S - superradiance 中文 - EN166

superradiance n.【物理學】超發光。

superradiation
The linear and nonlinear optical properties of these compounds have been systematically studied . the following parts are included in this thesis : one - photon and two - photon fluorescence ; upconversion superradiance and cavity lasing properties ; the optical power limiting effect of these compounds ; and so on . tpa absorption coefficients have been got by z - scan method 3 、系統研究了它們的線性和非線性光學性質，主要包括：單、雙光子熒光，上轉換超輻射和腔激射性能及其效率，光限幅效應，用z - scan的方法得到了其雙光子吸收截面。
Using the particle - in - cell ( pic ) model , a 8 millimeter relativistic backward wave oscillator underlying superradiance mechanism was gotten , the influence on both operation frequency and radiation efficiency of the guiding magnetic field , the diode voltage , the beam current and the beam radius as well as the corrugation structure were also presented 采用pic方法，通過數值模擬優化設計了超輻射狀態下的8毫米相對論返波振蕩器，分析了引導磁場、二極管電壓、電子束流、電子束半徑、周期慢波結構等對器件的輻射功率及輻射效率的影響。
Subnanosecond millimeter relativistic backward wave oscillator , based on superradiance mechanism , was a novelty microwave device developed in last few years . the dependence of peak power on the square of the density of electron beam is almost linear 基于超輻射機理的亞納秒毫米波微波器件是近幾年發展起來的一種新型微波器件，其輻射功率與參與束波互作用的電子束密度的平方成正比關系。
In the first chapter , the high power microwave device development process was reviewed , the physical mechanisms underlying superradiance phenomenon based on cherenkov radiation expounded and the research activities in this field , both in and out of china , summarized 首先簡述了高功率微波器件的發展歷程和切倫柯夫超輻射機理，比較詳細介紹了國內外在這一領域的研究狀況。
With the theory analysis of the superradiance mechanism its condition that occurs from the . foundation . can be understood clearly 通過理論研究，能較深刻的解釋其發生的條件和物理意義并對實驗有一定的指導作用。
The basic condition that produced superradiance and the radiation power were gotten 推導出產生超輻射機理的基本條件，并得到了微波輻射功率的解析表達式。