CBETA at Cornell, the first 4-turn SRF Energy Recovery Linac with a single FFA return loop

by Georg Hoffstaetter

Thursday 14 Feb 2019, 14:15 → 15:30 Europe/Zurich

30/7-018 - Kjell Johnsen Auditorium (CERN)

The Electron Ion Collider has been determined to be the USA’s highest priority new large accelerator for Nuclear Physics by the National Academy of Sciences. Its luminosity relies on electron cooling, and only Energy Recovery Linacs (ERLs) can provide the cooling parameters. A collaboration between Cornell University and Brookhaven National Laboratory has designed and is constructing CBETA, the Cornell-BNL ERL Test Accelerator on the Cornell campus. All acceleration sections have been tested with beam, and beam is about to start going through the Energy Recovery Loop. The ERL technology that has been prototyped at Cornell for many years is being used for this new accelerator, including a DC electron source and an SRF injector Linac with world-record current and normalized brightness in a bunch train, and a high-current linac cryomodule optimized for ERLs. For the return loop, a Fixed-Field Alternating-gradient (FFA) optics is used with a factor of 4 momentum aperture, so that all accelerating and decelerating beams can be stored in the same beam pipe. The strong magnets for the FFA optics are permanent magnets of the Haibach type. The high-brightness beam with 150 MeV and up to 40 mA will have applications beyond EIC cooling and basic accelerator research, in industry, in nuclear physics, and in X-ray science.

ATS Seminars Organisers: H. Burkhardt (BE), M. Modena (ATS), T. Stora (EN)

Coffee / tea will be served after the seminar in room 30/7-012 next to the Auditorium

19_02_14HoffstaetterCERN.pdf

19_02_14HoffstaetterCERN.pptx