Repeated Acceleration of Thermal Ions by an Oblique Shock Wave and Associated Whistler Instabilities
A magnetosonic shock wave propagating obliquely to an external magnetic field can repeatedly accelerate thermal ions if θ0≈45°, where θ0 is the angle between the wave normal and the external magnetic field. The ion energy gains in this process are theoretically analyzed, and an expression for the ma...
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| Veröffentlicht in: | Plasma and Fusion Research 2010/12/10, Vol.5, pp.S2065-S2065 |
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| container_title | Plasma and Fusion Research |
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| creator | TOIDA, Mieko GOHIRA, Taku |
| description | A magnetosonic shock wave propagating obliquely to an external magnetic field can repeatedly accelerate thermal ions if θ0≈45°, where θ0 is the angle between the wave normal and the external magnetic field. The ion energy gains in this process are theoretically analyzed, and an expression for the maximum energy is derived. This theory is verified using a two-dimensional, electromagnetic particle code. Furthermore, whistler wave instabilities generated by the accelerated ions are studied. The simulation demonstrates that whistler waves are excited in both the upstream and downstream regions, but that the whistler waves in these two regions have different frequencies and wavenumbers. It is shown that the characteristics of these waves can be explained by linear theory. |
| doi_str_mv | 10.1585/pfr.5.S2065 |
| format | Article |
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The ion energy gains in this process are theoretically analyzed, and an expression for the maximum energy is derived. This theory is verified using a two-dimensional, electromagnetic particle code. Furthermore, whistler wave instabilities generated by the accelerated ions are studied. The simulation demonstrates that whistler waves are excited in both the upstream and downstream regions, but that the whistler waves in these two regions have different frequencies and wavenumbers. 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It is shown that the characteristics of these waves can be explained by linear theory.</description><subject>collisionless shock</subject><subject>ion acceleration</subject><subject>particle simulation</subject><subject>whistler wave instability</subject><issn>1880-6821</issn><issn>1880-6821</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNpNkN9LwzAQx4MoOKdP_gN5l86kbdL0Scbwx2AguMkeyyW92MyunUkV9t9buzF8OO64-3y_HF9CbjmbcKHE_c76iZgsYybFGRlxpVgkVczP_82X5CqEDWMyF1yOSPmGO4QOSzo1Bmv00Lm2oa2lqwr9Fmo6b5tA9Z5CQ1917b6-kS6r1nzSNfxgv-2VIbTGDSbryoWud6HzJnSgXe06h-GaXFioA94c-5i8Pz2uZi_R4vV5PpsuIhPnUkQZMJ1nkqFMhIKSa6tKyblMs4ynSmrUsbR5aQQHzo02pUWEJE2sNKBUmSZjcnfwNb4NwaMtdt5twe8Lzoq_gIo-oEIUQ0A9_XCgN_2rH3hiwXfO1Hhk2VCD4nQxFfgCm-QXiGFx0A</recordid><startdate>2010</startdate><enddate>2010</enddate><creator>TOIDA, Mieko</creator><creator>GOHIRA, Taku</creator><general>The Japan Society of Plasma Science and Nuclear Fusion Research</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>2010</creationdate><title>Repeated Acceleration of Thermal Ions by an Oblique Shock Wave and Associated Whistler Instabilities</title><author>TOIDA, Mieko ; GOHIRA, Taku</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2965-7a0b9760e6358ad1bf8d61164771486beb26f9dc51a11cbcdfeea343f6ca88d43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>collisionless shock</topic><topic>ion acceleration</topic><topic>particle simulation</topic><topic>whistler wave instability</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>TOIDA, Mieko</creatorcontrib><creatorcontrib>GOHIRA, Taku</creatorcontrib><collection>CrossRef</collection><jtitle>Plasma and Fusion Research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>TOIDA, Mieko</au><au>GOHIRA, Taku</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Repeated Acceleration of Thermal Ions by an Oblique Shock Wave and Associated Whistler Instabilities</atitle><jtitle>Plasma and Fusion Research</jtitle><addtitle>Plasma and Fusion Research</addtitle><date>2010</date><risdate>2010</risdate><volume>5</volume><spage>S2065</spage><epage>S2065</epage><pages>S2065-S2065</pages><issn>1880-6821</issn><eissn>1880-6821</eissn><abstract>A magnetosonic shock wave propagating obliquely to an external magnetic field can repeatedly accelerate thermal ions if θ0≈45°, where θ0 is the angle between the wave normal and the external magnetic field. The ion energy gains in this process are theoretically analyzed, and an expression for the maximum energy is derived. This theory is verified using a two-dimensional, electromagnetic particle code. Furthermore, whistler wave instabilities generated by the accelerated ions are studied. The simulation demonstrates that whistler waves are excited in both the upstream and downstream regions, but that the whistler waves in these two regions have different frequencies and wavenumbers. It is shown that the characteristics of these waves can be explained by linear theory.</abstract><pub>The Japan Society of Plasma Science and Nuclear Fusion Research</pub><doi>10.1585/pfr.5.S2065</doi><oa>free_for_read</oa></addata></record> |
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| ispartof | Plasma and Fusion Research, 2010/12/10, Vol.5, pp.S2065-S2065 |
| issn | 1880-6821 1880-6821 |
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| source | J-STAGE (Japan Science & Technology Information Aggregator, Electronic) Freely Available Titles - Japanese; Open Access Titles of Japan; EZB-FREE-00999 freely available EZB journals |
| subjects | collisionless shock ion acceleration particle simulation whistler wave instability |
| title | Repeated Acceleration of Thermal Ions by an Oblique Shock Wave and Associated Whistler Instabilities |
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