CAJ | 학술논문

讨论了电子束能散度、电子束发散度以及电子束脉冲长度等电子束参数对自由电子激光太赫兹源辐射增益的影响，并进一步考虑了波荡器真空室的约束作用，分析了其过模波导约束效应下，太赫兹辐射场与电子束纵向耦合及横向耦合的变化。结果表明，长波长时，波导约束将改善电子束的横向耦合，同时因波导效应将减慢太赫兹辐射场的传播速度有利于改善电子束的纵向耦合。通过分析饱和增长过程，优化设计了波导约束下自由电子激光太赫兹源电子束束团长度等参数。
토론료전자속능산도、전자속발산도이급전자속맥충장도등전자속삼수대자유전자격광태혁자원복사증익적영향，병진일보고필료파탕기진공실적약속작용，분석료기과모파도약속효응하，태혁자복사장여전자속종향우합급횡향우합적변화。결과표명，장파장시，파도약속장개선전자속적횡향우합，동시인파도효응장감만태혁자복사장적전파속도유리우개선전자속적종향우합。통과분석포화증장과정，우화설계료파도약속하자유전자격광태혁자원전자속속단장도등삼수。
Effects of electron beam energy spread , normalized emittance and bunch length on the gains of free‐electron laser terahertz source were discussed ,and further considering waveguide restriction of the vacuum chamber in undulator ,longitude and transverse coupling between terahertz radiation fields and the electron beams were analyzed .The results show that waveguide effects improve transverse coupling ,and as the waveguide effects slowing down the propagation velocity of terahertz wave will help to improve the longitudinal coupling .The saturation procedures of the terahertz radiation field were studied ,and the electron bunch lengths were also optimized in waveguide case .