Plasma resistivity profile measurement from an external radio-frequency magnetic coil
Plasma resistivity is obtained by measuring the change in circuit behavior from a simple loop placed externally to the plasma. The loop is part of a series-driven oscillator that can be tuned over a wide range of frequencies with a very low internal impedance. By varying the frequency, and observing...
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| Veröffentlicht in: | Review of Scientific Instruments 2004-10, Vol.75 (10), p.3807-3809 |
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| container_title | Review of Scientific Instruments |
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| creator | Slough, John T. Andreason, Samuel P. Milroy, Richard D. |
| description | Plasma resistivity is obtained by measuring the change in circuit behavior from a simple loop placed externally to the plasma. The loop is part of a series-driven oscillator that can be tuned over a wide range of frequencies with a very low internal impedance. By varying the frequency, and observing both the detuning and loading of this circuit, the location and resistance of the screening currents can be determined. A two-dimensional resistive magnetohydrodynamic code calculation is performed to obtain both the plasma interaction with the oscillating field as well as the effects of nearby conductors. The plasma resistance in the numerical calculations is adjusted to match the data from the experiment and, in this way, obtain a measure of the plasma resistivity profile. |
| doi_str_mv | 10.1063/1.1783602 |
| format | Article |
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The loop is part of a series-driven oscillator that can be tuned over a wide range of frequencies with a very low internal impedance. By varying the frequency, and observing both the detuning and loading of this circuit, the location and resistance of the screening currents can be determined. A two-dimensional resistive magnetohydrodynamic code calculation is performed to obtain both the plasma interaction with the oscillating field as well as the effects of nearby conductors. 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The loop is part of a series-driven oscillator that can be tuned over a wide range of frequencies with a very low internal impedance. By varying the frequency, and observing both the detuning and loading of this circuit, the location and resistance of the screening currents can be determined. A two-dimensional resistive magnetohydrodynamic code calculation is performed to obtain both the plasma interaction with the oscillating field as well as the effects of nearby conductors. The plasma resistance in the numerical calculations is adjusted to match the data from the experiment and, in this way, obtain a measure of the plasma resistivity profile.</description><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</subject><subject>ELECTRIC IMPEDANCE</subject><subject>MAGNET COILS</subject><subject>MAGNETOHYDRODYNAMICS</subject><subject>OSCILLATORS</subject><subject>PLASMA</subject><subject>PLASMA DIAGNOSTICS</subject><subject>RADIOWAVE RADIATION</subject><issn>0034-6748</issn><issn>1089-7623</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNp90EtLAzEUBeAgCtbHwn8QcKUwNY_JZGYpxRcUdGHXIZO50chMUpO02H_vlBZdCN7N3XwcDgehC0qmlFT8hk6prHlF2AGaUFI3hawYP0QTQnhZVLKsj9FJSh9kPEHpBC1eep0GjSMkl7Jbu7zByxis6wEPoNMqwgA-YxvDgLXH8JUhet3jqDsXChvhcwXebPCg3zxkZ7AJrj9DR1b3Cc73_xQt7u9eZ4_F_PnhaXY7LwxnIheamFYb0tQt4ay1grWN7WxdNmXJoAbZyBIaXdXEtoQ1wopOcyM0EaxjxErJT9HlLjeM3VUyLoN5N8F7MFmxcY9KimpUVztlYkgpglXL6AYdN4oStV1NUbVfbbTXO7sN09kF_4PXIf5Ctezsf_hv8jfes3wX</recordid><startdate>200410</startdate><enddate>200410</enddate><creator>Slough, John T.</creator><creator>Andreason, Samuel P.</creator><creator>Milroy, Richard D.</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>200410</creationdate><title>Plasma resistivity profile measurement from an external radio-frequency magnetic coil</title><author>Slough, John T. ; Andreason, Samuel P. ; Milroy, Richard D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c325t-a0cbac098b032bf52b9fdf849442e8e7974e9a680fb0295f5da3c5a052d20f773</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</topic><topic>ELECTRIC IMPEDANCE</topic><topic>MAGNET COILS</topic><topic>MAGNETOHYDRODYNAMICS</topic><topic>OSCILLATORS</topic><topic>PLASMA</topic><topic>PLASMA DIAGNOSTICS</topic><topic>RADIOWAVE RADIATION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Slough, John T.</creatorcontrib><creatorcontrib>Andreason, Samuel P.</creatorcontrib><creatorcontrib>Milroy, Richard D.</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Review of Scientific Instruments</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Slough, John T.</au><au>Andreason, Samuel P.</au><au>Milroy, Richard D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Plasma resistivity profile measurement from an external radio-frequency magnetic coil</atitle><jtitle>Review of Scientific Instruments</jtitle><date>2004-10</date><risdate>2004</risdate><volume>75</volume><issue>10</issue><spage>3807</spage><epage>3809</epage><pages>3807-3809</pages><issn>0034-6748</issn><eissn>1089-7623</eissn><coden>RSINAK</coden><abstract>Plasma resistivity is obtained by measuring the change in circuit behavior from a simple loop placed externally to the plasma. The loop is part of a series-driven oscillator that can be tuned over a wide range of frequencies with a very low internal impedance. By varying the frequency, and observing both the detuning and loading of this circuit, the location and resistance of the screening currents can be determined. A two-dimensional resistive magnetohydrodynamic code calculation is performed to obtain both the plasma interaction with the oscillating field as well as the effects of nearby conductors. The plasma resistance in the numerical calculations is adjusted to match the data from the experiment and, in this way, obtain a measure of the plasma resistivity profile.</abstract><cop>United States</cop><doi>10.1063/1.1783602</doi><tpages>3</tpages></addata></record> |
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| ispartof | Review of Scientific Instruments, 2004-10, Vol.75 (10), p.3807-3809 |
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| source | American Institute of Physics; AIP Digital Archive |
| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY ELECTRIC IMPEDANCE MAGNET COILS MAGNETOHYDRODYNAMICS OSCILLATORS PLASMA PLASMA DIAGNOSTICS RADIOWAVE RADIATION |
| title | Plasma resistivity profile measurement from an external radio-frequency magnetic coil |
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