Radiation temperature characterization of a long duration x-ray source for a laboratory photoionized plasma experiment at OMEGA EP
Abstract
Long duration, i.e. tens of ns, broadband x-ray sources are important for laboratory photoionized plasma experiments relevant to astrophysics. In a series of experiments performed at the OMEGA EP laser facility, we have used the Gatling-Gun source to produce an x-ray drive that lasts for 30ns with a radiation temperature Tr =90eV. The Gatling-Gun source is comprised of three Cu hohlraums; each is filled with TPX foam and driven by a 10ns- square pulsed laser beam with 4.4kJ of UV laser energy1. The total source duration of 30ns is achieved by driving the three hohlraums sequentially in time, i.e. back-to-back. The radiation temperature was monitored with a VISAR diagnostic to check performance and compare with previous miniDMAX data1. We present measurements of the radiation temperature obtained from VISAR data from two series of experiments performed at OMEGA EP, in conjunction with radiation-hydrodynamics simulations of the VISAR package.
1D. Martinez, 2017 Annual OLUG Workshop. This work was sponsored in part by DOE NNSA NLUF Grant DE-NA0003533.- Publication:
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American Astronomical Society Meeting Abstracts #234
- Pub Date:
- June 2019
- Bibcode:
- 2019AAS...23420509S