Ultra-fast single-crystal CVD diamonds in the particle time-of-flight (PTOF) detector for low yield burn-history measurements on the NIF (invited)
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2025-01-01 |
| Journal | Review of Scientific Instruments |
| Authors | B. L. Reichelt, R. Kishimori, Y. Lawrence, C. W. Wink, M. Gatu Johnson |
| Institutions | Applied Energetics (United States), Los Alamos National Laboratory |
| Citations | 1 |
Abstract
Section titled āAbstractāThe 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.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 1995 - 14Ā MeV neutron spectra measurements with 4% energy resolution using a type IIa diamond detector [Crossref]
- 2003 - CVD diamond as a high bandwidth neutron detector for inertial confinement fusion diagnostics [Crossref]
- 2024 - Determination of the response for the national ignition facility particle time of flight (PTOF) detector using single particle counting [Crossref]