Ultra-fast single-crystal CVD diamonds in the particle time-of-flight (PTOF) detector for low yield burn-history measurements on the NIF (invited)

Reichelt, B. L.; Kishimori, R.; Lawrence, Y.; Wink, C. W.; Johnson, M. Gatu; Johnson, T. M.; Adrian, P. J.; Baker, K. L.; Casey, D. T.; Clark, D. S.; Dannhoff, S. G.; Eckart, M. J.; Evans, T. E.; Geppert-Kleinrath, H.; Gibson, D.; Hahn, K. D.; Higginson, D. P.; Izumi, N.; Kabadi, N. V.; Kerr, S.; Kunimune, J. H.; Landen, O. L.; Mariscal, E.; Marsh, R. A.; Martinez, D.; Meaney, K. D.; Pearcy, J. A.; Petrasso, R. D.; Rubery, M. S.; Rusby, D. R.; Russell, L.; Schlossberg, D. J.; Smalyuk, V. A.; Tommasini, R.; Frenje, J. A.; Li, C. K.

doi:10.1063/5.0219374

Ultra-fast single-crystal CVD diamonds in the particle time-of-flight (PTOF) detector for low yield burn-history measurements on the NIF (invited)

Journal Article · Sun Jan 05 23:00:00 EST 2025 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0219374· OSTI ID:2496722

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The Particle Time of Flight (PTOF) diagnostic is a chemical vapor deposition diamond-based detector and is the only diagnostic for measuring nuclear bang times of low yield (<1013) shots on the National Ignition Facility. Recently, a comprehensive study of detector impulse responses revealed certain detectors with very fast and consistent impulse responses with a rise time of <50 ps, enabling low yield burn history measurements. At the current standoff of 50 cm, this measurement is possible with fast 14 MeV neutrons from deuterium–tritium (DT) fusion plasmas. PTOF-inferred DT burn width numbers compare well with widths inferred from the gamma reaction history diagnostic on mid-yield (1013–1015) shots, where both systems are capable of making this measurement. These new capabilities could be extended to 2.5 MeV deuterium–deuterium neutrons from D plasmas and to even lower yield by reducing the detector standoff distance to 10 cm; a design for this is also presented.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: NONE; NA0003960; AC52-07NA27344

OSTI ID:: 2496722

Alternate ID(s):: OSTI ID: 2526330

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 96; ISSN 0034-6748

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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