Temporal evolution of electron beam generated Argon plasma in pasotron device

International Conference on Recent Trends in Physics 2016

Khandelwal, Neha^1 ; Pal, U.N.^1 ; Prakash, Ram^2 ; Choyal, Y.^1

School of Physics, Devi Ahilya University, Indore (M.P.), India^1

Microwave Tube Division, CSIR-Central Electronics Engineering Research Institute, Pilani (Raj.), India^2

关键词: Electron-beam-generated plasmas;    Electron-impact excitation;    High power microwave sources;    Interaction region;    Plasma assisted slow wave oscillators;    Radiative recombination;    Temporal evolution;    Three-body recombination;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/755/1/012052/pdf
DOI  :  10.1088/1742-6596/755/1/012052

来源: IOP

【 摘 要 】

The plasma- assisted slow wave oscillator (PASOTRON) is a high power microwave source in which the electron beam in the interaction region is confined by the background plasma. The plasma is generated by impact ionization of background gas with the electron beam. A model has been developed for temporal evolution of Argon plasma in pasotron device. In this model, we consider electron beam of energy E interacting with Argon gas. The resulting ionization creates quasi neutral argon plasma composed of argon Ar atoms, singly ionized ions Ar+1and electrons having energy from 0 to E. Electron impact excitation, ionization, radiative decay, radiative recombination and three body recombination processes are considered in this model. Population of ground and excited states of argon atom, ground state of argon ion as well as the population of electron energy groups is calculated by solving time dependent rate equations. Temporal evolution of electron beam generated plasma is given.