A new neutron time-of-flight detector for yield and ion-temperature measurements in DT implosions on OMEGA

Schwemmlein, A. K.; Forrest, C. J.; Knauer, J. P.; McClow, H.; Stanley, B.; Romanofsky, M. H.; Stoeckl, C.; Rosenberg, M. J.; Glebov, V. Yu.

doi:10.1063/5.0288867

A new neutron time-of-flight detector for yield and ion-temperature measurements in DT implosions on OMEGA

Journal Article · Fri Sep 12 00:00:00 EDT 2025 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0288867· OSTI ID:2997918

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Laboratory for Laser Energetics, Rochester, NY (United States)

A new neutron time-of-flight (nTOF) detector for yield and ion-temperature measurements in deuterium–tritium (DT) implosions was designed, installed, and calibrated on the OMEGA Laser System. This detector was installed at θ = 46.8° from the vertical and φ = 84.9°, previously a region without other detectors, in order to decrease the uncertainty of low-mode asymmetry measurements by six other nTOF detectors. The new nTOF detector uses the “PMT only” concept [Glebov et al., Rev. Sci. Instrum. 92, 013509 (2021)] and consists of a Photek photomultiplier tube (PMT)-110 in a thin aluminum housing. There is no lead shielding in front of the PMT to allow measurements of the x-ray instrument response function of the detector. The detector is installed in the OMEGA H2-port line of sight at 9.3 m from the target chamber center in the OMEGA Target Bay and is called the H2 nTOF detector. The H2 nTOF measures DT yields in the 1 × 10¹³ to 3 × 10¹⁴ range and ion temperatures from 2 to 12 keV. H2 nTOF reduced the hotspot flow uncertainty in the z-direction from ±10 to ±8 km/s, and the uncertainty in the anisotropic flow axis from σ_θ = ±26° to ±13° and σ_φ = ±25° to ±21°. Here, the design details, performance, and calibration results of the H2 nTOF detector in DT implosions on OMEGA will be presented.

Research Organization:: University of Rochester, NY (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0004144

OSTI ID:: 2997918

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 9 Vol. 96; ISSN 1089-7623; ISSN 0034-6748

Publisher:: AIP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

References (13)

Three-dimensional reconstruction of implosion stagnation in laser direct drive on OMEGA Churnetski, K.; Woo, K. M.; Theobald, W. High Energy Density Physics, Vol. 52 https://doi.org/10.1016/j.hedp.2024.101108	journal	September 2024
A suite of neutron time-of-flight detectors to measure hot-spot motion in direct-drive inertial confinement fusion experiments on OMEGA Mannion, O. M.; Knauer, J. P.; Glebov, V. Yu. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 964 https://doi.org/10.1016/j.nima.2020.163774	journal	June 2020
Interpretation of neutron time-of-flight signals from current-mode detectors Murphy, T. J.; Chrien, R. E.; Klare, K. A. Review of Scientific Instruments, Vol. 68, Issue 1 https://doi.org/10.1063/1.1147763	journal	January 1997
Wide-dynamic-range “neutron bang time” detector on OMEGA Stoeckl, C.; Glebov, V. Yu.; Zuegel, J. D. Review of Scientific Instruments, Vol. 73, Issue 11 https://doi.org/10.1063/1.1511804	journal	November 2002
A new neutron time-of-flight detector for fuel-areal-density measurements on OMEGA Glebov, V. Yu.; Forrest, C. J.; Marshall, K. L. Review of Scientific Instruments, Vol. 85, Issue 11 https://doi.org/10.1063/1.4886428	journal	November 2014
Testing a Cherenkov neutron time-of-flight detector on OMEGA Glebov, V. Yu.; Eckart, M. J.; Forrest, C. J. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5035289	journal	October 2018
Area and extraction field analysis of the analogue saturation of 40 mm microchannel plate photomultiplier tubes Milnes, J. S.; Conneely, T. M.; Horsfield, C. J. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5036635	journal	October 2018
Calibration of a neutron time-of-flight detector with a rapid instrument response function for measurements of bulk fluid motion on OMEGA Mannion, O. M.; Glebov, V. Yu.; Forrest, C. J. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5037324	journal	October 2018
Impact of three-dimensional hot-spot flow asymmetry on ion-temperature measurements in inertial confinement fusion experiments Woo, K. M.; Betti, R.; Shvarts, D. Physics of Plasmas, Vol. 25, Issue 10 https://doi.org/10.1063/1.5048429	journal	October 2018
A novel photomultiplier tube neutron time-of-flight detector Glebov, V. Yu.; Stoeckl, C.; Forrest, C. J. Review of Scientific Instruments, Vol. 92, Issue 1 https://doi.org/10.1063/5.0029005	journal	January 2021
Interpreting inertial fusion neutron spectra Munro, David H. Nuclear Fusion, Vol. 56, Issue 3 https://doi.org/10.1088/0029-5515/56/3/036001	journal	February 2016
Fusion neutron energies and spectra Brysk, H. Plasma Physics, Vol. 15, Issue 7 https://doi.org/10.1088/0032-1028/15/7/001	journal	July 1973
The production spectrum in fusion plasmas Appelbe, B.; Chittenden, J. Plasma Physics and Controlled Fusion, Vol. 53, Issue 4 https://doi.org/10.1088/0741-3335/53/4/045002	journal	February 2011

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