Upper hybrid wave pumped free electron laser

Journal Article · Tue Aug 01 00:00:00 EDT 1995 · IEEE Transactions on Plasma Science

DOI:https://doi.org/10.1109/27.468002· OSTI ID:118927

Sharma, S C; Tripathi, V K ^[1]

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1. Indian Inst. of Tech., New Delhi (India). Dept. of Physics

A large upper hybrid wave has potential to be employed as a wiggler for the generation of high frequency coherent radiation via free electron laser (FEL) instability. At a density fluctuation level of a few percent, due to the upper hybrid wave, the growth time of FEL instability, with electron beam current of a few kilo ampere, turns out to be of the order of a nanosecond. The growth rate of FEL instability depends sensitively on {omega}{sub 1} and this dependence comes through v{sub osc}, the beam oscillatory velocity. However, this scheme of FEL operating suffers from a severe limitation due to the parametric instability of the upper hybrid wave. The process of parametric decay into lower hybrid and upper hybrid waves may have growth rate comparable to that of the FEL instability.

• OSTI ID: 118927
• Journal Information: IEEE Transactions on Plasma Science, Vol. 23, Issue 4; Other Information: PBD: Aug 1995
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
FREE ELECTRON LASERS
WIGGLER MAGNETS
OPERATION
INSTABILITY GROWTH RATES
PLASMA WAVES
PARAMETRIC INSTABILITIES
DECAY INSTABILITY