APS upgrade: Commissioning the world’s first light source based on swap-out injection

Sajaev, Vadim [Argonne, PHY]; Brill, Adam [Argonne, PHY]; Yang, Bingxin [Argonne, PHY]; Rafael, Fernando [Argonne, PHY]; Shen, Guobao [Argonne, PHY]; Bui, Hahn [Argonne, PHY]; Shang, Hairong [Argonne, PHY]; Dooling, Jeffrey [Argonne, PHY]; Carwardine, John [Argonne, PHY]; Calvey, Joseph [Argonne, PHY]; Harkay, Katherine [Argonne, PHY]; Emery, Louis [Argonne, PHY]; Smith, Martin [Argonne]; Borland, Michael [Argonne, PHY]; Kelly, Michael [Argonne, PHY]; Arnold, Ned [Argonne, PHY]; Kuklev, Nikita [Fermilab]; Mohsen, Osama [Argonne, PHY] (ORCID:0000000200108092); Soliday, Robert [Argonne, PHY]; Lindberg, Ryan [Argonne, PHY]; Fors, Thomas [Argonne, PHY]; Berenc, Tim [Argonne, PHY]; Wienands, Uli [Argonne, PHY]; Cheng, Weixing [Argonne, PHY]; Sun, Yine [Argonne, PHY]

doi:10.18429/jacow-napac2025-moxp02

DOE OSTI · 3028550

APS upgrade: Commissioning the world’s first light source based on swap-out injection

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Abstract

The Advanced Photon Source (APS) has recently completed a major upgrade, replacing its 25-year-old storage ring with a cutting-edge hybrid seven-bend achromat lattice enhanced by six additional reverse bends. The new design achieves a natural emittance of 42 pm-rad, enabling the production of X-rays up to 500 times brighter than those generated by the original APS. A key innovation of the upgrade is the implementation of a swap-out injection scheme, which replaces entire depleted bunches instead of performing traditional top-up injection. This approach enables on-axis injection to accommodate for the reduced dynamic aperture resulting from strong focusing. This paper outlines the commissioning process, shares initial operating experience with swap-out injection, and presents performance data for new systems such as the bunch-lengthening cavity.

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Sajaev, Vadim [Argonne, PHY], Brill, Adam [Argonne, PHY], Yang, Bingxin [Argonne, PHY], Rafael, Fernando [Argonne, PHY], Shen, Guobao [Argonne, PHY], Bui, Hahn [Argonne, PHY], Shang, Hairong [Argonne, PHY], Dooling, Jeffrey [Argonne, PHY], Carwardine, John [Argonne, PHY], Calvey, Joseph [Argonne, PHY], Harkay, Katherine [Argonne, PHY], Emery, Louis [Argonne, PHY], Smith, Martin [Argonne], Borland, Michael [Argonne, PHY], Kelly, Michael [Argonne, PHY], Arnold, Ned [Argonne, PHY], Kuklev, Nikita [Fermilab], Mohsen, Osama [Argonne, PHY] (ORCID:0000000200108092), Soliday, Robert [Argonne, PHY], Lindberg, Ryan [Argonne, PHY], Fors, Thomas [Argonne, PHY], Berenc, Tim [Argonne, PHY], Wienands, Uli [Argonne, PHY], Cheng, Weixing [Argonne, PHY], Sun, Yine [Argonne, PHY]. 2026-01-28. APS upgrade: Commissioning the world’s first light source based on swap-out injection. https://doi.org/10.18429/jacow-napac2025-moxp02

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