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Superconducting Sextupole Corrector Magnet for the LHC Main Dipoles
Each LHC main dipole will be equipped with small sextupole corrector ma g nets with a field strength of 1970 x2 T/m2 and a magnetic length of 100 mm designed to correct the sextupole field errors. The paper presents a cosine-q type of design where much emphasis has been put on the cost reduction bec...
Autores principales: | , , |
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Lenguaje: | eng |
Publicado: |
1996
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Materias: | |
Acceso en línea: | http://cds.cern.ch/record/307557 |
_version_ | 1780889875169411072 |
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author | Salminen, J Ijspeert, Albert Puntambekar, A |
author_facet | Salminen, J Ijspeert, Albert Puntambekar, A |
author_sort | Salminen, J |
collection | CERN |
description | Each LHC main dipole will be equipped with small sextupole corrector ma g nets with a field strength of 1970 x2 T/m2 and a magnetic length of 100 mm designed to correct the sextupole field errors. The paper presents a cosine-q type of design where much emphasis has been put on the cost reduction because these magnets have to be made in large series of some 2500 pieces. We describe the design of a two-layer coil which can be wound automatically. The winding starts in the middle of the wire with the only joggle, the layer jump, which is housed in a corresponding groove in the end of the central island. The two layers are wound simultaneously turning in opposite directions to find their position without the need of local tooling. The coil ends are closely packed and need no end spacers. The 18 pole perturbation introduced by the ends is corrected by the position of the coil block in the straight part. The yoke is made of iron laminations of the "Scissors type" which transmit the pre-stress from the outer aluminium shrink ring to the coil. This allows the iron to be close to the coil for field enhancement and also boosts the pre-stress in the coil due to the cool down contractions. The paper describes the experience with the magnet construction and gives the first test results. |
id | cern-307557 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 1996 |
record_format | invenio |
spelling | cern-3075572023-05-31T13:21:11Zhttp://cds.cern.ch/record/307557engSalminen, JIjspeert, AlbertPuntambekar, ASuperconducting Sextupole Corrector Magnet for the LHC Main DipolesAccelerators and Storage RingsEach LHC main dipole will be equipped with small sextupole corrector ma g nets with a field strength of 1970 x2 T/m2 and a magnetic length of 100 mm designed to correct the sextupole field errors. The paper presents a cosine-q type of design where much emphasis has been put on the cost reduction because these magnets have to be made in large series of some 2500 pieces. We describe the design of a two-layer coil which can be wound automatically. The winding starts in the middle of the wire with the only joggle, the layer jump, which is housed in a corresponding groove in the end of the central island. The two layers are wound simultaneously turning in opposite directions to find their position without the need of local tooling. The coil ends are closely packed and need no end spacers. The 18 pole perturbation introduced by the ends is corrected by the position of the coil block in the straight part. The yoke is made of iron laminations of the "Scissors type" which transmit the pre-stress from the outer aluminium shrink ring to the coil. This allows the iron to be close to the coil for field enhancement and also boosts the pre-stress in the coil due to the cool down contractions. The paper describes the experience with the magnet construction and gives the first test results.LHC-Project-Report-27CERN-LHC-Project-Report-27oai:cds.cern.ch:3075571996-06-07 |
spellingShingle | Accelerators and Storage Rings Salminen, J Ijspeert, Albert Puntambekar, A Superconducting Sextupole Corrector Magnet for the LHC Main Dipoles |
title | Superconducting Sextupole Corrector Magnet for the LHC Main Dipoles |
title_full | Superconducting Sextupole Corrector Magnet for the LHC Main Dipoles |
title_fullStr | Superconducting Sextupole Corrector Magnet for the LHC Main Dipoles |
title_full_unstemmed | Superconducting Sextupole Corrector Magnet for the LHC Main Dipoles |
title_short | Superconducting Sextupole Corrector Magnet for the LHC Main Dipoles |
title_sort | superconducting sextupole corrector magnet for the lhc main dipoles |
topic | Accelerators and Storage Rings |
url | http://cds.cern.ch/record/307557 |
work_keys_str_mv | AT salminenj superconductingsextupolecorrectormagnetforthelhcmaindipoles AT ijspeertalbert superconductingsextupolecorrectormagnetforthelhcmaindipoles AT puntambekara superconductingsextupolecorrectormagnetforthelhcmaindipoles |