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.; Knauer, J. P.; Goncharov, V. N.; Regan, S. P.; Sangster, T. C.; Stoeckl, C.; Gatu Johnson, M.

doi:10.1063/1.5037324

Title: Calibration of a neutron time-of-flight detector with a rapid instrument response function for measurements of bulk fluid motion on OMEGA

Abstract

A newly developed neutron time-of-flight (nTOF) diagnostic with a fast instrument response function has been fielded on the OMEGA laser in a highly collimated line of sight. In this study, by using a small plastic scintillator volume, the detector provides a narrow instrument response of 1.7 ns full width at half maximum while maintaining a large signal-to-noise ratio for neutron yields between 10¹⁰ and 10¹⁴. The OMEGA hardware timing system is used along with an optical fiducial to provide an absolute nTOF measurement to an accuracy of ~56 ps. The fast instrument response enables the accurate measurement of the primary deuterium-tritium neutron peak shape, while the optical fiducial allows for an absolute neutron energy measurement. The new detector measures the neutron mean energy with an uncertainty of ~7 keV, corresponding to a hot-spot velocity projection uncertainty of ~12 km/s. Finally, evidence of bulk fluid motion in cryogenic targets is presented with measurements of the neutron energy spectrum.

Authors:

^[1]; Glebov, V. Yu. ^[1]; Forrest, C. J. ^[1]; Knauer, J. P. ^[1]; Goncharov, V. N. ^[1]; Regan, S. P. ^[1];

^[1]; Stoeckl, C. ^[1];

^[2]

Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center

Publication Date:: Thu Oct 11 00:00:00 EDT 2018

Research Org.:: Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1477183

Alternate Identifier(s):: OSTI ID: 1477145

Report Number(s):: 2017-265, 1441
Journal ID: ISSN 0034-6748; 2017-265, 1441, 2399

Grant/Contract Number:: NA0001944

Resource Type:: Accepted Manuscript

Journal Name:: Review of Scientific Instruments

Additional Journal Information:: Journal Volume: 89; Journal Issue: 10; Conference: 22nd Topical Conference on High Temperature Plasma Diagnostics, San Diego, CA, 16-19 April 2018; Journal ID: ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats


                    Mannion, O. M., Glebov, V. Yu., Forrest, C. J., Knauer, J. P., Goncharov, V. N., Regan, S. P., Sangster, T. C., Stoeckl, C., and Gatu Johnson, M. Calibration of a neutron time-of-flight detector with a rapid instrument response function for measurements of bulk fluid motion on OMEGA.  United States: N. p., 2018. 
Web.  doi:10.1063/1.5037324.

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                    Mannion, O. M., Glebov, V. Yu., Forrest, C. J., Knauer, J. P., Goncharov, V. N., Regan, S. P., Sangster, T. C., Stoeckl, C., & Gatu Johnson, M. Calibration of a neutron time-of-flight detector with a rapid instrument response function for measurements of bulk fluid motion on OMEGA.  United States.  https://doi.org/10.1063/1.5037324

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                    Mannion, O. M., Glebov, V. Yu., Forrest, C. J., Knauer, J. P., Goncharov, V. N., Regan, S. P., Sangster, T. C., Stoeckl, C., and Gatu Johnson, M. Thu .  
"Calibration of a neutron time-of-flight detector with a rapid instrument response function for measurements of bulk fluid motion on OMEGA".  United States.  https://doi.org/10.1063/1.5037324.  https://www.osti.gov/servlets/purl/1477183.

