Speaker
Description
A continuous wave (CW) positron source, as proposed Ce+baf at Jlab, produces positron beams of variable yield and polarization. Depending on users’ preferences, the Ce+baf positrons from the target needs to be selected and captured before being delivered to CEBAF linac at an energy of 123 MeV. An SRF cavity-solenoid capture scheme is proposed to accelerate and capture the CW positron beam using adiabatic damping and profile control to maximize transmission into the CEBAF acceptance. Beam particle and power loss throughout the capture section are analyzed. The initial beamline design of SRF cavities and solenoids in a cryomodule is performed to examine the influence of solenoid’s magnetic field on the SRF cavity operation. The application of SRF cavities with larger iris radius to the capture section is also studied in efforts to improve the capture efficiency.
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