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Title: Distribution of collected target debris using the large area solid debris radiochemistry collector

Abstract

A large area solid radiochemistry collector was deployed at the National Ignition Facility (NIF) with a collection efficiency for post-shot, solid target debris of approximately 1% of the total 4π solid angle. The collector consisted of a 20-cm diameter vanadium foil surrounded by an aluminum side-enclosure and was fielded 50 cm from the NIF target. The collector was used on two NIF neutron yield shots, both of which had a monolayer of 238U embedded in the capsule ablator 10 μm from the inner surface. Fission and activation products produced in the 238U were collected, and subsequent analyses via gamma spectroscopy indicated that the distribution of fission products was not uniform, with peak and valley fission products preferentially collected on the vanadium and low- and high-mass fission products primarily located on the aluminum side-enclosure. The results from these shots will be used to design future nuclear data experiments at NIF.

Authors:
 [1];  [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1];  [1]
  1. 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:
1545510
Alternate Identifier(s):
OSTI ID: 1477214
Grant/Contract Number:  
AC52-07NA27344; 16-SI-001
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:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Despotopulos, J. D., Shaughnessy, D. A., Gharibyan, N., Moody, K. J., Grant, P. M., Yeamans, C. B., and Waltz, C. S. Distribution of collected target debris using the large area solid debris radiochemistry collector. United States: N. p., 2018. Web. doi:10.1063/1.5039325.
Despotopulos, J. D., Shaughnessy, D. A., Gharibyan, N., Moody, K. J., Grant, P. M., Yeamans, C. B., & Waltz, C. S. Distribution of collected target debris using the large area solid debris radiochemistry collector. United States. doi:10.1063/1.5039325.
Despotopulos, J. D., Shaughnessy, D. A., Gharibyan, N., Moody, K. J., Grant, P. M., Yeamans, C. B., and Waltz, C. S. Fri . "Distribution of collected target debris using the large area solid debris radiochemistry collector". United States. doi:10.1063/1.5039325. https://www.osti.gov/servlets/purl/1545510.
@article{osti_1545510,
title = {Distribution of collected target debris using the large area solid debris radiochemistry collector},
author = {Despotopulos, J. D. and Shaughnessy, D. A. and Gharibyan, N. and Moody, K. J. and Grant, P. M. and Yeamans, C. B. and Waltz, C. S.},
abstractNote = {A large area solid radiochemistry collector was deployed at the National Ignition Facility (NIF) with a collection efficiency for post-shot, solid target debris of approximately 1% of the total 4π solid angle. The collector consisted of a 20-cm diameter vanadium foil surrounded by an aluminum side-enclosure and was fielded 50 cm from the NIF target. The collector was used on two NIF neutron yield shots, both of which had a monolayer of 238U embedded in the capsule ablator 10 μm from the inner surface. Fission and activation products produced in the 238U were collected, and subsequent analyses via gamma spectroscopy indicated that the distribution of fission products was not uniform, with peak and valley fission products preferentially collected on the vanadium and low- and high-mass fission products primarily located on the aluminum side-enclosure. The results from these shots will be used to design future nuclear data experiments at NIF.},
doi = {10.1063/1.5039325},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

FIG. 1 FIG. 1: The LASR assembly (pre-shot) before being mounted onto the end of the DIM for insertion into the NIF target chamber.

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Works referenced in this record:

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