== "//Anomalous Beam Transport Through Gabor (Plasma) Lens Prototype//" ==

DOI:  ;[https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Notes/CCAP-TN-ACCL-06.pdf Preprint], [https://arxiv.org/abs/2104.05637 arXiv:2104.05637] \\

   '''Abstract'''::
   >''An electron plasma lens is a cost-effective, compact, strong-focusing element that can ensure efficient capture of low-energy proton and ion beams from laser-driven sources. A Gabor lens prototype was built for high electron density operation at Imperial College London. The parameters of the stable operation regime of the lens and its performance during a beam test with 1.4 MeV protons are reported here. Narrow pencil beams were imaged on a scintillator screen 67 cm downstream of the lens. The lens converted the pencil beams into rings that show position-dependent shape and intensity modulation that are dependent on the settings of the lens. Characterisation of the focusing effect suggests that the plasma column exhibited an off-axis rotation similar to the ''m=1'' diocotron instability. The association of the instability with the cause of the rings was investigated using particle tracking simulations.''\\


   '''Figures'''::

   [[Image(LensDiagram_v1_th.png)]]  '''Fig. 1''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2021/GL_Beam_Experiment/LensDiagram_v1.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2021/LensDiagram_v1.png png] \\