ION BEAM POLARIZATION DYNAMICS IN THE 8 GEV BOOSTER OF THE JLEIC PROJECT AT JLAB

Conference · Sun May 01 00:00:00 EDT 2016

OSTI ID:1331988

Kondratenko, A. M. ^[1]; Kondratenko, M. A. ^[1]; Morozov, Vasiliy ^[2]; Derbenev, Yaroslav S. ^[2]; Lin, Fanglei; Zhang, Yuhong ^[2]; Filatov, Yuri ^[3]

---

1. GOO Zaryad, Russkaya st., 41, Novosibirsk, 630058, Russia
2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
3. MIPT, Dolgoprudniy, Moscow Region, Russia

In the Jefferson Lab’s Electron-Ion Collider (JLEIC) project, an injector of polarized ions into the collider ring is a superconducting 8 GeV booster. Both figure-8 and racetrack booster versions were considered. Our analysis showed that the figure-8 ring configuration allows one to preserve the polarization of any ion species during beam acceleration using only small longitudinal field with an integral less than 0.5 Tm. In the racetrack booster, to pre-serve the polarization of ions with the exception of deu-terons, it suffices to use a solenoidal Siberian snake with a maximum field integral of 30 Tm. To preserve deuteron polarization, we propose to use arc magnets for the race-track booster structure with a field ramp rate of the order of 1 T/s. We calculate deuteron and proton beam polari-zations in both the figure-8 and racetrack boosters includ-ing alignment errors of their magnetic elements using the Zgoubi code.

• 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; DE-AC02-06CH11357
• OSTI ID: 1331988
• Report Number(s): JLAB-ACP-16-2246; DOE/OR/23177-3793
• Resource Relation: Conference: IPAC'16, 08-13 May 2016. Busan, Korea
• Country of Publication: United States
• Language: English