Comparison of Measured and Computed Radial Trajectories of Plasma Focus Devices UMDPF1 and UMDPF0
In published literature, there has been scant data on radial trajectory of the plasma focus and no comparison of computed with measured radial trajectory. This paper provides the first such comparative study. We compute the trajectories of the inward-moving radial shock and magnetic piston of UMDPF1...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing
2015
|
| Subjects: | |
| Online Access: | http://eprints.intimal.edu.my/13/ http://eprints.intimal.edu.my/13/1/Comparison%20of%20Measured%20and%20Computed%20Radial%20Trajectories%20of%20Plasma%20Focus%20Devices%20UMDPF1%20and%20UMDPF0.pdf |
| _version_ | 1848766375527448576 |
|---|---|
| author | Lim, L. H. Yap, S. L. Lim, L. K. Lee, M. C. Poh, H. S. Ma, J. Yap, S. S. |
| author_facet | Lim, L. H. Yap, S. L. Lim, L. K. Lee, M. C. Poh, H. S. Ma, J. Yap, S. S. |
| author_sort | Lim, L. H. |
| building | INTI Institutional Repository |
| collection | Online Access |
| description | In published literature, there has been scant data on radial trajectory of the plasma focus and no comparison of computed with measured radial trajectory. This paper provides the first such comparative study. We compute the trajectories of the inward-moving radial shock and magnetic piston of UMDPF1 plasma focus and compare these with measured data taken from a streak photograph. The comparison shows agreement with the measured radial trajectory in terms of average speeds and general shape of trajectory. This paper also presents the measured trajectory of the radially compressing piston in another machine, the UMDPF0 plasma focus, confirming that the computed radial trajectory also shows similar general agreement. Features of divergence between the computed and measured trajectories, towards the end of the radial compression, are discussed. From the measured radial trajectories, an inference is made that the neutron yield mechanism could not be thermonuclear. A second inference is made regarding the speeds of axial post-pinch shocks, which are recently considered as a useful tool for damage testing of fusion-related wall materials. |
| first_indexed | 2025-11-14T11:50:09Z |
| format | Article |
| id | intimal-13 |
| institution | INTI International University |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:50:09Z |
| publishDate | 2015 |
| publisher | AIP Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | intimal-132016-09-14T03:34:41Z http://eprints.intimal.edu.my/13/ Comparison of Measured and Computed Radial Trajectories of Plasma Focus Devices UMDPF1 and UMDPF0 Lim, L. H. Yap, S. L. Lim, L. K. Lee, M. C. Poh, H. S. Ma, J. Yap, S. S. QC Physics In published literature, there has been scant data on radial trajectory of the plasma focus and no comparison of computed with measured radial trajectory. This paper provides the first such comparative study. We compute the trajectories of the inward-moving radial shock and magnetic piston of UMDPF1 plasma focus and compare these with measured data taken from a streak photograph. The comparison shows agreement with the measured radial trajectory in terms of average speeds and general shape of trajectory. This paper also presents the measured trajectory of the radially compressing piston in another machine, the UMDPF0 plasma focus, confirming that the computed radial trajectory also shows similar general agreement. Features of divergence between the computed and measured trajectories, towards the end of the radial compression, are discussed. From the measured radial trajectories, an inference is made that the neutron yield mechanism could not be thermonuclear. A second inference is made regarding the speeds of axial post-pinch shocks, which are recently considered as a useful tool for damage testing of fusion-related wall materials. AIP Publishing 2015 Article PeerReviewed text en http://eprints.intimal.edu.my/13/1/Comparison%20of%20Measured%20and%20Computed%20Radial%20Trajectories%20of%20Plasma%20Focus%20Devices%20UMDPF1%20and%20UMDPF0.pdf Lim, L. H. and Yap, S. L. and Lim, L. K. and Lee, M. C. and Poh, H. S. and Ma, J. and Yap, S. S. (2015) Comparison of Measured and Computed Radial Trajectories of Plasma Focus Devices UMDPF1 and UMDPF0. Physics of Plasmas, 22 (9). ISSN 1089-7674 10.1063/1.4929856 |
| spellingShingle | QC Physics Lim, L. H. Yap, S. L. Lim, L. K. Lee, M. C. Poh, H. S. Ma, J. Yap, S. S. Comparison of Measured and Computed Radial Trajectories of Plasma Focus Devices UMDPF1 and UMDPF0 |
| title | Comparison of Measured and Computed Radial Trajectories of Plasma Focus Devices UMDPF1 and UMDPF0 |
| title_full | Comparison of Measured and Computed Radial Trajectories of Plasma Focus Devices UMDPF1 and UMDPF0 |
| title_fullStr | Comparison of Measured and Computed Radial Trajectories of Plasma Focus Devices UMDPF1 and UMDPF0 |
| title_full_unstemmed | Comparison of Measured and Computed Radial Trajectories of Plasma Focus Devices UMDPF1 and UMDPF0 |
| title_short | Comparison of Measured and Computed Radial Trajectories of Plasma Focus Devices UMDPF1 and UMDPF0 |
| title_sort | comparison of measured and computed radial trajectories of plasma focus devices umdpf1 and umdpf0 |
| topic | QC Physics |
| url | http://eprints.intimal.edu.my/13/ http://eprints.intimal.edu.my/13/ http://eprints.intimal.edu.my/13/1/Comparison%20of%20Measured%20and%20Computed%20Radial%20Trajectories%20of%20Plasma%20Focus%20Devices%20UMDPF1%20and%20UMDPF0.pdf |