(The) nonlinear effects by the ponderomotive wave in free electron laser = 자유 전자 레이저에서의 폰더로모티브 포텐셜 파에 의한 비선형 효과

We investigate the nonlinear effects due to the interactions between the reaivistic beam electrons and the ponderomotive potential wave in free electron laser. This ponderomotive potential wave comes from the beating of the wiggler magnetic field($B_w$) and the scattered electromagnetic waves($E_s,\;B_s$). We calculate the growth rate of the scattered electromagnetic waves in the relativistic electron beam frame, and again reduce the result to that in the laboratory frame. Firstly, we show that the linear growth rate($\gamma$L) obtained from the energy conservation law is same as that exactly calculated from the Vlasov-Maxwell equations. Therefore we can apply the energy conservation law to obtaining the nonlinear growth rate($\gamma$NL). In early stages(t/$\gamma\ll$1), $\gamma$NL reduced to $\gamma$L. As t/ goes to infinity the equilibrium BGK are formed in which the beam electrons, the wiggler magnetic field and a finite amplitude primary electromagnetic wave coexist in quasi-steady equilibrium.
Advisors
Choi, Duk-Inresearcher최덕인researcher
Publisher
한국과학기술원
Issue Date
1989
Identifier
66641/325007 / 000871479
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 물리학과, 1989.2, [ [ii], 49 p. ; ]

URI
http://hdl.handle.net/10203/48222
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=66641&flag=t
Appears in Collection
PH-Theses_Master(석사논문)
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