Detailed spectral simulations in support of PBFA-Z dynamic hohlraum Z-pinch experiments
- Univ. of Wisconsin, Madison, WI (United States)
- Sandia National Labs., Albuquerque, NM (United States)
- Los Alamos National Lab., NM (United States)
In PBFA-Z dynamic hohlraum Z-pinch experiments, 16--18 MA of current is delivered to a load comprises of a tungsten wire array surrounding a low-density cylindrical CH foam. The magnetic field accelerates the W plasma radially inward at velocities {approximately} 40--60 cm/{micro}s. The W plasma impacts into the foam, generating a high T{sub R} radiation field which diffuses into the foam. The authors are investigating several types of spectral diagnostics which can be used to characterize the time-dependent conditions in the foam. In addition, they are examining the potential ramifications of axial jetting on the interpretation of axial x-ray diagnostics. In the analysis, results from 2-D radiation-magnetohydrodynamics simulations are post-processed using a hybrid spectral analysis code in which low-Z material is treated using a detailed collisional-radiative atomic model, while high-Z material is modeled using LTE UTA (unresolved transition array) opacities. They will present results from recent simulations and discuss ramifications for x-ray diagnostics.
- OSTI ID:
- 323586
- Report Number(s):
- CONF-970559-; TRN: 99:004304
- Resource Relation:
- Conference: 24. IEEE international conference on plasma science, San Diego, CA (United States), 19-23 May 1997; Other Information: PBD: 1997; Related Information: Is Part Of IEEE conference record -- Abstracts; PB: 354 p.
- Country of Publication:
- United States
- Language:
- English
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