Speaker
Fanglei Lin
(Jefferson Lab)
Description
Both polarized and unpolarized positron beams with an energy range from a few eV to hundreds of GeV have diverse applications in medicine, material science and nuclear physics. In many cases, they are the unique tools for the study of the physical world. However, the creation of polarized positrons with sufficient intensity is particularly challenging. We propose a dedicated scheme to generate polarized positrons for CEBAF and Jefferson Lab Electron-Ion Collider (JLEIC). Rather than trying to accumulate “hot” positrons after conversion, we will accumulate “cold” electrons before conversion. Charge accumulation additionally provides a novel means to convert high repetition rate (>100 MHz) electron beam from the gun to a low repetition rate (<100 MHz) positron beam for some applications. In this report, we will address the scheme in detail and explain the key areas to reach the parameter requirement.
Primary author
Fanglei Lin
(Jefferson Lab)
