Horizontal Splitter Design For FFA@CEBAF Energy Upgrade: Current Status

Conference · Sat Jun 01 04:00:00 EDT 2024

DOI:https://doi.org/10.18429/JACoW-IPAC2024-THPC39· OSTI ID:2372859

Benesch, Jay ^[1]; Roblin, Yves ^[1]; Bodenstein, R. ^[1]; Deitrick, K. ^[1]; Freeman, B. ^[1]; Gamage, B. ^[1]; Kazimi, R. ^[1]; Khan, D. ^[1]; Price, K. ^[1]; Satogata, T. ^[1]; Schaumloffel, B. ^[1]; Coxe, A. ^[1]; Berg, J. ^[2]

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1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
2. Brookhaven National Laboratory (BNL), Upton, NY (United States)

Thomas Jefferson National Accelerator Facility (Jefferson Lab) is currently studying the feasibility of an energy upgrade based upon Fixed-Field Alternating Gradient (FFA) permanent magnet technology. The current plan is to replace the highest-energy recirculation arcs with FFA arcs, increasing the total number of beam recirculations, thus the energy. In order to accommodate multiple passes in the FFA arcs, horizontal splitters are being designed to control the beam parameters entering the FFA arcs, as well as the time of flight and R_56. In the current design, six passes will recirculate through the FFA arcs, necessitating the design of six independent beamlines to control the optics and beam dynamics matching into the arcs. These beamlines must fit into the current CEBAF tunnel, while allowing for personnel and equipment access. They must also be flexible enough to accommodate the beam under realistic operational conditions and fluctuations. The constraints on the system are highly restrictive, complicating the design. This document will describe the current state of the design, and indicate the work remaining for a complete conceptual design.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 2372859
• Report Number(s): JLAB-ACP-23-3998; DOE/OR/23177-7481
• Country of Publication: United States
• Language: English