Development of a Buried Layer Platform at the OMEGA Laser to Study Open L-Shell Spectra from Coronal (non-LTE) Plasmas
ORAL
Abstract
A buried layer platform is being developed at the OMEGA laser to study the open L-shell spectra of coronal (non-‐LTE) plasmas (ne $\sim$ few 10$^{21 }$/cm$^3$, Te $\sim$0.8 –- 1.2 keV) of mid Z materials. Studies have been done using a 250 $\mu$m diameter dot composed of a layer of 1200 Å thick Zn between two 600 Å thick layers of Ti, in the center of a 1000 $\mu$m diameter, 13 $\mu$m thick beryllium tamper. Lasers heat the target from both sides for up to 3 ns. The size of the microdot vs time was measured with x-‐ray imaging (face-‐on and side--on). The radiant x-‐ray power was measured with a low-‐resolution absolutely calibrated x-‐ray spectrometer (DANTE). The temperature was measured from the Ti helium-‐beta complex. The use of this platform for the verification of atomic models is discussed.
*This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
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