Keyword: permanent-magnet
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MOPORI15 Update of Adjustable PMQ Lens quadrupole, focusing, site, dipole 262
 
  • Y. Iwashita
    Kyoto University, Research Reactor Institute, Osaka, Japan
  • Y. Fuwa
    JAEA/J-PARC, Tokai-mura, Japan
  • T. Hosokai
    ISIR, Osaka, Japan
  • D. Oumbarek Espinos
    Osaka University, Graduate School of Engineering, Osaka, Japan
 
  Gluckstern’s adjustable permanent magnet quadrupole (PMQ) lens based on five rings is revisited to achieve a compact focusing system for laser-accelerated beams. The first prototype was fabricated for bore diameter of 50 mm. The integrated gradient was up to 6.8 T. A new PMQ with a bore diameter of 25 mm is under fabrication based on the same geometry. While the first prototype unit was developed for the final focus magnet of the ILC, the sec-ond unit is the first doublet element for laser-accelerated electron beam focusing to be combined with this first unit. The current status of the development is reported.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPORI15  
About • Received ※ 01 September 2022 — Revised ※ 03 September 2022 — Accepted ※ 05 September 2022 — Issue date ※ 15 September 2022
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TUPORI30 Application of Permanent Magnets in Solenoid and Quadrupole Focusing solenoid, quadrupole, focusing, vacuum 622
 
  • J.D. Kaiser, A. Ateş, H. Hähnel, U. Ratzinger
    IAP, Frankfurt am Main, Germany
 
  Permanent magnets can be used to design compact high gradient focusing elements for particle accelerators. Based on cheap industrial standard Neodym permanent magnets, design studies for Solenoids and Quadrupoles are presented. The Solenoid design consists of three segments, where the outer segments possess a radial magnetization and the inner segments an axial magnetization. This increases the mean field strength in comparison to a singlet hollow cylinder solenoid. The quadrupole design consists of 16 block magnets and is designed to be rather simplistic. The casing consists of two half shells, which can be easily mounted around a beam pipe. For a quadrupole triplet configuration the influence of different geometric parameters on beam transport regarding focusing strength and emittance growth is investigated. Furthermore, a variation of the quadrupole design was mounted in vacuum in a triplet configuration. Using custom 3D-printed mounts for small raspberry pi cameras the beam could be observed inside the quadrupoles. A first prototype was constructed  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI30  
About • Received ※ 13 August 2022 — Revised ※ 17 August 2022 — Accepted ※ 02 September 2022 — Issue date ※ 04 September 2022
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