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在基于加速器的北京慢正电子强束流装置上,用Penning-Trap技术实现了脉冲慢正电子束流的存储和直流化．实验表明,系统的真空度对正电子的存储效率有严重影响,脉冲正电子的释放方式决定了直流化后束流的能量分散;改变释放级信号波形以及释放方式可以得到能量分散小于1eV的准直流化慢正电子束流．
In the accelerator-based Beijing slow positron beamformer, the Penning-Trap technique is used to store and direct the pulsed slow positron beam. Experiments show that the degree of vacuum of the system has a serious impact on the storage efficiency of positrons, and the positron emission mode determines the energy dispersion of the post-direct current beam. The energy dispersion can be less than 1eV by changing the release level signal waveform and the release mode DC slow slow beam.