Speaker
Jiquan Guo
(Jefferson Lab)
Description
JLEIC polarized positron program calls for a luminosity no more than one order of magnitude lower than the electron program. In this talk, a PEPPo based positron beam formation scheme will be presented. The combination of PEPPo’s low positron yield, the low duty factor injection bunch train required by JLEIC e-/e+ ring, as well as the mismatch of the JLEIC and CEBAF RF frequency, pose major challenges for this injection scheme, requiring enormous electron charge per bunch at the e-/e+ conversion. We propose a solution with a small 748.5MHz ring accumulating the “cold” electron, and extracting the long bunch train in 17MHz bunch reprate with a stripline harmonic RF kicker. Preliminary study shows that this scheme can achieve the ~0.2A beam current for the ~10^33/cm^2/s luminosity goal.
Primary author
Jiquan Guo
(Jefferson Lab)
Co-authors
Fanglei Lin
(Jefferson Lab)
Joe Grames
(Jefferson Lab)
Vasiliy Morozov
(Jefferson Lab)
Yuhong Zhang
(Jefferson Lab)
