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Title: Combined neutron and x-ray imaging at the National Ignition Facility (invited)

X-ray and neutrons are commonly used to image Inertial Confinement Fusion implosions, providing key diagnostic information on the fuel assembly of burning DT fuel. The x-ray and neutron data provided are complementary as the production of neutrons and x-rays occur from different physical processes, but typically these two images are collected from different views with no opportunity for co-registration of the two images. Neutrons are produced where the DT fusion fuel is burning; X-rays are produced in regions corresponding to high temperatures. Processes such as mix of ablator material into the hotspot can result in increased x-ray production and decreased neutron production but can only be confidently observed if the two images are collected along the same line of sight and co-registered. To allow direct comparison of x-ray and neutron data, a Combined Neutron X-ray Imaging system has been tested at Omega and installed at the National Ignition Facility to collect an x-ray image along the currently installed neutron imaging line-of-sight. Here, this system is described, and initial results are presented along with prospects for definitive coregistration of the images.
Authors:
 [1] ;  [2] ; ORCiD logo [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ; ORCiD logo [1] ; ORCiD logo [1] ;  [1] ;  [2] ; ORCiD logo [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Report Number(s):
LLNL-PROC-696137; LA-UR-16-24588
Journal ID: ISSN 0034-6748; RSINAK
Grant/Contract Number:
AC52-07NA27344; AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 11; Conference: Proceedings of the 21st Conference on High-Temperature Plasma Diagnostics, Madison, WI (United States), 5-9 Jun 2016; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 22 GENERAL STUDIES OF NUCLEAR REACTORS
OSTI Identifier:
1262174
Alternate Identifier(s):
OSTI ID: 1414128

Danly, C. R., Christensen, K., Fatherley, Valerie E., Fittinghoff, D. N., Grim, G. P., Hibbard, R., Izumi, N., Jedlovec, D., Merrill, Frank Edward, Schmidt, Derek William, Simpson, Raspberry A., Skulina, K., Volegov, Petr Lvovich, and Wilde, Carl Huerstel. Combined neutron and x-ray imaging at the National Ignition Facility (invited). United States: N. p., Web. doi:10.1063/1.4962194.
Danly, C. R., Christensen, K., Fatherley, Valerie E., Fittinghoff, D. N., Grim, G. P., Hibbard, R., Izumi, N., Jedlovec, D., Merrill, Frank Edward, Schmidt, Derek William, Simpson, Raspberry A., Skulina, K., Volegov, Petr Lvovich, & Wilde, Carl Huerstel. Combined neutron and x-ray imaging at the National Ignition Facility (invited). United States. doi:10.1063/1.4962194.
Danly, C. R., Christensen, K., Fatherley, Valerie E., Fittinghoff, D. N., Grim, G. P., Hibbard, R., Izumi, N., Jedlovec, D., Merrill, Frank Edward, Schmidt, Derek William, Simpson, Raspberry A., Skulina, K., Volegov, Petr Lvovich, and Wilde, Carl Huerstel. 2016. "Combined neutron and x-ray imaging at the National Ignition Facility (invited)". United States. doi:10.1063/1.4962194. https://www.osti.gov/servlets/purl/1262174.
@article{osti_1262174,
title = {Combined neutron and x-ray imaging at the National Ignition Facility (invited)},
author = {Danly, C. R. and Christensen, K. and Fatherley, Valerie E. and Fittinghoff, D. N. and Grim, G. P. and Hibbard, R. and Izumi, N. and Jedlovec, D. and Merrill, Frank Edward and Schmidt, Derek William and Simpson, Raspberry A. and Skulina, K. and Volegov, Petr Lvovich and Wilde, Carl Huerstel},
abstractNote = {X-ray and neutrons are commonly used to image Inertial Confinement Fusion implosions, providing key diagnostic information on the fuel assembly of burning DT fuel. The x-ray and neutron data provided are complementary as the production of neutrons and x-rays occur from different physical processes, but typically these two images are collected from different views with no opportunity for co-registration of the two images. Neutrons are produced where the DT fusion fuel is burning; X-rays are produced in regions corresponding to high temperatures. Processes such as mix of ablator material into the hotspot can result in increased x-ray production and decreased neutron production but can only be confidently observed if the two images are collected along the same line of sight and co-registered. To allow direct comparison of x-ray and neutron data, a Combined Neutron X-ray Imaging system has been tested at Omega and installed at the National Ignition Facility to collect an x-ray image along the currently installed neutron imaging line-of-sight. Here, this system is described, and initial results are presented along with prospects for definitive coregistration of the images.},
doi = {10.1063/1.4962194},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = {2016},
month = {10}
}