JLAB, Newport News, Virginia, USA
An electron cooling facility which is capable to deliver a beam with energy up to 55 MeV and average current up to 1.5 A at a high bunch repetition rate up to 750 MHz is required for MEIC. The present cooler design concept is based on a magnetized photo-cathode SRF gun, an SRF ERL and a compact circulator ring. In this paper, we present a proposal of a test facility utilizing the JLab FEL ERL for a technology demonstration of this cooler design concept. Beam studies will be performed and supporting technologies will also be developed in this test facility
THO1B01
JLAB, Newport News, Virginia, USA
The high luminosity goal of MEIC, the envisioned medium energy ring-ring electron-ion collider at Jefferson Lab, is achieved through the implementation of a design concept based on high bunch repetition rate colliding beams with a crab crossing. Recently at Jefferson Lab, an ion injector and storage ring complex has been designed for delivering a required ion beam of superior qualities characterized by ultra short bunch length and ultra small emittance. Such ion beams are possible due to advantages of the high bunch repetition rate, ultra small bunch charges, and multi-staged beam cooling. This paper will present highlights of the design of this ion complex and the scheme of ion beam formation. We then present the staged beam cooling scheme followed by a discussion on its critical role in the ion beam formation process. We further will present the design concept of a medium energy electron cooler for the ion collider ring utilizing two advanced accelerator technologies, namely, ERL and circulator ring. Lastly we will present a recent proposal of a test facility based on the JLab FEL driver ERL for a technology demonstration of this medium energy ERL circulator cooler concept.
# yzhang@jlabl.org
