Studies of performance and field reproducibility of a precision 40kG superconducting dipole magnet

PDF Version Also Available for Download.

Description

An 8 deg bending magnet system for 30 GeV primary protons from the Brookhaven AGS is to be installed in the summer of 1973. This bend requires operating two magnet modules, each 6-ft. long, at an excitation up to 37kG. The cold bore I. D. is 3,375-in. A 20-in. long full-scale cross section model has been extensively tested. Multipole field components due to the magnet circuit, produce field error approx equal = 1 x 10/sup -4/ parts below 20kG out to the measurement radius at 82% of the radius to the superconductor. The good field'' (~ 1 x 10/sup -4/ ... continued below

Physical Description

Pages: 10

Creation Information

Allinger, J.; Danby, G.; DeVito, B.; Hsieh, S.; Jackson, J. & Prodell, A. January 1, 1973.

Context

This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

Who

People and organizations associated with either the creation of this article or its content.

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this article. Follow the links below to find similar items on the Digital Library.

Description

An 8 deg bending magnet system for 30 GeV primary protons from the Brookhaven AGS is to be installed in the summer of 1973. This bend requires operating two magnet modules, each 6-ft. long, at an excitation up to 37kG. The cold bore I. D. is 3,375-in. A 20-in. long full-scale cross section model has been extensively tested. Multipole field components due to the magnet circuit, produce field error approx equal = 1 x 10/sup -4/ parts below 20kG out to the measurement radius at 82% of the radius to the superconductor. The good field'' (~ 1 x 10/sup -4/ parts) shrinks to a radius ~50% of the radius to the superconductor by 40kG. Diamagnetic effects in the superconductor are completely negligible by 5kO, with the exception of the (r/sup 4/, 50) multipole. This contributes 6.5 x 10/sup -6/ parts to the field at 82% of radius. End effects are sufficiently small that for 6-ft. long magnets little or no modifications of end contours are required for even very exacting applications. The magnet has operated to 45kG with no evidence of significant straining. The magnet has been thermally cycled several times, and the field aberrations allowed by magnet design symmetries reproduce exactly from the first to last measurement runs. At 19.1kG, all allowed multipoles, i.e., 50, 70, 90, 110, with 30 tuned to zero agree to 1 x 10/sup -4/ parts error over the duration of experimental measurements. However, ferromagnetic effects due to martensitic transformations in the stainless steel inner form on which the coils are wound have grown with repeated thermal and magnetic cycling. These effect particularly the remanence and the lower harmonic components at the lower dipole field levels. (auth)

Physical Description

Pages: 10

Notes

Dep. NTIS

Source

  • 5. particle accelerator conference, San Francisco, California, USA, 5 Mar 1973

Language

Item Type

Identifier

Unique identifying numbers for this article in the Digital Library or other systems.

  • Report No.: BNL--17825
  • Report No.: CONF-730310--62
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 4326048
  • Archival Resource Key: ark:/67531/metadc1022147

Collections

This article is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this article?

When

Dates and time periods associated with this article.

Creation Date

  • January 1, 1973

Added to The UNT Digital Library

  • Oct. 15, 2017, 10:09 p.m.

Description Last Updated

  • Oct. 26, 2017, 12:59 p.m.

Usage Statistics

When was this article last used?

Congratulations! It looks like you are the first person to view this item online.

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Allinger, J.; Danby, G.; DeVito, B.; Hsieh, S.; Jackson, J. & Prodell, A. Studies of performance and field reproducibility of a precision 40kG superconducting dipole magnet, article, January 1, 1973; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc1022147/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.