Forces on a small grain in the nonlinear plasma wake of another
The transverse force on a spherical charged grain lying in the plasma wake of another grain is analyzed to assess the importance of ion-drag perturbation, in addition to the wake-potential-gradient. The ion-drag perturbation is intrinsically one order smaller than the wake-potential force in the rat...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2011
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| Online Access: | http://hdl.handle.net/1721.1/65937 |
| _version_ | 1826190916327571456 |
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| author | Hutchinson, Ian Horner |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Hutchinson, Ian Horner |
| author_sort | Hutchinson, Ian Horner |
| collection | MIT |
| description | The transverse force on a spherical charged grain lying in the plasma wake of another grain is analyzed to assess the importance of ion-drag perturbation, in addition to the wake-potential-gradient. The ion-drag perturbation is intrinsically one order smaller than the wake-potential force in the ratio of grain size (rp) to Debye length (lambdaDe). So ion-drag perturbation is important only in nonlinear wakes. Rigorous particle-in-cell calculations of the force are performed in the nonlinear regime with two interacting grains. It is found that even for quite large grains, rp/lambdaDe=0.1, the force is dominated by the wake-potential gradient. The wake-potential structure can then help explain the preferred alignment of floating dust grains. |
| first_indexed | 2024-09-23T08:47:35Z |
| format | Article |
| id | mit-1721.1/65937 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:47:35Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/659372023-02-26T02:06:24Z Forces on a small grain in the nonlinear plasma wake of another Hutchinson, Ian Horner Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Massachusetts Institute of Technology. Plasma Science and Fusion Center Hutchinson, Ian H. Hutchinson, Ian H. The transverse force on a spherical charged grain lying in the plasma wake of another grain is analyzed to assess the importance of ion-drag perturbation, in addition to the wake-potential-gradient. The ion-drag perturbation is intrinsically one order smaller than the wake-potential force in the ratio of grain size (rp) to Debye length (lambdaDe). So ion-drag perturbation is important only in nonlinear wakes. Rigorous particle-in-cell calculations of the force are performed in the nonlinear regime with two interacting grains. It is found that even for quite large grains, rp/lambdaDe=0.1, the force is dominated by the wake-potential gradient. The wake-potential structure can then help explain the preferred alignment of floating dust grains. National Science Foundation (U.S.) (NSF/DOE Grant DE-FG02-06ER54982) 2011-09-22T15:20:25Z 2011-09-22T15:20:25Z 2011-08 2011-05 Article http://purl.org/eprint/type/JournalArticle 0031-9007 http://hdl.handle.net/1721.1/65937 Hutchinson, I. H. "Forces on a small grain in the nonlinear plasma wake of another." Physical Review Letters, 107, 095001 (2011) © 2011 American Physical Society. en_US http://prl.aps.org/abstract/PRL/v107/i9/e095001 Physical Review Letters Creative Commons Attribution-Noncommercial-Share Alike 3.0 http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf American Physical Society Prof. Ian Hutchinson |
| spellingShingle | Hutchinson, Ian Horner Forces on a small grain in the nonlinear plasma wake of another |
| title | Forces on a small grain in the nonlinear plasma wake of another |
| title_full | Forces on a small grain in the nonlinear plasma wake of another |
| title_fullStr | Forces on a small grain in the nonlinear plasma wake of another |
| title_full_unstemmed | Forces on a small grain in the nonlinear plasma wake of another |
| title_short | Forces on a small grain in the nonlinear plasma wake of another |
| title_sort | forces on a small grain in the nonlinear plasma wake of another |
| url | http://hdl.handle.net/1721.1/65937 |
| work_keys_str_mv | AT hutchinsonianhorner forcesonasmallgraininthenonlinearplasmawakeofanother |