Tech Note Information

Name

Electron-Ion Collider (EC)

BNL Number

BNL-229823-2026-TECH

BNL Series Number

229823

Description/Abstract

This note presents a contemporaneous lattice design for the EIC HSR ring using the 250730a\\\\r\\\\nrelease for 275GeV protons as a reference. The lattice is modified to replace the hadron cooling\\\\r\\\\nsection in IR2 with a RHIC-like layout similar to the other non-colliding HSR insertions, and to\\\\r\\\\nfollow the hadron beam direction i.e. counterclockwise. Another upgrade is the inclusion of the\\\\r\\\\nhigh-order field harmonics of the bending dipoles as derived from RHIC’s magbase database. For the\\\\r\\\\npurposes of this document, only the sextupole harmonics (b2) are discussed. The impact of these\\\\r\\\\nharmonics on the baseline betatron tunes Qx,y and chromaticities χx,y is discussed, as well as the calculation and correction of the first two non-linear chromaticity terms χ(2,3) x,y .

Publication Date

5/28/2026

Submittal Date

6/4/2026

Author Information

Primary Author

G. Robert-Demolaize

Other Authors

Berg, J Scott

DOE Subject Category

NUCLEAR PHYSICS AND RADIATION PHYSICS