum (i.e., the return current structure). We also discuss the sensitivity of the Al plasma conditions to the incident spectrum onto the sample and the re-emission characteristics of the hohlraum walls.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204812
- Journal Information:
- Review of Scientific Instruments, Vol. 72, Issue 1; Other Information: Othernumber: RSINAK000072000001001228000001; 725101CON; PBD: Jan 2001; ISSN 0034-6748
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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