We investigated plasma behavior with a solenoid-generated static and pulsed magnetic field by measuring time evolution in a transverse ion current profile to control the ion current waveform of a laser ion source. The results showed that static magnetic fields cannot enhance the ion current in the slow region of time of flight (TOF). However, a pulsed magnetic field whose magnetic flux density is rising while a plasma passes through the solenoid can enhance the ion current in the same TOF region. The results showed that applying a pulsed magnetic field to a laser-produced plasma is an effective way to control an ion current waveform in a laser ion source to produce an ion beam with a flat-top-shaped pulse. By using a pulsed magnetic field, the ion current waveform peak was held for ∼50 µs.

中文翻译：

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脉冲磁场控制激光离子源电流波形

我们通过测量横向离子电流分布中的时间演变来控制激光离子源的离子电流波形，研究了具有螺线管产生的静态和脉冲磁场的等离子体行为。结果表明，静磁场不能增强飞行时间慢区 (TOF) 中的离子电流。然而，当等离子体通过螺线管时，其磁通密度正在上升的脉冲磁场可以增强同一 TOF 区域中的离子电流。结果表明，对激光产生的等离子体施加脉冲磁场是控制激光离子源中离子电流波形以产生具有平顶形脉冲的离子束的有效方法。通过使用脉冲磁场，离子电流波形峰值保持约 50 µs。