Magnetic Field Measurements for Fast-Changing Magnetic Fields

Journal Article · Mon Jun 13 00:00:00 EDT 2005

DOI:https://doi.org/10.2172/1661620· OSTI ID:1661620

Jain, Animesh ^[1]; Escallier, John ^[1]; Ganetis, George ^[1]; Louie, Wing ^[1]; Marone, Andrew ^[1]; Thomas, Richard ^[1]; Wanderer, Peter ^[1]

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1. Brookhaven National Lab. (BNL), Upton, NY (United States)

Several recent applications for fast ramped magnets have been found that require rapid measurement of the field quality during the ramp. (In one instance, accelerator dipoles will be ramped at 1 T/sec, with measurements needed to the accuracy typically required for accelerators.) We have built and tested a new type of magnetic field measuring system to meet this need. The system consists of 16 stationary pickup windings mounted on a cylinder. The signals induced in the windings in a changing magnetic field are sampled and analyzed to obtain the field harmonics. To minimize costs, printed circuit boards were used for the pickup windings and a combination of amplifiers and ADC’s used for the voltage readout system. New software was developed for the analysis. Magnetic field measurements of a model dipole developed for the SIS200 accelerator at GSI are presented. The measurements are needed to insure that eddy currents induced by the fast ramps do not impact the field quality needed for successful accelerator operation.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: SC0012704
• OSTI ID: 1661620
• Report Number(s): ASC-PW-2004; BNL-219092-2020-TECH
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
Fast ramped magnets
Facility for Antiproton and Ion Research
magnetic field measurement
superconducting accelerator magnets