Effect of solenoidal magnetic field on drifting laser plasma
An ion source for accelerators requires to provide a stable waveform with a certain pulse length appropriate to the application. The pulse length of laser ion source is easy to control because it is expected to be proportional to plasma drifting distance. However, current density decay is proportion...
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| Veröffentlicht in: | AIP conference proceedings 2013-04, Vol.1525 (1) |
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| creator | Takahashi, Kazumasa Okamura, Masahiro Sekine, Megumi Cushing, Eric Jandovitz, Peter |
| description | An ion source for accelerators requires to provide a stable waveform with a certain pulse length appropriate to the application. The pulse length of laser ion source is easy to control because it is expected to be proportional to plasma drifting distance. However, current density decay is proportional to the cube of the drifting distance, so large current loss will occur under unconfined drift. We investigated the stability and current decay of a Nd:YAG laser generated copper plasma confined by a solenoidal field using a Faraday cup to measure the current waveform. It was found that the plasma was unstable at certain magnetic field strengths, so a baffle was introduced to limit the plasma diameter at injection and improve the stability. Magnetic field, solenoid length, and plasma diameter were varied in order to find the conditions that minimize current decay and maximize stability. |
| doi_str_mv | 10.1063/1.4802327 |
| format | Article |
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The pulse length of laser ion source is easy to control because it is expected to be proportional to plasma drifting distance. However, current density decay is proportional to the cube of the drifting distance, so large current loss will occur under unconfined drift. We investigated the stability and current decay of a Nd:YAG laser generated copper plasma confined by a solenoidal field using a Faraday cup to measure the current waveform. It was found that the plasma was unstable at certain magnetic field strengths, so a baffle was introduced to limit the plasma diameter at injection and improve the stability. 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The pulse length of laser ion source is easy to control because it is expected to be proportional to plasma drifting distance. However, current density decay is proportional to the cube of the drifting distance, so large current loss will occur under unconfined drift. We investigated the stability and current decay of a Nd:YAG laser generated copper plasma confined by a solenoidal field using a Faraday cup to measure the current waveform. It was found that the plasma was unstable at certain magnetic field strengths, so a baffle was introduced to limit the plasma diameter at injection and improve the stability. Magnetic field, solenoid length, and plasma diameter were varied in order to find the conditions that minimize current decay and maximize stability.</description><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</subject><subject>ACCELERATORS</subject><subject>COPPER</subject><subject>CURRENT DENSITY</subject><subject>Decay</subject><subject>Drift</subject><subject>ELECTRIC CURRENTS</subject><subject>FARADAY CUPS</subject><subject>ION SOURCES</subject><subject>Lasers</subject><subject>MAGNETIC FIELDS</subject><subject>NEODYMIUM LASERS</subject><subject>PARTICLE ACCELERATORS</subject><subject>PLASMA DIAGNOSTICS</subject><subject>PLASMA DRIFT</subject><subject>PLASMA INSTABILITY</subject><subject>PLASMA PRODUCTION</subject><subject>Stability</subject><subject>WAVE