Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session NP11: Poster Session V: In-Person, Hall A (9:30-11:00am) and Virtual Poster Presentations (11:15am-12:30pm)
MFE: Stellerators
HED: High Energy Density
BEAMS: Short Pulse Laser Plasmas
HED: Short Pulse Laser Plasma
SPACE: Space Plasmas
9:30 AM - 12:30 PM
Wednesday, October 19, 2022
Room: Exhibit Hall A and Online
Abstract: NP11.00076 : The Effect of Anode Shapes on Neutron Yield in a 4.4 kJ Dense Plasma Focus Device*
Presenter:
Veronica Eudave
(University of California, San Diego)
Authors:
Veronica Eudave
(University of California, San Diego)
Maria Pia Validivia
(University of California, San Diego)
Swarvanu Ghosh
(University of California, San Diego)
Jacquelynne Vaughan
(University of California, San Diego)
Eric N Hahn
(University of California, San Diego)
Fabio Conti
(University of California, San Diego)
Farhat N Beg
(University of California, San Diego)
The Dense Plasma Focus (DPF) serves as a source of neutrons and electrons. Experiments to investigate five different anode geometries were executed at 4.4 kJ (voltage ~20 kV, current ~230 kA). Spherical and flat anodes with and without a center cavity were explored. A series of time-resolved Schlieren probing, filtered X-ray PIN diodes, and neutron activation detectors were used to get information about pinch dynamics. It was found that neutron yield is optimized for a hollow anode with a maximum yield of 1.97E+08 per pulse, while x-ray emission is optimized using a solid anode, despite the geometry of the tip. This analysis leads to the conclusion that an anode with a cavity optimizes neutron yield while the anode without the cavity serves as an x-ray source due to electron beams.
*Work supported by the Air Force Office of Scientific Research grant # FA9550-19-1-0073.
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