Beam transport magnets for CEBAF

Technical Report · Sun Jan 01 00:00:00 EST 1989

DOI:https://doi.org/10.2172/6080743· OSTI ID:6080743

Harwood, L. H.; Biallas, G.; Boyce, J. R.; Heilbrunn, W.; Johnson, K.; York, R. C.

With respect to the optical system, the challenging parameters of the Continuous Electron Beam Accelerator Facility (CEBAF), a five pass recirculating electron linac, are the design goals for the emittance and energy spread of its beam. The design goals are an emittance of 2 /times/ 10/sup /minus/9/ m-rad at E < 1 GeV and an energy spread of ..delta..E/E (4sigma) of 10/sup /minus/4/. The nominal operating energy range of the machine is to be from 0.5 to 4 GeV. The optics to make this possible have been developed and are presented by other participants at this conference. The magnetic elements specified by the optics design are not, in general, extraordinary. There are, however, many magnets: 1047 corrector dipoles (/ell/ = 0.15 m, 0.3 m; B/sub 0/ less than or equal to 0.8 kG), 390 major dipoles (/ell/ = 1, 2, and 3 m; 2 less than or equal to B/sub 0/ less than or equal to 6 kG); 707 quadrupoles (0.15, 0.30, 0.6 m; B/sub 0/ less than or equal to 4 kG), 96 sextupoles (/ell/ = 0.3 m, B/sub 0/ less than or equal to 0.2 kG), 26 septa (/ell/ = 1, 2 m; 0.3 less than or equal to B/sub 0/ less than or equal to 6 kG), and one lambertson septum (/ell/ = 1 m; B/sub 0/ approx. = 4 kG), for a total of 2267 individual magnets. Furthermore, the fact that the quadrupoles, sextupoles, and correctors are to be individually powered to provide flexibility in tuning the optics lattice leads to restrictions on their design parameters. To ensure that the required magnetic parameters are achieved, all magnets will be magnetically mapped before installation. Therefore, systems to accurately and rapidly measure the multipoles and major dipoles are required. In this paper, present planning and the results of tests performed on the system to date are outlined. 5 refs., 4 figs.

• Research Organization: Southeastern Universities Research Association, Newport News, VA (USA). Continuous Electron Beam Accelerator Facility
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 6080743
• Report Number(s): DOE/ER/40150-64; CEBAF-PR-89-006; ON: DE89010340; TRN: 89-011541
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM BENDING MAGNETS
DESIGN
CEBAF ACCELERATOR
BEAM TRANSPORT
BEAM EMITTANCE
BEAM OPTICS
DIPOLES
OPTICAL SYSTEMS
QUADRUPOLES
TESTING
ACCELERATORS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
LINEAR ACCELERATORS
MAGNETS
MULTIPOLES
430303* - Particle Accelerators- Experimental Facilities &amp; Equipment