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1.8 m or 1 m Coils for Model Magnets?

1.8 m or 1 m Coils for Model Magnets?. M. Karppinen 7 March 2013. Magnet Assembly. With pre-assembled collar packs and half-yokes/yoke sections the complexity and the time to carry out the collar and yoke assembly are practically the same . Coil fabrication time is th e same for 1 m and 2 m.

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1.8 m or 1 m Coils for Model Magnets?

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  1. 1.8 m or 1 m Coils for Model Magnets? M. Karppinen 7March 2013

  2. Magnet Assembly • With pre-assembled collar packs and half-yokes/yoke sections the complexity and the time to carry out the collar and yoke assembly are practically the same. • Coil fabrication time is the same for 1 m and 2 m 1930.97 1443 M. Karppinen CERN TE-MSC

  3. Integrated Field Quality (1.8 m coils) • Magnetic iron cut-back: • >0.5 m magnetic straight section • More X-talk between apertures Courtesy of B. Auchmann M. Karppinen CERN TE-MSC

  4. Magnet with 1 m coils • Cable UL 135 m • Easier potting (tooling qualification?) • Faster cool-down • Lower L • Fine for assessing quench performance • Gives qualitative idea of PC, ISCC, etc. • No magnetic straight section (accelerator quality?) • Very short coil straight section (layer-jump) • Tooling modifications • Curing and welding press for 2 m coils • Need new shells • Quench protection studies? • n hours of DO work M. Karppinen CERN TE-MSC

  5. Magnet with 1.8 m coils • Uniform 2D field in the straight section • Tooling commissioned • Magnet parts in stock / in fabrication • No extra DO effort required • Better suited for protection studies • Better precision for PC, dynamic effects, etc. • Cable UL 220 m • Longer cooldown • Higher L M. Karppinen CERN TE-MSC

  6. Conclusion • Shortening the model magnet coil length from 1.8 m to 1 m would require 85 m shorter cable unit length • Assembly process would be practically the same • At CERN curing and welding press would need to be reconfigured • Coil fabrication tooling would need to be modified or new part made • Mandrel, base plates, .. • Requires DO effort • Schedule and cost impact • We are fully geared up for 1.8 m coil production. • Training test would be somewhat faster with shorter recovery time after each quench • There would not be any magnetic straight section. • Very limited time to demonstrate the accelerator quality before the scale-up M. Karppinen CERN TE-MSC

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