Speaker
Description
The Electron-Ion Collider (EIC), which is currently being designed for construction at Brookhaven National Laboratory, will collide polarized electron beams (5-18 GeV) with polarized hadron beams (41-275 GeV for protons) at luminosities up to $10^{34} \textrm{cm}^{-2} \textrm{s}^{-1}$ in a 3.8-kilometer ring. The EIC will be the only lepton-hadron collider since HERA at DESY and, in contrast to that earlier machine, will feature high polarization of both electrons and protons, a wide range of center-of-mass collision energies, a wide range of ion species, and much higher luminosities. These properties will make it an ideal machine for exploring the mass and spin dynamics of nucleons. The Electron Storage Ring (ESR) will be built in the existing 3.8-kilometer RHIC tunnel using normal-conducting magnets and a few superconducting magnets for the final-focus quadrupoles and spin-rotator solenoids. The wide range of energies, high polarization, high current, large beam-beam parameters, and stringent geometric constraints make the ESR a particularly challenging machine. Lately, the design of the ESR has advanced considerably with design alternatives and upgrade paths being considered to align with the key deliverables and funding profile of the project. This contribution highlights some of the important recent developments and design studies.
Funding Agency
Work supported by Brookhaven Science Associates, LLC, under Contract
No. DE-SC0012704, by Jefferson Science Associates, LLC, under
Contract No. DE-AC05-06OR23177 with the U.S. Department of Energy.
| Paper status | Resubmitted proceeding files received and assigned to an editor. Accepted by Submitter. |
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