Measurements of beam pipe eddy current effects in Main Injector dipole magnets

Conference · Sat Aug 01 00:00:00 EDT 1992

OSTI ID:10118991

Walbridge, D G.C.; Bleadon, M E; Brown, B C; Glass, H D; Harding, D J; Mazur, P O; Sim, J W

The dipole magnets for the proposed Main Injector project at Fermilab are designed to ramp to maximum field (1.7 T) at rates over 2.5 T/s. These ramp rates will produce eddy current effects which degrade overall field quality. A harmonics probe was constructed for the purpose of measuring eddy current field components during the ramp cycle. Three separate ramp rates were employed ranging from 1.3 T/s to 2.7 T/s. Tests were performed using beam pipes with two different resistivities. The dominant multipole contribution resulting from eddy current effects in each beam pipe was sextupole. The sextupole component closely matched the calculated prediction.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 10118991
• Report Number(s): FNAL/C-92/220; CONF-920706-56; ON: DE94005997; TRN: 94:003538
• Resource Relation: Conference: International conference on high energy accelerators,Hamburg (Germany),20-24 Jul 1992; Other Information: PBD: Aug 1992
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
MAGNETS
ION BEAM INJECTION
PIPES
HARMONICS
EDDY CURRENTS
430302
INJECTION AND EXTRACTION SYSTEMS