Axial mass fraction measurements in a 300kA dense plasma focus

Caballero Bendixsen, L. S.; Bott-Suzuki, S. C.; Cordaro, S. W.; Krishnan, M.; Chapman, S.; Coleman, P.; Chittenden, J.

doi:10.1063/1.4962679

Title: Axial mass fraction measurements in a 300kA dense plasma focus

Journal Article · Fri Sep 16 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4962679· OSTI ID:1467900

Caballero Bendixsen, L. S. ^[1]; Bott-Suzuki, S. C. ^[1]; Cordaro, S. W. ^[1]; Krishnan, M. ^[2]; Chapman, S. ^[2];

^[3]; Chittenden, J. ^[4]

Univ. of California, San Diego, CA (United States). Center for Energy Research
Alameda Applied Sciences Corporation, San Leandro, CA (United States)
Evergreen Hill Sciences, Philomath, OR (United States)
Imperial College London, South Kensington, London (United Kingdom)

The dynamics and characteristics of the plasma sheath during the axial phase in a ~300 kA, ~2 kJ dense plasma focus using a static gas load of Ne at 1–4 Torr are reported. The sheath, which is driven axially at a constant velocity ~10⁵ m/s by the j × B force, is observed using optical imaging, to form an acute angle between the electrodes. This angle becomes more acute (more parallel to the axis) along the rundown. The average sheath thickness nearer the anode is 0.69 ± 0.02 mm and nearer the cathode is 0.95 ± 0.02 mm. The sheath total mass increases from 1 ± 0.02 μg to 6 ± 0.02 μg over the pressure range of 1–4 Torr. However, the mass fraction (defined as the sheath mass/total mass of cold gas between the electrodes) decreases from 7% to 5%. In addition, the steeper the plasma sheath, the more mass is lost from the sheath, which is consistent with radial and axial motion. Lastly, experimental results are compared to the Lee code when 100% of the current drives the axial and radial phase.

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Research Organization:: Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0010751

OSTI ID:: 1467900

Alternate ID(s):: OSTI ID: 1325303

Journal Information:: Physics of Plasmas, Vol. 23, Issue 9; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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References (15)

A Plasma Focus Electronic Neutron Generator Bures, Brian L.; Krishnan, Mahadevan; James, Colt IEEE Transactions on Plasma Science, Vol. 40, Issue 4 https://doi.org/10.1109/TPS.2012.2183648	journal	April 2012
Computing plasma focus pinch current from total current measurement Lee, S.; Saw, S. H.; Lee, P. C. K. Applied Physics Letters, Vol. 92, Issue 11 https://doi.org/10.1063/1.2899632	journal	March 2008
Plasma sheath kinematics and some implications on the modeling of very low energy plasma focus devices Veloso, Felipe; Tarifeño-Saldivia, Ariel; Pavez, Cristian Plasma Physics and Controlled Fusion, Vol. 54, Issue 9 https://doi.org/10.1088/0741-3335/54/9/095007	journal	July 2012
Current Sheath Dynamics and its Evolution Studies in Sahand Filippov Type Plasma Focus Mohammadi, M. A.; Sobhanian, S.; Ghomeishi, M. Journal of Fusion Energy, Vol. 28, Issue 4 https://doi.org/10.1007/s10894-009-9205-2	journal	May 2009
Quantitative x‐ray emission from a DPF device Burkhalter, P. G.; Mehlman, G.; Newman, D. A. Review of Scientific Instruments, Vol. 63, Issue 10 https://doi.org/10.1063/1.1143489	journal	October 1992
Relationship Between Neutron Yield and Macroscale Pinch Dynamics of a 1.4-kJ Plasma Focus Over Hundreds of Pulses Bures, Brian L.; Krishnan, Mahadevan; Madden, Robert E. IEEE Transactions on Plasma Science, Vol. 39, Issue 12 https://doi.org/10.1109/TPS.2011.2170588	journal	December 2011
Space and time resolved electron density and current measurements in a dense plasma focus Z-pinch IEEE Transactions on Plasma Science, Vol. 26, Issue 4 https://doi.org/10.1109/27.725142	journal	January 1998
Investigation of the High-Energy Acceleration Mode in the Coaxial Gun Mather, J. W. Physics of Fluids, Vol. 7, Issue 11 https://doi.org/10.1063/1.1711086	journal	January 1964
The Dense Plasma Focus: A Versatile Dense Pinch for Diverse Applications Krishnan, Mahadevan IEEE Transactions on Plasma Science, Vol. 40, Issue 12 https://doi.org/10.1109/TPS.2012.2222676	journal	December 2012
Plasma Focus Radiative Model: Review of the Lee Model Code Lee, S. Journal of Fusion Energy, Vol. 33, Issue 4 https://doi.org/10.1007/s10894-014-9683-8	journal	March 2014
Numerical Studies of the Plasma Focus Potter, D. E. Physics of Fluids, Vol. 14, Issue 9 https://doi.org/10.1063/1.1693700	journal	January 1971
Non-intrusive plasma diagnostics for measuring sheath kinematics in plasma focus discharges Veloso, Felipe; Moreno, José; Tarifeño-Saldivia, Ariel Measurement Science and Technology, Vol. 23, Issue 8 https://doi.org/10.1088/0957-0233/23/8/087002	journal	June 2012
Particle beams generated by a 6–12.5 kJ dense plasma focus Stygar, W.; Gerdin, G.; Venneri, F. Nuclear Fusion, Vol. 22, Issue 9 https://doi.org/10.1088/0029-5515/22/9/003	journal	September 1982
Characterization of the axial plasma shock in a table top plasma focus after the pinch and its possible application to testing materials for fusion reactors Soto, Leopoldo; Pavez, Cristian; Moreno, José Physics of Plasmas, Vol. 21, Issue 12 https://doi.org/10.1063/1.4903471	journal	December 2014
Principles of Plasma Physics Krall, Nicholas A.; Trivelpiece, Alvin W.; Gross, Robert A. American Journal of Physics, Vol. 41, Issue 12 https://doi.org/10.1119/1.1987587	journal	December 1973

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Current sheet characteristics of a parallel-plate electromagnetic plasma accelerator operated in gas-prefilled mode Liu, Shuai; Huang, Yizhi; Guo, Haishan Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5004115	journal	May 2018
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