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Publication Information
Title Exploration of Spin Tune Modes in the EIC Electron Storage Ring
Abstract The design of the Electron-Ion Collider (EIC) aims to attain a high longitudinal electron polarization (at least 70%) at the collision points as required by the nuclear physics program. The design-orbit spin tune in the Electron Storage Ring (ESR) is approximately proportional to the beam energy. Therefore, the electron beam energy for collisions has to be chosen to avoid first-order spin-orbit depolarizing resonances. Depolarization due to such resonances excited by the synchrotron radiation, as well as synchrotron sidebands of these resonances, has been confirmed in spin tracking simulations for the ESR. In this paper, we discuss a technique that can make the design-orbit spin tune independent of the beam energy and avoid resonances with the betatron and synchrotron tunes, and thus improve the electron polarization. We explore the capability of implementing energy-independent integer and half integer spin tune modes in the ESR.
Author(s) Fanglei Lin, Vasiliy Morozov , Amy Sy , Vadim Ptitsyn, H. Witte, S. Tepikian, Desmond Barber, Ulrich Wienands, Oleksii Beznosov, J. Ellison, Klaus Heinemann
Publication Date May 2021
Category Beam Dynamics
Document Type Meeting
Primary Institution Thomas Jefferson National Accelerator Facility, Newport News
Affiliation Accelerator Ops, R&D / Cntr-Adv Studies of Acce / Ctr for Adv Stud of Accel
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: OSTI Number:
LANL Number: Other Number:
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Meeting / Conference
Meeting Name IPAC21
Meeting Date 5/24/2021
Document Subtype Abstract
Attachments/Datasets/DOI Link
Document(s)
EIC_ESR_ST_Modes.docx (STI Document)
Dataset(s) (none)
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