研究中国工程物理研究院自由电子激光相干强太赫兹源(FEL-THz)装置上鬼脉冲产生的原因及其对装置调试测量的影响，通过束流动力学模拟、热分析、蒙特卡罗模拟以及初步实验结果分析，证明了鬼脉冲将会明显破坏阻拦型测量，并会在束线管道上造成温度升高和辐射强度增大。研究表明：鬼脉冲成为限制FEL-THz装置正常工作的重要原因，为保证FEL-THz顺利出光，鬼脉冲必须予以消除，并简要讨论了鬼脉冲的消除方法。

Ghost pulses in free electron laser THz (FEL-THz) facility in CAEP are studied. The generation reasons and the impact of ghost pulses on the facility are analyzed. With electron dynamic simulation, thermal simulation, Monte Carlo simulation and prototype experiment discussion, the impact of ghost pulses is proved to include three aspects: the damage to interceptive measurement equipment, the thermal effects on the beam-line caused by beam wall loss, and higher radiation protection requirements. The results indicate that the ghost pulse is an important reason to limit the FEL-THz operation and should be eliminated. The method of eliminating ghost pulses is also discussed briefly.