PD Front End Focusing Solenoid

1
PD Front End Focusing Solenoid

• Development Status

2
Requirements-I

• (Febr. 14, 2005)
• Total Length (including leads, He Vessel etc.) -
  18 cm
• Effective length - 10 cm
• Bore - 3 cm
• Field at center of Magnet
• - 3-5 Tesla for RT part
• - 5-6 Tesla for SSR part
• - 9-10 Tesla for DSR part

Implied FI RT (90 250) T2cm SSS
-- (250 360) T2cm DSS -- (810 1000)
T2cm
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Requirements-II
Corrected requirements RT FI 156
T2cm (G.R. ?) SSS -- FI 630 T2cm
(G.R.) DSS -- FI 960 T2cm (G.R.)
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RT Section Solenoid
Inom 310 A FInom 155 T2cm Imax 400 A
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Stress and Displacement Diagrams
Assembly _at_ 300 K
No currrent _at_ 4 K
400 A _at_ 4 K
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Single Spoke Section Solenoid
150 mm in length
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Field Integral
FI 440 T2cm at quench
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Fringe Field
Typical Field Level 0.5 Gs _at_ 100 mm from
the wall
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SSS Solenoid. Dressing

1. Almost there on paper.
2. Need more space to fit into
3. Option of 2 K operation
4. Option of making Nb3Sn insert

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DSS Solenoid

1. Use smashed Nb-Ti wire with dense winding
2. Maximal Field 7.5 T
3. Field Integral at 7.5 T 1100 T2cm
4. Still no practical solution

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Conclusion

• 1. RT section solenoid ready to start working
  with
• 2. SSS and DSS do not meet criteria of
  sufficient margin
• 3. Specifications must be critically evaluated
• 4. Composite material properties must be studied