论文标题
线性活性等离子体透镜中的多kt/m聚焦梯度
Multi-kT/m Focusing Gradient in a Linear Active Plasma Lens
论文作者
论文摘要
活跃的等离子体镜头是紧凑的设备作为带电颗粒梁的有前途的束束替代替代品，能够用于高能梁的短焦距。我们以前已经表明，在呈氩气的等离子体透镜中可以实现具有约0.3 kt/m梯度的线性磁场，以保留束发射束[C.A. Lindstrøm等人，物理。莱特牧师。 121，194801（2018）]。在这里，我们表明，使用直径为500μm的氩气，这些磁场仍然是线性的，聚焦梯度为3.6 kt/m，这比四极磁体的梯度高。紧凑的马克思银行提供了产生磁场的当前脉冲，并且高度可重复。这些结果建立了活跃的等离子体透镜，作为脉冲颗粒束应用的理想装置，需要在整个晶状体孔径中均匀的焦点梯度。
Active plasma lenses are compact devices developed as a promising beam-focusing alternative for charged particle beams, capable of short focal lengths for high-energy beams. We have previously shown that linear magnetic fields with gradients of around 0.3 kT/m can be achieved in argon-filled plasma lenses that preserve beam emittance [C.A. Lindstrøm et al., Phys. Rev. Lett. 121, 194801 (2018)]. Here we show that with argon in a 500 μm diameter capillary, the fields are still linear with a focusing gradient of 3.6 kT/m, which is an order of magnitude higher than the gradients of quadrupole magnets. The current pulses that generate the magnetic field are provided by compact Marx banks, and are highly repeatable. These results establish active plasma lenses as an ideal device for pulsed particle beam applications requiring very high focusing gradients that are uniform throughout the lens aperture.
