An NToF Suite to Measure Ion Temperature at the Z-Facility
Abstract
Neutron time-of-flight diagnostic techniques have been employed for over 50 years of fusion experiments. In 2016 Munro documented the non-thermal contributions to the neutron fusion peak spectral variance leading to the result that a single sample along a single line-of-sight is insufficient to determine Tion in all but the most unlikely of conditions. This ambiguity is endemic to all systems of rapid fuel assemby due to incomplete conversion of directed kinetic energy into heat. Use of multiple lines-of-sight and measurements can reduce the ambiguity and uncertainty to a level sufficient to achieve a desired task. Presented is a strategy for a new nToF suite for the Z-facility at Sandia National Laboratory, in Albuqueque, NM. This new suite leverages technologies from the National Ignition Facility at Lawrence Livermore National Laboratory and deploys these in a geometric configuration that enables Tion measurement using either D2 or DT fusing plasmas. The strategy and logic for the design, along with estimates of precision will be presented.
This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract No. DE-AC52- 07NA27344. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525 LLNL-ABS-811751-DRAFT.- Publication:
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APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- 2020
- Bibcode:
- 2020APS..DPPG11006G