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@article{osti_1477183,

  title        = {Calibration of a neutron time-of-flight detector with a rapid instrument response function for measurements of bulk fluid motion on OMEGA},

  author       = {Mannion, O. M. and Glebov, V. Yu. and Forrest, C. J. and Knauer, J. P. and Goncharov, V. N. and Regan, S. P. and Sangster, T. C. and Stoeckl, C. and Gatu Johnson, M.},

  abstractNote = {A newly developed neutron time-of-flight (nTOF) diagnostic with a fast instrument response function has been fielded on the OMEGA laser in a highly collimated line of sight. In this study, by using a small plastic scintillator volume, the detector provides a narrow instrument response of 1.7 ns full width at half maximum while maintaining a large signal-to-noise ratio for neutron yields between 1010 and 1014. The OMEGA hardware timing system is used along with an optical fiducial to provide an absolute nTOF measurement to an accuracy of ~56 ps. The fast instrument response enables the accurate measurement of the primary deuterium-tritium neutron peak shape, while the optical fiducial allows for an absolute neutron energy measurement. The new detector measures the neutron mean energy with an uncertainty of ~7 keV, corresponding to a hot-spot velocity projection uncertainty of ~12 km/s. Finally, evidence of bulk fluid motion in cryogenic targets is presented with measurements of the neutron energy spectrum.},

  doi          = {10.1063/1.5037324},

  journal      = {Review of Scientific Instruments},

  number       = 10,

  volume       = 89,

  place        = {United States},

  year         = {Thu Oct 11 00:00:00 EDT 2018},

  month        = {Thu Oct 11 00:00:00 EDT 2018}

}

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https://doi.org/10.1063/1.5037324

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Cited by: 16 works

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Figures / Tables:

FIG. 1: The detector design consists of small quenched plastic scintillator (purple) connected to a light guide, which is connected to a photomultiplier tube (PMT140) (yellow). Neutrons (orange) are incident on the front face of the scintillator.

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Works referenced in this record:

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Munro, D. H.; Field, J. E.; Hatarik, R.
Physics of Plasmas, Vol. 24, Issue 5
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Works referencing / citing this record:

Measurement of apparent ion temperature using the magnetic recoil spectrometer at the OMEGA laser facility
journal, October 2018

Gatu Johnson, M.; Katz, J.; Forrest, C.
Review of Scientific Instruments, Vol. 89, Issue 10
DOI: 10.1063/1.5035287

Testing a Cherenkov neutron time-of-flight detector on OMEGA
journal, October 2018

Glebov, V. Yu.; Eckart, M. J.; Forrest, C. J.
Review of Scientific Instruments, Vol. 89, Issue 10
DOI: 10.1063/1.5035289

Fuel-shell interface instability growth effects on the performance of room temperature direct-drive implosions
journal, August 2019

Miller, S. C.; Knauer, J. P.; Forrest, C. J.
Physics of Plasmas, Vol. 26, Issue 8
DOI: 10.1063/1.5104338

Neutron backscatter edge: A measure of the hydrodynamic properties of the dense DT fuel at stagnation in ICF experiments
journal, January 2020

Crilly, A. J.; Appelbe, B. D.; Mannion, O. M.
Physics of Plasmas, Vol. 27, Issue 1
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The National Direct-Drive Inertial Confinement Fusion Program
journal, December 2018

Regan, S. P.; Goncharov, V. N.; Sangster, T. C.
Nuclear Fusion, Vol. 59, Issue 3
DOI: 10.1088/1741-4326/aae9b5

Figures / Tables found in this record:

Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.

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Title: Calibration of a neutron time-of-flight detector with a rapid instrument response function for measurements of bulk fluid motion on OMEGA

Abstract

Citation Formats

Figures / Tables:

Impact of temperature-velocity distribution on fusion neutron peak shape journal, May 2017

The effect of turbulent kinetic energy on inferred ion temperature from neutron spectra journal, July 2014

Relativistically correct DD and DT neutron spectra journal, June 2014

Signal processing considerations for liquid ionization calorimeters in a high rate environment journal, January 1994

Observations of the collapse of asymmetrically driven convergent shocks journal, March 2008

Multidimensional analysis of direct-drive, plastic-shell implosions on OMEGA journal, May 2005

Neutron temporal diagnostic for high-yield deuterium–tritium cryogenic implosions on OMEGA journal, May 2016

Systematic Fuel Cavity Asymmetries in Directly Driven Inertial Confinement Fusion Implosions journal, March 2017