FORMS</subject><subject>Waveforms</subject><issn>0094-243X</issn><issn>1551-7616</issn><isbn>9780735411487</isbn><isbn>0735411484</isbn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNotjjtPwzAURi0eElXpwD-wxMKScq_t2LHEgqrykCqxdGCLHOe6GKVxid3_T0WZznL0nY-xO4QlgpaPuFQNCCnMBZthXWNlNOpLtrCmASNrhagac8VmAFZVQsnPG7bI-RsABEghLMzY0zoE8oWnwHMaaEyxdwPfu91IJXoeIg09TyPvpxhKHHd8cJkmfjhh727ZdXBDpsU_52z7st6u3qrNx-v76nlT-VOlVLZBa7wRXe-w08oG25GlIDw1DgO6XnkQaBBqJ7ADFYKWjqgJutdK13LO7s-zKZfYZh8L-S-fxvF0vBUCUds_6-FsHab0c6Rc2n3MnobBjZSOuUWtAWStDcpfHA9ZXw</recordid><startdate>20130419</startdate><enddate>20130419</enddate><creator>Takahashi, Kazumasa</creator><creator>Okamura, Masahiro</creator><creator>Sekine, Megumi</creator><creator>Cushing, Eric</creator><creator>Jandovitz, Peter</creator><scope>7SP</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20130419</creationdate><title>Effect of solenoidal magnetic field on drifting laser plasma</title><author>Takahashi, Kazumasa ; Okamura, Masahiro ; Sekine, Megumi ; Cushing, Eric ; Jandovitz, Peter</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c322t-98197c72bda1b649f9be9ef2ce8a1f1ad4c0217105a21b04ff63aee8f6d64653</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</topic><topic>ACCELERATORS</topic><topic>COPPER</topic><topic>CURRENT DENSITY</topic><topic>Decay</topic><topic>Drift</topic><topic>ELECTRIC CURRENTS</topic><topic>FARADAY CUPS</topic><topic>ION SOURCES</topic><topic>Lasers</topic><topic>MAGNETIC FIELDS</topic><topic>NEODYMIUM LASERS</topic><topic>PARTICLE ACCELERATORS</topic><topic>PLASMA DIAGNOSTICS</topic><topic>PLASMA DRIFT</topic><topic>PLASMA INSTABILITY</topic><topic>PLASMA PRODUCTION</topic><topic>Stability</topic><topic>WAVE FORMS</topic><topic>Waveforms</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Takahashi, Kazumasa</creatorcontrib><creatorcontrib>Okamura, Masahiro</creatorcontrib><creatorcontrib>Sekine, Megumi</creatorcontrib><creatorcontrib>Cushing, Eric</creatorcontrib><creatorcontrib>Jandovitz, Peter</creatorcontrib><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>AIP conference proceedings</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Takahashi, Kazumasa</au><au>Okamura, Masahiro</au><au>Sekine, Megumi</au><au>Cushing, Eric</au><au>Jandovitz, Peter</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of solenoidal magnetic field on drifting laser plasma</atitle><jtitle>AIP conference proceedings</jtitle><date>2013-04-19</date><risdate>2013</risdate><volume>1525</volume><issue>1</issue><issn>0094-243X</issn><eissn>1551-7616</eissn><isbn>9780735411487</isbn><isbn>0735411484</isbn><abstract>An ion source for accelerators requires to provide a stable waveform with a certain pulse length appropriate to the application. The pulse length of laser ion source is easy to control because it is expected to be proportional to plasma drifting distance. However, current density decay is proportional to the cube of the drifting distance, so large current loss will occur under unconfined drift. We investigated the stability and current decay of a Nd:YAG laser generated copper plasma confined by a solenoidal field using a Faraday cup to measure the current waveform. It was found that the plasma was unstable at certain magnetic field strengths, so a baffle was introduced to limit the plasma diameter at injection and improve the stability. Magnetic field, solenoid length, and plasma diameter were varied in order to find the conditions that minimize current decay and maximize stability.</abstract><cop>United States</cop><doi>10.1063/1.4802327</doi></addata></record> |
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| ispartof | AIP conference proceedings, 2013-04, Vol.1525 (1) |
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| source | Scitation (American Institute of Physics) |
| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY ACCELERATORS COPPER CURRENT DENSITY Decay Drift ELECTRIC CURRENTS FARADAY CUPS ION SOURCES Lasers MAGNETIC FIELDS NEODYMIUM LASERS PARTICLE ACCELERATORS PLASMA DIAGNOSTICS PLASMA DRIFT PLASMA INSTABILITY PLASMA PRODUCTION Stability WAVE FORMS Waveforms |
| title | Effect of solenoidal magnetic field on drifting laser plasma |
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