skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Trade Study for Neutron Transport at Low Earth Orbit: Adding Fidelity to DIORAMA

Abstract

The Distributed Infrastructure Offering Real-Time Access to Modeling and Analysis (DIORAMA) software provides performance modeling capabilities of the United States Nuclear Detonation Detection System (USNDS) with a focus on the characterization of Space-Based Nuclear Detonation Detection (SNDD) instrument performance [1]. A case study was done to add the neutron propagation capabilities of DIORAMA to low earth orbit (LEO), and compare the back-calculated incident energy from the time-of- ight (TOF) spectrum with the scored incident energy spectrum. As the scoring altitude lowers, the time increase due to scattering takes up much more of the fraction of total TOF; whereas at geosynchronous earth orbit (GEO), the time increase due to scattering is a negligible fraction of the total TOF [2]. The scattering smears out the TOF enough to make the back-calculation of the initial energy spectrum from the TOF spectrum very convoluted.

Authors:
 [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1377371
Report Number(s):
LA-UR-17-27560
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 97 MATHEMATICS AND COMPUTING; Monte Carlo; neutron; atmospheric; signal propagation

Citation Formats

McClanahan, Tucker Caden, and Wakeford, Daniel Tyler. Trade Study for Neutron Transport at Low Earth Orbit: Adding Fidelity to DIORAMA. United States: N. p., 2017. Web. doi:10.2172/1377371.
McClanahan, Tucker Caden, & Wakeford, Daniel Tyler. Trade Study for Neutron Transport at Low Earth Orbit: Adding Fidelity to DIORAMA. United States. doi:10.2172/1377371.
McClanahan, Tucker Caden, and Wakeford, Daniel Tyler. Tue . "Trade Study for Neutron Transport at Low Earth Orbit: Adding Fidelity to DIORAMA". United States. doi:10.2172/1377371. https://www.osti.gov/servlets/purl/1377371.
@article{osti_1377371,
title = {Trade Study for Neutron Transport at Low Earth Orbit: Adding Fidelity to DIORAMA},
author = {McClanahan, Tucker Caden and Wakeford, Daniel Tyler},
abstractNote = {The Distributed Infrastructure Offering Real-Time Access to Modeling and Analysis (DIORAMA) software provides performance modeling capabilities of the United States Nuclear Detonation Detection System (USNDS) with a focus on the characterization of Space-Based Nuclear Detonation Detection (SNDD) instrument performance [1]. A case study was done to add the neutron propagation capabilities of DIORAMA to low earth orbit (LEO), and compare the back-calculated incident energy from the time-of- ight (TOF) spectrum with the scored incident energy spectrum. As the scoring altitude lowers, the time increase due to scattering takes up much more of the fraction of total TOF; whereas at geosynchronous earth orbit (GEO), the time increase due to scattering is a negligible fraction of the total TOF [2]. The scattering smears out the TOF enough to make the back-calculation of the initial energy spectrum from the TOF spectrum very convoluted.},
doi = {10.2172/1377371},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {8}
}

Technical Report:

Save / Share: