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基于轨道控制的FEL圆偏振辐射的产生与空间分离

易怀千 王晓凡 张未卿

易怀千, 王晓凡, 张未卿. 基于轨道控制的FEL圆偏振辐射的产生与空间分离[J]. 强激光与粒子束, 2024, 36: 071003. doi: 10.11884/HPLPB202436.240082
引用本文: 易怀千, 王晓凡, 张未卿. 基于轨道控制的FEL圆偏振辐射的产生与空间分离[J]. 强激光与粒子束, 2024, 36: 071003. doi: 10.11884/HPLPB202436.240082
Yi Huaiqian, Wang Xiaofan, Zhang Weiqing. Generation and spatial separation of circular polarized FEL radiations by orbit control[J]. High Power Laser and Particle Beams, 2024, 36: 071003. doi: 10.11884/HPLPB202436.240082
Citation: Yi Huaiqian, Wang Xiaofan, Zhang Weiqing. Generation and spatial separation of circular polarized FEL radiations by orbit control[J]. High Power Laser and Particle Beams, 2024, 36: 071003. doi: 10.11884/HPLPB202436.240082

基于轨道控制的FEL圆偏振辐射的产生与空间分离

doi: 10.11884/HPLPB202436.240082
基金项目: 中国科学院科研仪器设备研制项目(GJJSTD20220001); 国家自然科学基金项目(22288201)
详细信息
    作者简介:

    易怀千,yihuaiqian@mail.iasf.ac.cn

    通讯作者:

    王晓凡,wangxf@mail.iasf.ac.cn

    张未卿,weiqingzhang@dicp.ac.cn

  • 中图分类号: TN248.6

Generation and spatial separation of circular polarized FEL radiations by orbit control

  • 摘要: 研究了在自由电子激光设施中产生高偏振度圆偏振辐射的技术方案。该方案将工作在反向渐变模式的平面波荡器和常规椭圆极化波荡器以前后连接的方式进行排布,并通过波荡器之间的矫正磁铁对电子束进行轨道控制。在平面波荡器部分利用偏转磁铁使电子束偏向传输,所产生线偏振辐射也将偏轴传播,脉冲能量为0.357 ${\text{μJ}}$。在进入椭圆极化波荡器之前校正电子束的轨道和前进方向,使得带有微群聚结构的电子束沿轴线正向传输,其产生的圆偏振辐射能量为92.39 ${\text{μJ}}$。圆偏振辐射将沿轴向传输,在一定距离后可实现其与线偏振辐射在空间上的分离。通过数值模拟分析了电子束偏转对辐射光性质所产生的影响。
  • 图  1  用于产生圆偏振辐射的波荡器系统布局

    Figure  1.  Layout of the undulator system for generation of circularly polarized radiation

    图  2  S3FEL的电子束纵向切片能量和流强分布以及切片发射度和能散分布

    Figure  2.  Slice energy and current and slice emittance and energy spread of the electron beam at S3FEL

    图  3  波荡器线内电子束方向传输角度与位置的演化

    Figure  3.  Current weighted traveling angle and position of the electron beam in the y direction

    图  4  在PMU段中线偏振辐射的峰值功率和脉冲能量以及最大群聚因子以及平均群聚因子的演化

    Figure  4.  Evolution of the peak power and pulse enegy of the linearly polarized radiation and the maximum and average bunching factor in the planar undulators

    图  5  线偏振脉冲y方向传播角度与置的演化

    Figure  5.  Power weighted traveling direction and position of the linearly polarized radiation pulse in the y direction

    图  6  在EPU段中圆偏振辐射的峰值功率和脉冲能量以及最大群聚因子以及平均群聚因子的演化

    Figure  6.  Evolution of the peak power and pulse enegy of the linearly polarized radiation and the maximum and average bunching factor in the elliptical polarized undulators

    图  7  通过60 m的自由漂移段后线偏振辐射与圆偏振辐射的横向分布;无电子束偏转情况和有电子束偏轴情况分别由上排与下排图像给出

    Figure  7.  Transverse distribution of the linearly and circularly polarized radiation for the scheme without beam deflection (top) and with beam deflection (bottom), after a 60 m-long drift section

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出版历程
  • 收稿日期:  2024-03-08
  • 修回日期:  2024-05-15
  • 录用日期:  2024-05-15
  • 网络出版日期:  2024-05-27
  • 刊出日期:  2024-05-31

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