Calculations on Cylindrical Metal Vacuum Chambers in Pulsed Magnetic Fields

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It has been suggested that metallic vacuum chambers might be suitable for pulsed magnets operating at audio frequencies, with pulse widths nominally 1/360 sec. In the present note calculations are given for a simple model of such a system, in order to estimate the effects of field attenuation and eddy current losses. The results of the calculation may be summarized briefly as follows, where the results apply to a cylindrical chamber of non-maeyletic stainless steel, 3.0 cm in inside diameter and 0.15 an wall thickness: (1) With steady-state harmonic excitation, the field in the interior Is reduced by a factor ... continued below

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9 pages

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Creator: Unknown. October 8, 1964.

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Description

It has been suggested that metallic vacuum chambers might be suitable for pulsed magnets operating at audio frequencies, with pulse widths nominally 1/360 sec. In the present note calculations are given for a simple model of such a system, in order to estimate the effects of field attenuation and eddy current losses. The results of the calculation may be summarized briefly as follows, where the results apply to a cylindrical chamber of non-maeyletic stainless steel, 3.0 cm in inside diameter and 0.15 an wall thickness: (1) With steady-state harmonic excitation, the field in the interior Is reduced by a factor of {approximately} 1.03 at 2,000 cps compared to dc; (2) With transient operation, the exponential decay time is about 0.021 millisecond; (3) With square-wave excitation, at 200 gauss and 180 pps, the power dissipation in the stainless steel is about 24 watts/foot, or about a factor of 20 less if half-sine-wave pulses are used instead of square pulses. These results seem encouraging enough to warrant experimental investigation of this type of vacuum chamber for pulsed steering.

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9 pages

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  • Other Information: PBD: 8 Oct 1964

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  • Report No.: SLAC-TN-63-46
  • Grant Number: AC03-76SF00515
  • DOI: 10.2172/763863 | External Link
  • Office of Scientific & Technical Information Report Number: 763863
  • Archival Resource Key: ark:/67531/metadc723019

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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.

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  • October 8, 1964

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 2, 2016, 5:22 p.m.

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Calculations on Cylindrical Metal Vacuum Chambers in Pulsed Magnetic Fields, report, October 8, 1964; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc723019/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.