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Summary Injectors and Injection

This workshop focuses on the transfer lines from injector to LESR, on-axis and off-axis injection, injector requirements for storage ring upgrade projects, and booster modifications and commissioning. The goal is to achieve top-up with transparent injection efficiency of 100%.

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Summary Injectors and Injection

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  1. Summary Injectors and Injection Volker Schlott (PSI), Peter Kuske (HZB) Beam Tests and Commissioning of Low Emittance Storage Rings, Workshop, 18-20 February, Karlsruhe, Germany

  2. Session on Injectors and Injection 4 contributions: Transfer line from injector to LESR (P. Kuske) On axis injection (M. Aiba) Injector requirements for LE storage ring upgrade projects (Z. Duan) Booster modifications and commissioning (N. Carmignani / S. White) Goal: top-up with transparent injection with 100% efficiency. The chosen injection scheme determines the design of booster (or modifications) and the transfer line. Upgrade projects: modifications can be done before „dark periods“ BTR TLs often require renewal of components

  3. BESSY II 4 kicker, off-axis inj. swap-out inj. 3 kicker/anti-septum NLK NLK NLK* ??? ???

  4. Injector Requirements small natural emittance – large circumference of synchrotron/in the same tunnel increase horizontal tune operate off-momentum and change damping partition operate on coupling resonance – why not emittance exchange? energy spread usually okay bunch length either too long or too short challenge for swap-out – high charge operation Dedicated accumulator ring (ALS-U) or use of the booster for acceleration+accumulation.

  5. Requirements for Transfer Line On-axis injection schemes – transverse Twiss-parameters matched to injection straight values Off-axis injection schemes – 4/3 kicker bump: βinj < βsto NLK: ßinj > ßsto Actual ß- and -values depend on the details of the injection Linac would be the best choice as injector for off-axis injection and longitudinal on-axis injection – small transverse and longitudinal emittance (MAXIV, Spring8-II). Injector and injection is very critical for the success of the next generation LS based on diffraction limited SR – don‘t try to save money by sacrificing diagnostics.

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