Polarized positrons in Jefferson lab electron ion collider (JLEIC)

Fanglei Lin, Joe Grames, Jiquan Guo, Vasiliy Morozov, Yuhong Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

The Jefferson Lab Electron Ion Collider (JLEIC) is designed to provide collisions of electron and ion beams with high luminosity and high polarization to reach new frontier in exploration of nuclear structure. The luminosity, exceeding 1033 cm-2s-1 in a broad range of the center-of-mass (CM) energy and maximum luminosity above 1034 cm-2s-1, is achieved by high-rate collisions of short small-emittance low-charge bunches with proper cooling of the ion beam and synchrotron radiation damping of the electron beam. The polarization of light ion species (p, d, 3He) and electron can be easily preserved, manipulated and maintained by taking advantage of the unique figure-8 shape rings. With a growing physics interest, polarized positron-ion collisions are considered to be carried out in the JLEIC to offer an additional probe to study the substructure of nucleons and nuclei. However, the creation of polarized positrons with sufficient intensity is particularly challenging. We propose a dedicated scheme to generate polarized positrons. 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 broad applications. In this paper, we will address the scheme, provide preliminary estimated parameters and explain the key areas to reach the desired goal.

Original languageEnglish
Title of host publicationInternational Workshop on Physics with Positron at Jefferson Lab
EditorsEric Voutier, Joseph Grames
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735416772
DOIs
StatePublished - May 25 2018
Externally publishedYes
EventInternational Workshop on Positron Physics at Jefferson Lab, JPos 2017 - Newport News, United States
Duration: Sep 12 2017Sep 15 2017

Publication series

NameAIP Conference Proceedings
Volume1970
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceInternational Workshop on Positron Physics at Jefferson Lab, JPos 2017
Country/TerritoryUnited States
CityNewport News
Period09/12/1709/15/17

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