Anomalous Beam Transport through Gabor (Plasma) Lens Prototype
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...
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| Format: | Article |
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MDPI AG
2021-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/10/4357 |
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| author | Toby Nonnenmacher Titus-Stefan Dascalu Robert Bingham Chung Lim Cheung Hin-Tung Lau Ken Long Jürgen Pozimski Colin Whyte |
| author_facet | Toby Nonnenmacher Titus-Stefan Dascalu Robert Bingham Chung Lim Cheung Hin-Tung Lau Ken Long Jürgen Pozimski Colin Whyte |
| author_sort | Toby Nonnenmacher |
| collection | DOAJ |
| description | 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>m</mi><mo>=</mo><mn>1</mn></mrow></semantics></math></inline-formula> diocotron instability. The association of the instability with the cause of the rings was investigated using particle tracking simulations. |
| first_indexed | 2024-03-10T11:31:43Z |
| format | Article |
| id | doaj.art-6f7270e6d8de4cc7a2f310b9c34a8768 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T11:31:43Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-6f7270e6d8de4cc7a2f310b9c34a87682023-11-21T19:11:19ZengMDPI AGApplied Sciences2076-34172021-05-011110435710.3390/app11104357Anomalous Beam Transport through Gabor (Plasma) Lens PrototypeToby Nonnenmacher0Titus-Stefan Dascalu1Robert Bingham2Chung Lim Cheung3Hin-Tung Lau4Ken Long5Jürgen Pozimski6Colin Whyte7Department of Physics, Imperial College London, Exhibition Road, London SW7 2AZ, UKDepartment of Physics, Imperial College London, Exhibition Road, London SW7 2AZ, UKDepartment of Physics, SUPA, University of Strathclyde, 16 Richmond Street, Glasgow G4 0NG, UKDepartment of Physics, Imperial College London, Exhibition Road, London SW7 2AZ, UKDepartment of Physics, Imperial College London, Exhibition Road, London SW7 2AZ, UKSTFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, UKSTFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, UKDepartment of Physics, SUPA, University of Strathclyde, 16 Richmond Street, Glasgow G4 0NG, UKAn 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>m</mi><mo>=</mo><mn>1</mn></mrow></semantics></math></inline-formula> diocotron instability. The association of the instability with the cause of the rings was investigated using particle tracking simulations.https://www.mdpi.com/2076-3417/11/10/4357plasma trapspace-charge lensbeam transportinstabilityproton therapy |
| spellingShingle | Toby Nonnenmacher Titus-Stefan Dascalu Robert Bingham Chung Lim Cheung Hin-Tung Lau Ken Long Jürgen Pozimski Colin Whyte Anomalous Beam Transport through Gabor (Plasma) Lens Prototype Applied Sciences plasma trap space-charge lens beam transport instability proton therapy |
| title | Anomalous Beam Transport through Gabor (Plasma) Lens Prototype |
| title_full | Anomalous Beam Transport through Gabor (Plasma) Lens Prototype |
| title_fullStr | Anomalous Beam Transport through Gabor (Plasma) Lens Prototype |
| title_full_unstemmed | Anomalous Beam Transport through Gabor (Plasma) Lens Prototype |
| title_short | Anomalous Beam Transport through Gabor (Plasma) Lens Prototype |
| title_sort | anomalous beam transport through gabor plasma lens prototype |
| topic | plasma trap space-charge lens beam transport instability proton therapy |
| url | https://www.mdpi.com/2076-3417/11/10/4357 |
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