{"id":108,"date":"2024-04-18T06:34:12","date_gmt":"2024-04-18T06:34:12","guid":{"rendered":"https:\/\/rubiclin.com\/?page_id=108"},"modified":"2026-05-13T08:55:44","modified_gmt":"2026-05-13T08:55:44","slug":"tunable-permanent-magnet-based-accelerator-magnets","status":"publish","type":"page","link":"https:\/\/rubiclin.com\/index.php\/products\/tunable-permanent-magnet-based-accelerator-magnets\/","title":{"rendered":"Tunable permanent magnet based accelerator magnets"},"content":{"rendered":"\n

Principle<\/strong><\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
    \n
  • Two concentric Halbach rings (dipole, quadrupole, etc)<\/li>\n\n\n\n
  • Individually rotatable<\/li>\n\n\n\n
  • Synchronized rotation of two n-pole fields can set both magnitude<\/strong> and direction<\/strong><\/li>\n\n\n\n
  • Minimal stray field outside the rings<\/li>\n\n\n\n
  • Inherent magnetic field quality measurement (by rotating the rings)<\/li>\n<\/ul>\n\n\n\n

    Features<\/strong><\/h2>\n\n\n\n
    \n
      \n
    • Can be mounted\/unmounted around existing vacuum pipe
      \u2192 compatible with bake-out<\/li>\n\n\n\n
    • Repositioning with high accuracy<\/li>\n\n\n\n
    • Field quality measurement at any time<\/li>\n\n\n\n
    • Play-free driving mechanism<\/li>\n\n\n\n
    • Convertible between dipole\/quadrupole\/etc by replacing one component<\/li>\n\n\n\n
    • Zero energy consumption in steady state<\/li>\n\n\n\n
    • Tunability: ~ 0.01T<\/li>\n\n\n\n
    • Mitigation of temperature-dependent remanent flux density: by tuning<\/li>\n\n\n\n
    • Br<\/sub> degradation due to radiation:
      – By tuning, if homogeneous
      – By reshuffling the magnets if non-homogeneous + tuning<\/li>\n\n\n\n
    • Can be stacked with no gap (current design: 30 mm extra length w.r.t. magnets) <\/li>\n\n\n\n
    • Different lengths easily achievable<\/li>\n<\/ul>\n<\/div>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \"\"<\/figure>\n\n\n\n

      Magnetic field<\/strong><\/h2>\n\n\n\n

      Practical limits:<\/p>\n\n\n\n

        \n
      • Dipole: up to 1.5 T<\/li>\n\n\n\n
      • Quadrupole: up to 125 T\/m<\/li>\n<\/ul>\n\n\n\n

        References<\/strong><\/h2>\n\n\n\n

        Tunable, unmountable, permanent-magnet-based accelerator
        magnet, Phys. Rev. Accel. Beams 28, 072401<\/p>\n\n\n\n

        A prototype was procured and tested by CERN (European Laboratory for Particle Physics) for evaluation.<\/p>\n\n\n\n

        \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

        Principle Features Magnetic field Practical limits: References Tunable, unmountable, permanent-magnet-based acceleratormagnet, Phys. Rev. Accel. Beams 28, 072401 A prototype was procured and tested by CERN (European Laboratory for Particle Physics) for evaluation.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":19,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-108","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/rubiclin.com\/index.php\/wp-json\/wp\/v2\/pages\/108","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rubiclin.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/rubiclin.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/rubiclin.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rubiclin.com\/index.php\/wp-json\/wp\/v2\/comments?post=108"}],"version-history":[{"count":20,"href":"https:\/\/rubiclin.com\/index.php\/wp-json\/wp\/v2\/pages\/108\/revisions"}],"predecessor-version":[{"id":181,"href":"https:\/\/rubiclin.com\/index.php\/wp-json\/wp\/v2\/pages\/108\/revisions\/181"}],"up":[{"embeddable":true,"href":"https:\/\/rubiclin.com\/index.php\/wp-json\/wp\/v2\/pages\/19"}],"wp:attachment":[{"href":"https:\/\/rubiclin.com\/index.php\/wp-json\/wp\/v2\/media?parent=108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}