Effect of Plasma Density on Proton Acceleration in a Rectangular Waveguide

作     者：Hitendra K.Malik 

作者机构：Department of Physics Indian Institute of Technology DelhiNew Delhi-110016Indianalytical studies are made for the proton acceleration during its motion in thefields of the fundamental mode excited by a high-intensity microwave in a rectangular waveguidewhen the proton is injected along the propagating direction of the mode. The trajectory of theproton is calculated and the expressions are obtained for the energy gain and acceleration gradienttogether with the effects of plasma density microwave frequency and waveguide width. Energygain of 181 keV is attained by a 50 keV proton in a 0.015m×0.020 m evacuated waveguide when0.5×10~(10)W/m~2 microwave intensity is used. However this gain increases to 1387 keV whenthe waveguide is filled with a plasma having a density of 1.0×10~(19) m~(-3). Higher accelerationgradients are achieved when the proton is injected with a higher initial energy and also when themicrowave intensity increases. The effects of the microwave frequency and width of the waveguideare found to decrease the acceleration gradient. 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2004年第6卷第5期

页      面：2456-2458页

核心收录：

学科分类：070207[理学-光学] 07[理学] 0702[理学-物理学] 

主　　题：proton acceleration microwave fundamental mode 

摘      要：Analytical studies are made for the proton acceleration during its motion inthe fields of the fundamental mode excited by a high-intensity microwave in a rectangular waveguide,when the proton is injected along the propagating direction of the mode. The trajectory of theproton is calculated and the expressions are obtained for the energy gain and acceleration gradienttogether with the effects of plasma density, microwave frequency and waveguide width. Energy gain of181 keV is attained by a 50 keV proton in a 0.015m x 0.020 m evacuated waveguide when 0.5 x 10^(10)W/m^2 microwave intensity is used. However, this gain increases to 1387 keV when the waveguide isfilled with a plasma having a density of 1.0 x 10^(19) m^(-3). Higher acceleration gradients areachieved when the proton is injected with a higher initial energy and also when the microwaveintensity increases. The effects of the microwave frequency and width of the waveguide are found todecrease the acceleration gradient.