The Cornell-BNL ERL Test Accelerator – status and opportunities
by Steve Peggs (BNL)
The Cornell-BNL ERL Test Accelerator (CBETA) takes a step towards the future Electron-Ion Collider (EIC) that BNL hopes to build as the next major nuclear physics project in the U.S. The power bill is a major challenge for future high current electron accelerators, such as EIC. CBETA, which prototypes state-of-the-art Energy Recovery Linac (ERL) technology, is under construction at Cornell University. Electrons pass 4 times through a superconducting RF cryomodule during acceleration from 6 MeV to 150 MeV, followed by 4 deceleration passes. Most of the 70 m circumference consists of a return loop with a single beam pipe, using Halbach-style permanent magnet quadrupoles configured with very strong FFAG optics to enable a very large momentum acceptance. Final “phase 1” beam commissioning is scheduled for late 2019 and early 2020. A later “phase 2” CBETA development could be used to perform user-based experiments at Cornell.
There are opportunities for accelerator physics collaboration, in phase 1 beam commissioning, in the design of CBETA phase 2 (and similar ERLs), and in EIC.
CBETA is funded by the New York State Energy Research & Development Agency.
Collaboration page: https://www.classe.cornell.edu/CBETA_PM