Multipole effects on dynamic aperture in JLEIC ion collider ring

Conference · Tue Oct 01 00:00:00 EDT 2019

DOI:https://doi.org/10.18429/JACoW-NAPAC2019-TUPLO15· OSTI ID:1973836

Rajput-Ghoshal, Renuka ^[1]; Michalski, Timothy ^[1]; Wiseman, Mark ^[1]; Morozov, Vasiliy ^[1]; Lin, Fanglei ^[1]; Gamage, B.R. ^[1]; Sabbi, G.L. ^[2]; Cai, Y. ^[3]; Nosochkov, Y.M. ^[3]; Sullivan, M.K. ^[3]

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1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
3. SLAC National Accelerator Lab., Menlo Park, CA (United States)

In a collider, stronger focusing at the interaction point (IP) for low beta-star and high luminosity produces large beams at final focusing quadrupoles (FFQs). To achieve the high luminosity requirement in the Jefferson Lab Electron-Ion Collider (JLEIC), the interaction region (IR) beta functions peak at ~4.2 km in downstream FFQs. These large beta functions and FFQ multipoles reduce the dynamic aperture (DA) of the ring. A study of the multipole effects on the DA was performed to determine limits on multipoles, and to include a multipole compensation scheme to increase the DA and beam lifetime.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1973836
• Report Number(s): JLAB-ACP-19-3021; DOE/OR/23177-4770
• Country of Publication: United States
• Language: English