The Magnetic Recoil neutron Spectrometer (MRS) at the OMEGA laser facility has been routinely used to measure deuterium-tritium (DT) yield and areal density in cryogenically layered implosions since 2008. Recently, operation of the OMEGA MRS in higher-resolution mode with a new smaller, thinner (4 cm, 57 m thick) CD conversion foil has also enabled inference of the apparent DT ion temperature ( ) from MRS data. MRS-inferred compares well with as measured using neutron time-of-flight spectrometers, which is important as it demonstrates good understanding of the very different systematics associated with the two independent measurements. The MRS resolution in this configuration, Δ = 0.91 MeV FWHM, is still higher than that required for a high-precision measurement. We show how fielding a smaller foil closer to the target chamber center and redesigning the MRS detector array could bring the resolution to Δ = 0.45 MeV, reducing the systematic uncertainty by more than a factor of 4.
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