= Publications 2021 = ---- * **[wiki:Communication/Publications/2021/GL_Beam_Experiment Anomalous Beam Transport Through Gabor (Plasma) Lens Prototype]**; T. Nonnenmacher ''et al.'' \\ [https://doi.org/10.3390/app11104357 DOI: doi.org/10.3390/app11104357]; [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:''':: ||[raw-attachment:LensDiagram_v1.png Fig. 1]||[raw-attachment:Detector_v3.png Fig. 2]||[raw-attachment:Schematic_exp.png Fig. 3]||[raw-attachment:Amplitude.png Fig. 4]||[raw-attachment:Guildford_v2.png Fig. 5]||[raw-attachment:Aperture.png Fig. 6]||[raw-attachment:ScintillatorPhotoCombined.png Fig. 7]||[raw-attachment:comparisonplotSurrey.png Fig. 8]||[raw-attachment:3Spotand6SpotFlipped_v2.png Fig. 9]||[raw-attachment:6spotlensonflipped_v2.png Fig. 10]||[raw-attachment:GreyscaleSurface_Plot_of_Tuesday36cut.png Fig. 11]||[raw-attachment:Dipole_instability_v2.png Fig. 12]||[raw-attachment:Rings_hist_v3.png Fig. 13]||[raw-attachment:GaborPlot.png Fig. 14]||[raw-attachment:CentroidXVSCentroidY15kVNewScale.png Fig. 15]||[raw-attachment:GaborPointsCombined2withlines_.png Fig. 16]||[raw-attachment:XYratioVScentroidX15kVNewScale.png Fig. 17] '''[wiki:Communication/Publications/2021/GL_Beam_Experiment Details]''':: ---- {{{#!comment [[TitleIndex(Communication/Publications/2019/, hideprefix,format=group)]] }}}