The phase-2 particle x-ray temporal diagnostic for simultaneous measurement of multiple x-ray and nuclear emission histories from OMEGA implosions (invited)
Author(s)Kabadi, N; Adrian, P; Stoeckl, C; Sorce, A; Sio, HW; Bedzyk, M; Evans, T; Ivancic, S; Katz, J; Knauer, J; Pearcy, J; Weiner, D; Betti, R; Birkel, A; Cao, D; Johnson, M Gatu; Regan, SP; Petrasso, RD; Frenje, J; ... Show more Show less
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<jats:p> Electron-temperature (T<jats:sub> e</jats:sub>) measurements in implosions provide valuable diagnostic information, as T<jats:sub> e</jats:sub> is negligibly affected by residual flows and other non-thermal effects unlike ion-temperature inferred from a fusion product spectrum. In OMEGA cryogenic implosions, measurement of T<jats:sub> e</jats:sub>(t) can be used to investigate effects related to time-resolved hot-spot energy balance. The newly implemented phase-2 Particle X-ray Temporal Diagnostic (PXTD) utilizes four fast-rise (∼15 ps) scintillator-channels with distinct x-ray filtering. Titanium and stepped aluminum filtering were chosen to maximize detector sensitivity in the 10–20 keV range, as it has been shown that these x rays have similar density and temperature weighting to the emitted deuterium–tritium fusion neutrons (DTn) from OMEGA Cryo-DT implosions. High quality data have been collected from warm implosions at OMEGA. These data have been used to infer spatially integrated T<jats:sub> e</jats:sub>(t) with <10% uncertainty at peak emission. Nuclear and x-ray emission histories are measured with 10 ps relative timing uncertainty for x rays and DTn and 12 ps for x rays and deuterium-[Formula: see text] protons (D<jats:sup>3</jats:sup>Hep). A future upgrade to the system will enable spatially integrated T<jats:sub> e</jats:sub>(t) with 40 ps time-resolution from cryogenic DT implosions. </jats:p>
Review of Scientific Instruments
Kabadi, N, Adrian, P, Stoeckl, C, Sorce, A, Sio, HW et al. 2022. "The phase-2 particle x-ray temporal diagnostic for simultaneous measurement of multiple x-ray and nuclear emission histories from OMEGA implosions (invited)." Review of Scientific Instruments, 93 (10).
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