Soft x-ray emission results of cylindrical ion-driven hohlraum experiments at PBFA II
- Sandia National Labs., Albuquerque, NM (United States); and others
The authors performed a series of experiments at the Pulsed Power Fusion Accelerator 2 (PBFA 2) in May, 1994 and obtained record temperatures of up to 65 eV for an ion driven hohlraum. The nominal parameters of the radially-incident PBFA 2 ion beam were 9 MeV peak voltage on-target at a peak power of 1--1.5 TW/cm{sup 2} for 15 ns. The hohlraum was a 4 mm right-circular cylinder with a gold wall, a low-density CH foam, and a 1.5- or 3-mm diameter diagnostic aperture in the top. A number of diagnostics were used to measure properties of the thermal radiation from the target. The soft x-ray yield and spectrum from the target were measured with an array of XRD and PIN detectors. Two bolometers were used to estimate the total soft x-ray emission. A broadband energy-, 1-dimensional spatial-, and time-resolved diagnostic was used for observing hydrodynamic motion. Both time-integrated and time-resolved cameras were used for 2-D imaging of the source. In this paper they present comparisons of the x-ray emission between these soft x-ray diagnostics. Important conclusions to date are that the aperture used to view the target thermal emission does not close.
- Research Organization:
- Sandia National Laboratory
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 170182
- Report Number(s):
- CONF-950612--; ISBN 0-7803-2669-5
- Country of Publication:
- United States
- Language:
- English
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