SQ02

1
SQ02

• Paolo Ferracin
• October 19 , 2005

2
Goals of SQ02

• Effect of axial loading on training
• Perform tests with different axial loadings
• Monitor coil stress with strain gauges
• Compare and interpret results with FEM
• Quench studies
• SQ magnet optimization
• Coils parts
• Assembly procedure
• Test of TQ conductor
• Loading (shell-rod stress) similar to SQ01
• Conductor stress similar to SQ01

3
Magnet design

• 4 new subscale coils
• Conductor
• TQ strand
• 20 strand cable
• Heat treatment
• 210 C / 48 h
• 400 C / 48 h
• 640 C / 48 h
• Peak field in the ends

4
Short sample

• 4 virgin strands and 1 extracted strand
• Magnet short sample
• Extracted strand meas. and load line
• Two cases
• With self field correction
• Iss 9.9 kA
• Bpeak 11.1 T
• Without self field correction
• Iss 9.8 kA
• Bpeak 10.9 T

5
Coil fabrication

• Bronze island
• Instrumentation
• 10 voltage taps,1spot heater, 4 strain gauges

6
Coil fabrication

• Symmetric axial loading
• Horseshoe cut in the return end RE
• RE end shoes inserted during assembly

7
Magnet assembly

• New assembly procedure
• All the axial load provided before the azimuthal
• High load condition gt 35 t of axial load

8
Conductor and magnet performance

• Assuming Iss 9.9 kA
• First thermal cycle
• 1st quench 60 Iss
• 90 in 13 quenches
• Imax 95 Iss
• Second thermal cycle
• 1st quench 95 Iss
• Imax 97 Iss
• Assuming Iss 9.8 kA
• Additional 1
• In all the following graphs
• Iss 9.9 kA