Using multiple neutron time of flight detectors to determine the hot spot velocity
Abstract
An important diagnostic value of a shot at the National Ignition Facility is the resultant center-of-mass motion of the imploding capsule. This residual velocity reduces the efficiency of converting laser energy into plasma temperature. A new analysis method extracts the effective hot spot motion by using information from multiple neutron time-of-flight (nToF) lines-of-sight (LoSs). This technique fits a near Gaussian spectrum to the nToF scope traces and overcomes reliance on models to relate the plasma temperature to the mean energy of the emitted neutrons. This method requires having at least four nToF LoSs. The results of this analysis will be compared to an approach where each LoS is analyzed separately and a model is employed to infer the mean energy of the emitted neutrons
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1545515
- Alternate Identifier(s):
- OSTI ID: 1477910
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 89; Journal Issue: 10; Conference: 22. Topical Conference on High-Temperature Plasma Diagnostics, San Diego, CA (United States), Apr. 2018; Journal ID: ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 47 OTHER INSTRUMENTATION
Citation Formats
Hatarik, R., Nora, R. C., Spears, B. K., Eckart, M. J., Grim, G. P., Hartouni, E. P., Moore, A. S., and Schlossberg, D. J. Using multiple neutron time of flight detectors to determine the hot spot velocity. United States: N. p., 2018.
Web. doi:10.1063/1.5039372.
Hatarik, R., Nora, R. C., Spears, B. K., Eckart, M. J., Grim, G. P., Hartouni, E. P., Moore, A. S., & Schlossberg, D. J. Using multiple neutron time of flight detectors to determine the hot spot velocity. United States. https://doi.org/10.1063/1.5039372
Hatarik, R., Nora, R. C., Spears, B. K., Eckart, M. J., Grim, G. P., Hartouni, E. P., Moore, A. S., and Schlossberg, D. J. Wed .
"Using multiple neutron time of flight detectors to determine the hot spot velocity". United States. https://doi.org/10.1063/1.5039372. https://www.osti.gov/servlets/purl/1545515.
@article{osti_1545515,
title = {Using multiple neutron time of flight detectors to determine the hot spot velocity},
author = {Hatarik, R. and Nora, R. C. and Spears, B. K. and Eckart, M. J. and Grim, G. P. and Hartouni, E. P. and Moore, A. S. and Schlossberg, D. J.},
abstractNote = {An important diagnostic value of a shot at the National Ignition Facility is the resultant center-of-mass motion of the imploding capsule. This residual velocity reduces the efficiency of converting laser energy into plasma temperature. A new analysis method extracts the effective hot spot motion by using information from multiple neutron time-of-flight (nToF) lines-of-sight (LoSs). This technique fits a near Gaussian spectrum to the nToF scope traces and overcomes reliance on models to relate the plasma temperature to the mean energy of the emitted neutrons. This method requires having at least four nToF LoSs. The results of this analysis will be compared to an approach where each LoS is analyzed separately and a model is employed to infer the mean energy of the emitted neutrons},
doi = {10.1063/1.5039372},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {Wed Oct 17 00:00:00 EDT 2018},
month = {Wed Oct 17 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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Works referencing / citing this record:
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Figures / Tables found in this record: