{"title":"等离子体介质的关闭对行波的影响","authors":"D. Kalluri","doi":"10.1109/PLASMA.1989.165988","DOIUrl":null,"url":null,"abstract":"It is known that a sudden creation of a plasma medium of plasma frequency omega /sub p/ splits a traveling wave of frequency omega /sub 0/ into two new waves of frequencies omega /sub 1.2/=+or-( omega /sub 0//sup 2/+ omega /sub p//sup 2/)/sup 1/2/. The negative value for the frequency indicates a reflected wave. The effect of a sudden collapse of the plasma medium on a traveling wave of frequency omega /sub 0/ has been shown by the author to be the creation of two new waves of frequencies omega /sub 1.2/=+or-( omega /sub 0//sup 2/- omega /sub p//sup 2/)/sup 1/2/. These are propagating waves only if omega /sub 0/> omega /sub p/. The power in the reflected wave has a maximum of 3.7% of the power in the incident wave. The variation in the frequencies of the new waves and power carried by them with the incident wave frequency is shown. A numerical solution has been obtained for the case of a gradual collapse of the plasma medium. For the case of a slow decay of the particle density, an approximate WKB-type solution has been obtained.<<ETX>>","PeriodicalId":165717,"journal":{"name":"IEEE 1989 International Conference on Plasma Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1989-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of switching-off of a plasma medium on a traveling wave\",\"authors\":\"D. Kalluri\",\"doi\":\"10.1109/PLASMA.1989.165988\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"It is known that a sudden creation of a plasma medium of plasma frequency omega /sub p/ splits a traveling wave of frequency omega /sub 0/ into two new waves of frequencies omega /sub 1.2/=+or-( omega /sub 0//sup 2/+ omega /sub p//sup 2/)/sup 1/2/. The negative value for the frequency indicates a reflected wave. The effect of a sudden collapse of the plasma medium on a traveling wave of frequency omega /sub 0/ has been shown by the author to be the creation of two new waves of frequencies omega /sub 1.2/=+or-( omega /sub 0//sup 2/- omega /sub p//sup 2/)/sup 1/2/. These are propagating waves only if omega /sub 0/> omega /sub p/. The power in the reflected wave has a maximum of 3.7% of the power in the incident wave. The variation in the frequencies of the new waves and power carried by them with the incident wave frequency is shown. A numerical solution has been obtained for the case of a gradual collapse of the plasma medium. For the case of a slow decay of the particle density, an approximate WKB-type solution has been obtained.<<ETX>>\",\"PeriodicalId\":165717,\"journal\":{\"name\":\"IEEE 1989 International Conference on Plasma Science\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1989-05-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE 1989 International Conference on Plasma Science\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/PLASMA.1989.165988\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE 1989 International Conference on Plasma Science","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PLASMA.1989.165988","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effect of switching-off of a plasma medium on a traveling wave
It is known that a sudden creation of a plasma medium of plasma frequency omega /sub p/ splits a traveling wave of frequency omega /sub 0/ into two new waves of frequencies omega /sub 1.2/=+or-( omega /sub 0//sup 2/+ omega /sub p//sup 2/)/sup 1/2/. The negative value for the frequency indicates a reflected wave. The effect of a sudden collapse of the plasma medium on a traveling wave of frequency omega /sub 0/ has been shown by the author to be the creation of two new waves of frequencies omega /sub 1.2/=+or-( omega /sub 0//sup 2/- omega /sub p//sup 2/)/sup 1/2/. These are propagating waves only if omega /sub 0/> omega /sub p/. The power in the reflected wave has a maximum of 3.7% of the power in the incident wave. The variation in the frequencies of the new waves and power carried by them with the incident wave frequency is shown. A numerical solution has been obtained for the case of a gradual collapse of the plasma medium. For the case of a slow decay of the particle density, an approximate WKB-type solution has been obtained.<>
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