Anomalous Beam Transport through Gabor (Plasma) Lens Prototype
| Autor: | Colin G. Whyte, Chung Lim Cheung, Titus-Stefan Dascalu, H. T. Lau, Jürgen Pozimski, Kenneth Long, Robert Bingham, Toby Nonnenmacher |
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| Přispěvatelé: | Science and Technology Facilities Council (STFC) |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Proton Chemistry Multidisciplinary beam transport Electron 01 natural sciences 010305 fluids & plasmas law.invention ION-BEAMS Engineering MANIPULATION law physics.plasm-ph proton therapy General Materials Science Biology (General) Instrumentation QC Fluid Flow and Transfer Processes Physics General Engineering Engineering (General). Civil engineering (General) Computer Science Applications Pencil (optics) Lens (optics) Chemistry space-charge lens Physical Sciences TA1-2040 plasma trap Accelerator Physics (physics.acc-ph) QH301-705.5 QC1-999 Materials Science Engineering Multidisciplinary FOS: Physical sciences Materials Science Multidisciplinary Diocotron instability Instability Physics Applied Optics 0103 physical sciences DIOCOTRON INSTABILITY 010306 general physics QD1-999 physics.acc-ph Science & Technology business.industry Process Chemistry and Technology Plasma Physics - Plasma Physics Plasma Physics (physics.plasm-ph) instability Physics - Accelerator Physics business Beam (structure) |
| Zdroj: | Applied Sciences, Vol 11, Iss 4357, p 4357 (2021) Applied Sciences Volume 11 Issue 10 |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app11104357 |
| Popis: | 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. Comment: 22 pages, 17 figures, preprint submitted to Applied Sciences |
| Databáze: | OpenAIRE |
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