BNL, Upton, Long Island, New York, USA
Stony Brook University, Stony Brook, USA
An ampere class 20 MeV superconducting Energy Recovery Linac (ERL) is presently under commissioning at Brookhaven National Laboratory (BNL) for testing of concepts relevant for high-energy coherent electron cooling and electron-ion colliders. The injector subsystems tests and installation were finished in fall 2013. The injector includes: SRF photoelectron gun with 1 MW amplifier, 10W green drive-laser system, multi-alkaline cathode deposition system, cathode transport system, beam instrumentation and control. * The first photo current from ERL SRF gun has been observed in fall 2014 after second attempt. Completion of the ERL returning loop components installation is scheduled for April 2015 following full power ERL commissioning. After ERL commissioning in BLDG912 the ERL will be relocated to RHIC IP2 to be used as low energy RHIC electron cooler.
* D.Kayran et al., First test results from SRF photoinjector for the R&D ERL at BNL, IPAC'14, pp. 748-750
BNL, Upton, Long Island, New York, USA
Stony Brook University, Stony Brook, USA
The proposed eRHIC [1] accelerator accelerates the electron bunches to a maximum energy of 21.2 GeV. This is accomplished by the use of an 1.3 GeV Energy Recovery Linac (ERL) and two FFAG arcs which recirculate the electron bunches 16 times through the (ERL) to achieve the top energy of 21.2 GeV to collide with the hadron beam. After the interaction the e-bunches decelerate down to injection energy of 12 MeV and are sent to the beam dump. In this talk we will discuss the 3D electromagnetic field calculations and the beam optics of the low energy FFAG cell using realistic field maps obtained from the 3d OPERA [2] calculations.
[1] http://arxiv.org/ftp/arxiv/papers/1409/1409.1633.pdf
[2] Vector Fields Inc.