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Title: Measurements of temporally- and spatially-resolved neutron production in a sheared-flow stabilized Z-pinch

Abstract

A novel approach using multiple scintillator detectors is applied to measure temporally- and spatially-resolved neutron production in the Fusion Z-pinch Experiment (FuZE) device, a Sheared-Flow Stabilized (SFS) Z-pinch. Diagnosing neutron production from FuZE is important for determining if fusion is thermonuclear and whether the FuZE device can be scaled toward reactor conditions. Absolute yields of up to 2 × 105 neutrons per discharge are measured with calibrated plastic scintillator detectors operating in pulse-counting mode. Neutron emission durations of up to ~8 μs are inferred by recording the time difference between the first and last pulses for each discharge. Multiple scintillator detectors located at different positions with respect to the fusing plasma are used to demonstrate that the axial extent of the neutron producing region is comparable to the device volume. Scintillator detectors are well-suited as neutron diagnostics for FuZE and other plasma devices with similar yields and emission durations. Increasing the neutron yield, duration, and volume of the neutron emitting region within the plasma column are significant experimental objectives for FuZE.

Authors:
 [1];  [1];  [2];  [3];  [3];  [2];  [1];  [2];  [2];  [2];  [1];  [2];  [2];  [2];  [1];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Washington, Seattle, WA (United States)
  3. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1811753
Alternate Identifier(s):
OSTI ID: 1568948
Report Number(s):
LLNL-JRNL-817831
Journal ID: ISSN 0168-9002; 1027769; TRN: US2213193
Grant/Contract Number:  
AC52-07NA27344; AR-0000571
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 947; Journal Issue: N/A; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Neutron; Scintillator detector; FusionZ-pinch; Plasma physics

Citation Formats

Mitrani, James M., Higginson, Drew P., Draper, Zack T., Morrell, Jonathan, Bernstein, Lee A., Claveau, Elliot L., Cooper, Christopher M., Forbes, Eleanor G., Golingo, Ray P., Nelson, Brian A., Schmidt, Andrea E., Stepanov, Anton D., Weber, Tobin R., Zhang, Yue, McLean, Harry S., and Shumlak, Uri. Measurements of temporally- and spatially-resolved neutron production in a sheared-flow stabilized Z-pinch. United States: N. p., 2019. Web. doi:10.1016/j.nima.2019.162764.
Mitrani, James M., Higginson, Drew P., Draper, Zack T., Morrell, Jonathan, Bernstein, Lee A., Claveau, Elliot L., Cooper, Christopher M., Forbes, Eleanor G., Golingo, Ray P., Nelson, Brian A., Schmidt, Andrea E., Stepanov, Anton D., Weber, Tobin R., Zhang, Yue, McLean, Harry S., & Shumlak, Uri. Measurements of temporally- and spatially-resolved neutron production in a sheared-flow stabilized Z-pinch. United States. https://doi.org/10.1016/j.nima.2019.162764
Mitrani, James M., Higginson, Drew P., Draper, Zack T., Morrell, Jonathan, Bernstein, Lee A., Claveau, Elliot L., Cooper, Christopher M., Forbes, Eleanor G., Golingo, Ray P., Nelson, Brian A., Schmidt, Andrea E., Stepanov, Anton D., Weber, Tobin R., Zhang, Yue, McLean, Harry S., and Shumlak, Uri. Sun . "Measurements of temporally- and spatially-resolved neutron production in a sheared-flow stabilized Z-pinch". United States. https://doi.org/10.1016/j.nima.2019.162764. https://www.osti.gov/servlets/purl/1811753.
@article{osti_1811753,
title = {Measurements of temporally- and spatially-resolved neutron production in a sheared-flow stabilized Z-pinch},
author = {Mitrani, James M. and Higginson, Drew P. and Draper, Zack T. and Morrell, Jonathan and Bernstein, Lee A. and Claveau, Elliot L. and Cooper, Christopher M. and Forbes, Eleanor G. and Golingo, Ray P. and Nelson, Brian A. and Schmidt, Andrea E. and Stepanov, Anton D. and Weber, Tobin R. and Zhang, Yue and McLean, Harry S. and Shumlak, Uri},
abstractNote = {A novel approach using multiple scintillator detectors is applied to measure temporally- and spatially-resolved neutron production in the Fusion Z-pinch Experiment (FuZE) device, a Sheared-Flow Stabilized (SFS) Z-pinch. Diagnosing neutron production from FuZE is important for determining if fusion is thermonuclear and whether the FuZE device can be scaled toward reactor conditions. Absolute yields of up to 2 × 105 neutrons per discharge are measured with calibrated plastic scintillator detectors operating in pulse-counting mode. Neutron emission durations of up to ~8 μs are inferred by recording the time difference between the first and last pulses for each discharge. Multiple scintillator detectors located at different positions with respect to the fusing plasma are used to demonstrate that the axial extent of the neutron producing region is comparable to the device volume. Scintillator detectors are well-suited as neutron diagnostics for FuZE and other plasma devices with similar yields and emission durations. Increasing the neutron yield, duration, and volume of the neutron emitting region within the plasma column are significant experimental objectives for FuZE.},
doi = {10.1016/j.nima.2019.162764},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = N/A,
volume = 947,
place = {United States},
year = {2019},
month = {12}
}

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