Time dependent magnetization effects in superconducting accelerator magnets [electronic resource]
The long time drift of the sextupole harmonic b[sub 2], at injection fields is a common feature of superconducting accelerator magnets and, as yet, is not well understood. Measurements of the magnetization decay of superconducting wires and cables show that the normal magnetization decay is not the...
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Online Access |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Dept. of Defense ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1992.
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| Subjects: |
MARC
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| 245 | 0 | 0 | |a Time dependent magnetization effects in superconducting accelerator magnets |h [electronic resource] |
| 260 | |a Washington, D.C. : |b United States. Dept. of Defense ; |a Oak Ridge, Tenn. : |b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, |c 1992. | ||
| 300 | |a Pages: (3 p) : |b digital, PDF file. | ||
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| 500 | |a Published through the Information Bridge: DOE Scientific and Technical Information. | ||
| 500 | |a 01/01/1992. | ||
| 500 | |a "bnl-47602" | ||
| 500 | |a " conf-920706--43" | ||
| 500 | |a "DE93002322" | ||
| 500 | |a International conference on high energy accelerators, Hamburg (Germany), 20-24 Jul 1992. | ||
| 500 | |a Sampson, W.; Ghosh, A.K.; Robins, K.E. | ||
| 520 | 3 | |a The long time drift of the sextupole harmonic b[sub 2], at injection fields is a common feature of superconducting accelerator magnets and, as yet, is not well understood. Measurements of the magnetization decay of superconducting wires and cables show that the normal magnetization decay is not the primary source of the large b[sub 2] drift observed in magnets. Along with this phenomena has been the recent observation of an axial variation in b[sub 2] of accelerator dipoles. This periodic variation in the field along the axis has been observed in a large number of SSC, RHIC and other superconducting dipoles. In all cases the periodicity of the variation matches the lay pitch of the cables used in the magnets. The time dependence of the development and the decay of these field variations has been examined, and found to vary from magnet to magnet. Non-uniform current distribution in the strands of the cable appear to be the cause of this axial variation and may also be responsible for the observed b[sub 2] drift. Details of these measurements and sources for the non-uniform current distribution are discussed in this paper. | |
| 536 | |b AC02-76CH00016. | ||
| 650 | 7 | |a Electromagnets. |2 local. | |
| 650 | 7 | |a Superconducting Devices. |2 local. | |
| 650 | 7 | |a Magnetization. |2 local. | |
| 650 | 7 | |a Magnets. |2 local. | |
| 650 | 7 | |a Time Dependence. |2 local. | |
| 650 | 7 | |a Dipoles. |2 local. | |
| 650 | 7 | |a Equipment. |2 local. | |
| 650 | 7 | |a Superconducting Magnets. |2 local. | |
| 650 | 7 | |a Electrical Equipment. |2 local. | |
| 650 | 7 | |a Multipoles. |2 local. | |
| 650 | 7 | |a Oscillations. |2 local. | |
| 650 | 7 | |a Accelerators. |2 local. | |
| 650 | 7 | |a Harmonics. |2 local. | |
| 650 | 7 | |a Magnetic Dipoles. |2 local. | |
| 650 | 7 | |a Particle Accelerators. |2 edbsc. | |
| 710 | 2 | |a Brookhaven National Laboratory. |4 res. | |
| 710 | 1 | |a United States. |b Department of Defense. |4 spn. | |
| 710 | 1 | |a United States. |b Department of Energy. |4 spn. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Scientific and Technical Information. |4 dst. | |
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