Magnetic Field Measurements for Fast-Changing Magnetic Fields

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

doi:10.2172/1661620

Title: Magnetic Field Measurements for Fast-Changing Magnetic Fields

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Abstract

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.

Authors:

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

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

Publication Date:: Mon Jun 13 00:00:00 EDT 2005

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1661620

Report Number(s):: ASC-PW-2004; BNL-219092-2020-TECH

Grant/Contract Number:: SC0012704

Resource Type:: Accepted Manuscript

Country of Publication:: United States

Language:: English

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

Citation Formats


                    Jain, Animesh, Escallier, John, Ganetis, George, Louie, Wing, Marone, Andrew, Thomas, Richard, and Wanderer, Peter. Magnetic Field Measurements for Fast-Changing Magnetic Fields.  United States: N. p., 2005. 
Web.  doi:10.2172/1661620.

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                    Jain, Animesh, Escallier, John, Ganetis, George, Louie, Wing, Marone, Andrew, Thomas, Richard, & Wanderer, Peter. Magnetic Field Measurements for Fast-Changing Magnetic Fields.  United States.  https://doi.org/10.2172/1661620

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                    Jain, Animesh, Escallier, John, Ganetis, George, Louie, Wing, Marone, Andrew, Thomas, Richard, and Wanderer, Peter. Mon .  
"Magnetic Field Measurements for Fast-Changing Magnetic Fields".  United States.  https://doi.org/10.2172/1661620.  https://www.osti.gov/servlets/purl/1661620.

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@article{osti_1661620,

  title        = {Magnetic Field Measurements for Fast-Changing Magnetic Fields},

  author       = {Jain, Animesh and Escallier, John and Ganetis, George and Louie, Wing and Marone, Andrew and Thomas, Richard and Wanderer, Peter},

  abstractNote = {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.},

  doi          = {10.2172/1661620},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Mon Jun 13 00:00:00 EDT 2005},

  month        = {Mon Jun 13 00:00:00 EDT 2005}

}

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