Conceptual Design of the Interaction Region Magnets for Future Electron-Ion Collider at Jefferson Lab

Journal Article · Thu Aug 01 00:00:00 EDT 2019 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/TASC.2019.2896378· OSTI ID:1506226

Wiseman, Mark ; Hutton, Chuck; Lin, Fanglei; Morozov, Vasiliy; Rajput-Ghoshal, Renuka

The Jefferson Lab Electron Ion Collider (JLEIC) is a proposed new machine for nuclear physics research. As proposed, it will deliver between 15 and 65 GeV center of mass energy collisions between electrons and nuclei. It uses the existing CEBAF accelerator as a full energy injector to deliver 3 to 10 GeV electrons into a new electron collider ring. An all new ion accelerator and collider complex will deliver up to 100 GeV protons, or 40 GeV/nucleon ions. The machine will have luminosity goals of above 1033 cm-2 sec-1 in the whole energy range with a maximum of a few 1034 cm-2 sec-1. The two collider rings use a unique figure-of eight layout to deliver a high degree of polarization in both beams. The machine will include room for two interaction regions with only one initially installed. The crossing angle in the primary interaction region will be 50 mrad. The whole detector region including forward detection covers about 80 meters of the JLEIC complex. This paper will describe the requirements and preliminary designs for both the ion and electron beam magnets in the most complex 32 m long interaction region (IR) around the interaction point (IP). The interaction region has over thirty-seven superconducting magnets operating at 4.5K; these include dipoles, quadrupoles, skew-quadrupoles, solenoids, horizontal and vertical correctors and higher order multipole magnets. The paper will also discuss the electromagnetic interaction between these magnets.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1506226
• Report Number(s): JLAB-PHY-18-2854; DOE/OR/23177-4571
• Journal Information: IEEE Transactions on Applied Superconductivity, Vol. 29, Issue 5; ISSN 1051-8223
• Country of Publication: United States
• Language: English