Vacuum chamber eddy current correction coil for the AGS Booster

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6178170

Danby, G; Jackson, J

The AGS Booster injector will perform a variety of functions. Heavy ion acceleration requires a bakeable, ultra-high vacuum system (VC). Acceleration for intense proton beams requires rapid cycling (B /preceq/ 10T/sec). If straight forward heavy walled VC are used, the field perturbations due to eddy currents are large. The state of the art lattice has highly distributed lumped sextupoles capable of substantially correcting the induced field nonlinearity. Nevertheless, for the very highest space charge-intensity limits, it is desirable to have the capability to remove eddy current fields at the source. Correction coils attached to the outside of the VC cancel its current aberrations over the required good field aperture. These can be passively powered by transformer action, using two turn windings around the magnet yoke. Programmed power supplies can also be used. This inexpensive additional correction option uses a three turn per quadrant coil which follows the local contour of the VC. Transverse movements of several mms of the VC will have no beam optical effect since the large field aberrations and their corrections have the same displaced coordinates. Experimental and computer studies will be presented, as well as mechanical and electrical design of a simple method of construction. 6 figs.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6178170
• Report Number(s): BNL-41464; CONF-880695-71; ON: DE89011250
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430302* -- Particle Accelerators-- Injection & Extraction Systems
ACCELERATORS
BEAM INJECTION
BEAMS
BROOKHAVEN AGS
CONTAINERS
CORRECTIONS
CURRENTS
CYCLIC ACCELERATORS
DESIGN
EDDY CURRENTS
ELECTRIC CURRENTS
NUCLEON BEAMS
PARTICLE BEAMS
PARTICLE BOOSTERS
PRESSURE VESSELS
PROTON BEAMS
SYNCHROTRONS