Bulletin of the American Physical Society
63rd Annual Meeting of the APS Division of Plasma Physics
Volume 66, Number 13
Monday–Friday, November 8–12, 2021; Pittsburgh, PA
Session NP11: Poster Session V:
HED
ICF
MFE- Turbulence & Transport
9:30 AM - 12:30 PM
Wednesday, November 10, 2021
Room: Hall A
Abstract: NP11.00087 : Neutron diagnostics and timing on the MJOLNIR dense plasma focus *
Presenter:
Christopher M Cooper
(Lawrence Livermore Natl Lab)
Authors:
Christopher M Cooper
(Lawrence Livermore Natl Lab)
Clement S Goyon
(Lawrence Livermore Natl Lab)
Andrea E Schmidt
(Lawrence Livermore National Laboratory)
Rick Anaya
(Lawrence Livermore Natl Lab)
Michael G Anderson
(Lawrence Livermore Natl Lab)
Paul C Campbell
(Lawrence Livermore Natl Lab)
Steven Chapman
(Lawrence Livermore Natl Lab)
Owen B Drury
(Lawrence Livermore Natl Lab)
Luis Frausto
(Lawrence Livermore Natl Lab)
Drew P Higginson
(Lawrence Livermore Natl Lab)
Anthony J Link
(Lawrence Livermore Natl Lab)
Don Max
(Mission Support and Test Services)
Alexander P Povilus
(Lawrence Livermore Natl Lab)
Sophia Rocco
(Lawrence Livermore Natl Lab)
William Waggoner
(Lawrence Livermore Natl Lab)
Kurt Walters
(Lawrence Livermore Natl Lab)
These include:
PMT-coupled scintillators 4 m and 6 m away and SIPM-coupled scintillators 0.4 m away provide information about the neutron flux envelope. Beryllium, Bromine, and Yttrium activation detectors monitor the yield, the scattering contribution, and the dose to the neutron camera. A 16-frame, 3 ns exposure framing camera monitors pinch stagnation, breakup time, and location. Frequency-calibrated electromagnetic probes monitor the current and electric field in the DPF circuit at the time of neutron production.
Diagnostics are analyzed to quantify timing jitter from small differences in fill pressure and bank voltage (1 part in 1000). The data are analyzed to assess what happens in a high yield vs low yield pinch.
*Prepared by LLNL under Contract DE-AC52-07NA27344.
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