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>
Date issued
2022-10-01Department
Massachusetts Institute of Technology. Plasma Science and Fusion CenterJournal
Review of Scientific Instruments
Publisher
AIP Publishing
Citation
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).
Version: Final published version