Interpreting inertial fusion neutron spectra journal, February 2016

Measurements of collective fuel velocities in deuterium-tritium exploding pusher and cryogenically layered deuterium-tritium implosions on the NIF journal, April 2013

Mode 1 drive asymmetry in inertial confinement fusion implosions on the National Ignition Facility journal, April 2014

Analysis of the neutron time-of-flight spectra from inertial confinement fusion experiments journal, November 2015

Relativistic calculation of fusion product spectra for thermonuclear plasmas journal, November 1998

Three-dimensional hydrodynamic simulations of OMEGA implosions journal, May 2017

A compact neutron spectrometer for characterizing inertial confinement fusion implosions at OMEGA and the NIF journal, June 2014

Timing characteristics of Large Area Picosecond Photodetectors journal, September 2015

Laser fusion ion temperatures determined by neutron time‐of‐flight techniques journal, November 1977

A self-calibrating, multichannel streak camera for inertial confinement fusion applications journal, July 2002

Fusion neutron energies and spectra journal, July 1973

The production spectrum in fusion plasmas journal, February 2011

Measurement of apparent ion temperature using the magnetic recoil spectrometer at the OMEGA laser facility journal, October 2018

Testing a Cherenkov neutron time-of-flight detector on OMEGA journal, October 2018

Fuel-shell interface instability growth effects on the performance of room temperature direct-drive implosions journal, August 2019

Neutron backscatter edge: A measure of the hydrodynamic properties of the dense DT fuel at stagnation in ICF experiments journal, January 2020

The National Direct-Drive Inertial Confinement Fusion Program journal, December 2018

Impact of temperature-velocity distribution on fusion neutron peak shape
journal, May 2017

The effect of turbulent kinetic energy on inferred ion temperature from neutron spectra
journal, July 2014

Relativistically correct DD and DT neutron spectra
journal, June 2014

Signal processing considerations for liquid ionization calorimeters in a high rate environment
journal, January 1994

Observations of the collapse of asymmetrically driven convergent shocks
journal, March 2008

Multidimensional analysis of direct-drive, plastic-shell implosions on OMEGA
journal, May 2005

Neutron temporal diagnostic for high-yield deuterium–tritium cryogenic implosions on OMEGA
journal, May 2016

Systematic Fuel Cavity Asymmetries in Directly Driven Inertial Confinement Fusion Implosions
journal, March 2017

Interpreting inertial fusion neutron spectra
journal, February 2016

Measurements of collective fuel velocities in deuterium-tritium exploding pusher and cryogenically layered deuterium-tritium implosions on the NIF
journal, April 2013

Mode 1 drive asymmetry in inertial confinement fusion implosions on the National Ignition Facility
journal, April 2014

Analysis of the neutron time-of-flight spectra from inertial confinement fusion experiments
journal, November 2015

Relativistic calculation of fusion product spectra for thermonuclear plasmas
journal, November 1998

Three-dimensional hydrodynamic simulations of OMEGA implosions
journal, May 2017

A compact neutron spectrometer for characterizing inertial confinement fusion implosions at OMEGA and the NIF
journal, June 2014

Timing characteristics of Large Area Picosecond Photodetectors
journal, September 2015

Laser fusion ion temperatures determined by neutron time‐of‐flight techniques
journal, November 1977

A self-calibrating, multichannel streak camera for inertial confinement fusion applications
journal, July 2002

Fusion neutron energies and spectra
journal, July 1973

The production spectrum in fusion plasmas
journal, February 2011

Measurement of apparent ion temperature using the magnetic recoil spectrometer at the OMEGA laser facility
journal, October 2018

Testing a Cherenkov neutron time-of-flight detector on OMEGA
journal, October 2018

Fuel-shell interface instability growth effects on the performance of room temperature direct-drive implosions
journal, August 2019

Neutron backscatter edge: A measure of the hydrodynamic properties of the dense DT fuel at stagnation in ICF experiments
journal, January 2020

The National Direct-Drive Inertial Confinement Fusion Program
journal, December 2018