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Title: Hybrid permanent quadrupoles for the 8 GeV transfer line at Fermilab

Abstract

Hybrid Permanent Magnet Quadrupoles for specialized portions of the 8 GeV transfer line from the Fermilab Booster to the new Main Injector have been built, tested and installed. These magnets use a 0.635 m long iron shell and provide an integrated gradient of 1.48 T-m/m with an iron pole tip radius of 0.0416 m. and pole length of 0.508 m. Bricks of 0.0254 m thick strontium ferrite supply the flux to the back of the pole to produce the desired 2.91 T/m gradient. For temperature compensation, Ni-Fe alloy strips are interspersed between ferrite bricks to subtract flux in a temperature dependent fashion. Adjustments of the permeance of each pole using iron from between the pole and the flux return shell permits the matching of pole potentials. Magnetic potentials of the poles are measured with a Rogowski coil and adjusted to the desired value to achieve the prescribed strength and field uniformity. After these adjustments, the magnets are measured using a rotating coil to determine the integral gradient and the harmonics. These measurements are used to calibrate the production Rogowski coil measurements. Similar quadrupoles are included in the design of the Fermilab Recycler.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States)
OSTI Identifier:
524937
Report Number(s):
FNAL/C-97/174; CONF-970503-316
ON: DE97053503
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Conference: 17. IEEE particle accelerator conference, Vancouver (Canada), 12-16 May 1997; Other Information: PBD: Jun 1997
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; QUADRUPOLES; DESIGN; FABRICATION; TESTING; PERMANENT MAGNETS; BEAM TRANSPORT; FERMILAB; ROGOWSKI COIL

Citation Formats

Pruss, S. M., Foster, G. W., Glass, H. D., Harding, D. J., Jackson, G. P., May, M. P., Ostiguy, J. F., and Volk, J. T. Hybrid permanent quadrupoles for the 8 GeV transfer line at Fermilab. United States: N. p., 1997. Web.
Pruss, S. M., Foster, G. W., Glass, H. D., Harding, D. J., Jackson, G. P., May, M. P., Ostiguy, J. F., & Volk, J. T. Hybrid permanent quadrupoles for the 8 GeV transfer line at Fermilab. United States.
Pruss, S. M., Foster, G. W., Glass, H. D., Harding, D. J., Jackson, G. P., May, M. P., Ostiguy, J. F., and Volk, J. T. Sun . "Hybrid permanent quadrupoles for the 8 GeV transfer line at Fermilab". United States. https://www.osti.gov/servlets/purl/524937.
@article{osti_524937,
title = {Hybrid permanent quadrupoles for the 8 GeV transfer line at Fermilab},
author = {Pruss, S. M. and Foster, G. W. and Glass, H. D. and Harding, D. J. and Jackson, G. P. and May, M. P. and Ostiguy, J. F. and Volk, J. T.},
abstractNote = {Hybrid Permanent Magnet Quadrupoles for specialized portions of the 8 GeV transfer line from the Fermilab Booster to the new Main Injector have been built, tested and installed. These magnets use a 0.635 m long iron shell and provide an integrated gradient of 1.48 T-m/m with an iron pole tip radius of 0.0416 m. and pole length of 0.508 m. Bricks of 0.0254 m thick strontium ferrite supply the flux to the back of the pole to produce the desired 2.91 T/m gradient. For temperature compensation, Ni-Fe alloy strips are interspersed between ferrite bricks to subtract flux in a temperature dependent fashion. Adjustments of the permeance of each pole using iron from between the pole and the flux return shell permits the matching of pole potentials. Magnetic potentials of the poles are measured with a Rogowski coil and adjusted to the desired value to achieve the prescribed strength and field uniformity. After these adjustments, the magnets are measured using a rotating coil to determine the integral gradient and the harmonics. These measurements are used to calibrate the production Rogowski coil measurements. Similar quadrupoles are included in the design of the Fermilab Recycler.},
doi = {},
url = {https://www.osti.gov/biblio/524937}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {6}
}

Conference:
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