A beam-maser instability: Direct amplification of radiation
文献类型：期刊论文
| 作者 | Chen, Y. P. ; Zhou GC(周国成) ; Yoon, P. H. ; Wu, C. S. |
| 刊名 | Physics of Plasmas
 |
| 出版日期 | 2002 |
| 卷号 | 9期号:6页码:2816-2821 |
| 关键词 | electron-cyclotron maser auroral kilometric radiation loss-cone distribution weakly relativistic electrons quasi-linear diffusion synchrotron instability direct generation radio emissions solar corona frequency |
| ISSN号 | 1070-664X |
| 通讯作者 | 北京8701信箱 |
| 英文摘要 | The cyclotron maser instability has been applied in the past to laboratory microwave generation devices, and radiation from planetary magnetospheres, such as Earth's kilometric radiation and Jovian decametric radiation. Recently, the same concept was put forth to explain solar coronal radio bursts. In particular, it was suggested that the ordinary (O) mode propagating in antiparallel direction with respect to the electron beam may be important. For this reason, this article revisits the maser instability theory with a particular emphasis on understanding the key difference between forward- and backward-propagating O-mode masers. It is found that the O-mode maser instability is excited over a significant range of wave phase angle which corresponds to the backward propagation. Of the various physical parameters the average beam speed and the ratio of plasma-to-gyro-frequencies, omega(p)/Omega, play important roles. Past discussions have emphasized the role of omega(p)/Omega. The present analysis also includes the effects of average beam speed on the instability. It is shown that there is a critical beam speed for the instability onset, beyond which the growth rate is quasi-independent of the beam speed. Such a finding has not been reported in the literature before. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 原文出处 | http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PHPAEN000009000006002816000001&idtype=cvips&prog=normal |
| 语种 | 英语 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/1008]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Chen, Y. P.,Zhou GC,Yoon, P. H.,et al. A beam-maser instability: Direct amplification of radiation[J]. Physics of Plasmas,2002,9(6):2816-2821. |
| APA | Chen, Y. P.,周国成,Yoon, P. H.,&Wu, C. S..(2002).A beam-maser instability: Direct amplification of radiation.Physics of Plasmas,9(6),2816-2821. |
| MLA | Chen, Y. P.,et al."A beam-maser instability: Direct amplification of radiation".Physics of Plasmas 9.6(2002):2816-2821. |
入库方式： OAI收割
来源：国家空间科学中心
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