== "//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(LhARA-v4-3u-thumb.png)]]  '''Fig. 1''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/LhARA-v4-3.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/LhARA-v4-3u.png png] \\ 

   [[Image(Capture-thumb.png)]]  '''Fig. 2''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/Capture.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/Capture.png png] \\

   [[Image(stage1overview-u-thumb.png)]]  '''Fig. 3''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/stage1overview.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/stage1overview.png png] \\

   [[Image(optics-thumb.png)]]  '''Fig. 4''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/optics.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/optics.png png] \\

   [[Image(EndStationPhaseSpace-thumb.png)]]  '''Fig. 5''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/EndStationPhaseSpace.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/EndStationPhaseSpace.png png] \\

   [[Image(injmatch0f-thumb.png)]]  '''Fig. 6''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/injmatch0f.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/injmatch0f.png png] \\

   [[Image(LhARA_Ring_Stage2-thumb.png)]]  '''Fig. 7''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/LhARA_Ring_Stage2.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/LhARA_Ring_Stage2.png png] \\

   [[Image(FFAFigs-thumb.png)]]  '''Fig. 8''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/FFAFigs.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/FFAFigs.png png] \\

   [[Image(invitro_madxvsbdsim_40mev_beta_fix-thumb.png)]]  '''Fig. 9a''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/invitro_madxvsbdsim_40mev_beta_fix.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/invitro_madxvsbdsim_40mev_beta_fix.png png] 
   [[Image(invitro_madxvsbdsim_127p4mev_beta_fix-thumb.png)]]  '''Fig. 9b''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/invitro_madxvsbdsim_127p4mev_beta_fix.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/invitro_madxvsbdsim_127p4mev_beta_fix.png png] \\

   [[Image(BDSImvsMADX_invivo-thumb.png)]]  '''Fig. 10''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/BDSImvsMADX_invivo.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/BDSImvsMADX_invivo.png png] \\

   [[Image(s1EndStation_mono_annot-thumb.png)]]  '''Fig. 11''' [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/pre-CDR/s1EndStation_mono_annot.pdf pdf] [https://ccap.hep.ph.ic.ac.uk/trac/attachment/wiki/Communication/Publications/2020/s1EndStation_mono_annot.png png] \\