The Madison plasma dynamo experiment: A facility for studying laboratory plasma astrophysics
The Madison plasma dynamo experiment (MPDX) is a novel, versatile, basic plasma research device designed to investigate flow driven magnetohydrodynamic instabilities and other high-β phenomena with astrophysically relevant parameters. A 3 m diameter vacuum vessel is lined with 36 rings of alternatel...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Institute of Physics (AIP)
2015
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| Online Access: | http://hdl.handle.net/1721.1/95930 https://orcid.org/0000-0002-9001-5606 |
| _version_ | 1826218167767138304 |
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| author | Cooper, C. M. Wallace, J. Brookhart, M. Clark, M. Collins, C. Ding, W. X. Flanagan, Kathryn A. Khalzov, I. Li, Y. Milhone, J. Nornberg, M. Nonn, P. Weisberg, D. Zweibel, E. Forest, C. B. Whyte, Dennis G. |
| author2 | Massachusetts Institute of Technology. Plasma Science and Fusion Center |
| author_facet | Massachusetts Institute of Technology. Plasma Science and Fusion Center Cooper, C. M. Wallace, J. Brookhart, M. Clark, M. Collins, C. Ding, W. X. Flanagan, Kathryn A. Khalzov, I. Li, Y. Milhone, J. Nornberg, M. Nonn, P. Weisberg, D. Zweibel, E. Forest, C. B. Whyte, Dennis G. |
| author_sort | Cooper, C. M. |
| collection | MIT |
| description | The Madison plasma dynamo experiment (MPDX) is a novel, versatile, basic plasma research device designed to investigate flow driven magnetohydrodynamic instabilities and other high-β phenomena with astrophysically relevant parameters. A 3 m diameter vacuum vessel is lined with 36 rings of alternately oriented 4000 G samarium cobalt magnets, which create an axisymmetric multicusp that contains ∼14 m[superscript 3] of nearly magnetic field free plasma that is well confined and highly ionized (>50%). At present, 8 lanthanum hexaboride (LaB[subscript 6]) cathodes and 10 molybdenum anodes are inserted into the vessel and biased up to 500 V, drawing 40 A each cathode, ionizing a low pressure Ar or He fill gas and heating it. Up to 100 kW of electron cyclotron heating power is planned for additional electron heating. The LaB[subscript 6] cathodes are positioned in the magnetized edge to drive toroidal rotation through J × B torques that propagate into the unmagnetized core plasma. Dynamo studies on MPDX require a high magnetic Reynolds number Rm > 1000, and an adjustable fluid Reynolds number 10 < Re < 1000, in the regime where the kinetic energy of the flow exceeds the magnetic energy ( M[2 over A]=([v over v[subscript A])[superscript 2] > 1). Initial results from MPDX are presented along with a 0-dimensional power and particle balance model to predict the viscosity and resistivity to achieve dynamo action. |
| first_indexed | 2024-09-23T17:15:34Z |
| format | Article |
| id | mit-1721.1/95930 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T17:15:34Z |
| publishDate | 2015 |
| publisher | American Institute of Physics (AIP) |
| record_format | dspace |
| spelling | mit-1721.1/959302022-09-30T00:44:15Z The Madison plasma dynamo experiment: A facility for studying laboratory plasma astrophysics Cooper, C. M. Wallace, J. Brookhart, M. Clark, M. Collins, C. Ding, W. X. Flanagan, Kathryn A. Khalzov, I. Li, Y. Milhone, J. Nornberg, M. Nonn, P. Weisberg, D. Zweibel, E. Forest, C. B. Whyte, Dennis G. Massachusetts Institute of Technology. Plasma Science and Fusion Center Whyte, Dennis G. The Madison plasma dynamo experiment (MPDX) is a novel, versatile, basic plasma research device designed to investigate flow driven magnetohydrodynamic instabilities and other high-β phenomena with astrophysically relevant parameters. A 3 m diameter vacuum vessel is lined with 36 rings of alternately oriented 4000 G samarium cobalt magnets, which create an axisymmetric multicusp that contains ∼14 m[superscript 3] of nearly magnetic field free plasma that is well confined and highly ionized (>50%). At present, 8 lanthanum hexaboride (LaB[subscript 6]) cathodes and 10 molybdenum anodes are inserted into the vessel and biased up to 500 V, drawing 40 A each cathode, ionizing a low pressure Ar or He fill gas and heating it. Up to 100 kW of electron cyclotron heating power is planned for additional electron heating. The LaB[subscript 6] cathodes are positioned in the magnetized edge to drive toroidal rotation through J × B torques that propagate into the unmagnetized core plasma. Dynamo studies on MPDX require a high magnetic Reynolds number Rm > 1000, and an adjustable fluid Reynolds number 10 < Re < 1000, in the regime where the kinetic energy of the flow exceeds the magnetic energy ( M[2 over A]=([v over v[subscript A])[superscript 2] > 1). Initial results from MPDX are presented along with a 0-dimensional power and particle balance model to predict the viscosity and resistivity to achieve dynamo action. National Science Foundation (U.S.) (Award PHY 0923258) National Science Foundation (U.S.) (Award PHY 0821899) United States. Dept. of Energy (Award DE-SC0008709) United States. American Recovery and Reinvestment Act of 2009. Major Research Instrumentation Program Center for Magnetic Self Organization in Laboratory and Astrophysical Plasmas 2015-03-10T16:41:49Z 2015-03-10T16:41:49Z 2014-01 2013-10 Article http://purl.org/eprint/type/JournalArticle 1070-664X 1089-7674 http://hdl.handle.net/1721.1/95930 Cooper, C. M., J. Wallace, M. Brookhart, M. Clark, C. Collins, W. X. Ding, K. Flanagan, et al. “The Madison Plasma Dynamo Experiment: A Facility for Studying Laboratory Plasma Astrophysics.” Phys. Plasmas 21, no. 1 (January 2014): 013505. © 2014 AIP Publishing LLC https://orcid.org/0000-0002-9001-5606 en_US http://dx.doi.org/10.1063/1.4861609 Physics of Plasmas Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Institute of Physics (AIP) Other univ. web domain |
| spellingShingle | Cooper, C. M. Wallace, J. Brookhart, M. Clark, M. Collins, C. Ding, W. X. Flanagan, Kathryn A. Khalzov, I. Li, Y. Milhone, J. Nornberg, M. Nonn, P. Weisberg, D. Zweibel, E. Forest, C. B. Whyte, Dennis G. The Madison plasma dynamo experiment: A facility for studying laboratory plasma astrophysics |
| title | The Madison plasma dynamo experiment: A facility for studying laboratory plasma astrophysics |
| title_full | The Madison plasma dynamo experiment: A facility for studying laboratory plasma astrophysics |
| title_fullStr | The Madison plasma dynamo experiment: A facility for studying laboratory plasma astrophysics |
| title_full_unstemmed | The Madison plasma dynamo experiment: A facility for studying laboratory plasma astrophysics |
| title_short | The Madison plasma dynamo experiment: A facility for studying laboratory plasma astrophysics |
| title_sort | madison plasma dynamo experiment a facility for studying laboratory plasma astrophysics |
| url | http://hdl.handle.net/1721.1/95930 https://orcid.org/0000-0002-9001-5606 |
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