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Article

Anomalous Beam Transport through Gabor (Plasma) Lens Prototype

1
Department of Physics, Imperial College London, Exhibition Road, London SW7 2AZ, UK
2
Department of Physics, SUPA, University of Strathclyde, 16 Richmond Street, Glasgow G4 0NG, UK
3
STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, UK
4
John Adams Institute for Accelerator Science, Imperial College London, London SW7 2AZ, UK
*
Authors to whom correspondence should be addressed.
Academic Editor: Paolo Branchini
Appl. Sci. 2021, 11(10), 4357; https://doi.org/10.3390/app11104357
Received: 13 April 2021 / Revised: 3 May 2021 / Accepted: 4 May 2021 / Published: 11 May 2021
(This article belongs to the Section Applied Physics)
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. View Full-Text
Keywords: plasma trap; space-charge lens; beam transport; instability; proton therapy plasma trap; space-charge lens; beam transport; instability; proton therapy
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MDPI and ACS Style

Nonnenmacher, T.; Dascalu, T.-S.; Bingham, R.; Cheung, C.L.; Lau, H.-T.; Long, K.; Pozimski, J.; Whyte, C. Anomalous Beam Transport through Gabor (Plasma) Lens Prototype. Appl. Sci. 2021, 11, 4357. https://doi.org/10.3390/app11104357

AMA Style

Nonnenmacher T, Dascalu T-S, Bingham R, Cheung CL, Lau H-T, Long K, Pozimski J, Whyte C. Anomalous Beam Transport through Gabor (Plasma) Lens Prototype. Applied Sciences. 2021; 11(10):4357. https://doi.org/10.3390/app11104357

Chicago/Turabian Style

Nonnenmacher, Toby, Titus-Stefan Dascalu, Robert Bingham, Chung Lim Cheung, Hin-Tung Lau, Ken Long, Jürgen Pozimski, and Colin Whyte. 2021. "Anomalous Beam Transport through Gabor (Plasma) Lens Prototype" Applied Sciences 11, no. 10: 4357. https://doi.org/10.3390/app11104357

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