tqm05 (coil #36) test summary 1. tq coil #36 in a mirror structure coil #36 tested with a radiation...
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TQM05 (coil #36)Test Summary
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TQ coil #36 in a mirror structure
Coil #36 tested with a radiation resistant impregnation material 0.7-mm diameter Nb3Sn strand of RRP 54/61 sub-element design
a drop off conductor from LQ coil #10, reel 989R Double butt lap 75 µm E-glass insulation Coil was impregnated with Matrimid 5292 (polyimide)
Impregnation details are compared to the standard CTD-101K epoxy in the table below
Detail Matrimid® CTD-101K
Impregnation Temperature 125 °C 60 °CImpregnation Time 15 min 240 minCuring Temperature 200 °C 125 °CCuring Time 10 hours 16 hoursViscosity at impregnation Temp 10 cP 100 cPPot Life at impregnation Temp 90 min 1200 min
R. Bossert, S. Krave ASC-2012
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TQ coil #36 after reaction …
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… and impregnation
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TQ coil #36 in a mirror structure
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TQM05 shim system
R. Bossert
Azimuthal pre-load of 145-150 MPa was provided in the inner coil layer for magnets TQM04 and TQM05
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TQ coil #36 in a mirror structure• Coil cross section with flux density distribution at 14 kA
TQ mirror structure TQ quadrupole
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TQM05 voltage taps
• A10 voltage tap is open
VT36A2
VT36B2VT36A10
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TQM05 SSL estimate No witness sample data available for TQ coil #36
A drop off cable from LQ coil #10 Witness sample data for LQ coil #10 used to estimate SSL of TQM05 SSL of TQM02 (coil #17 made of the RRP 54/61 strand) was used as a
second reference point
11.5 11.75 12 12.25 12.5 12.75 13 13.25 13.5 13.75 14 14.25 14.512.5
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13.5
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14.5
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15.5
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16.5 1.9 K3.0 K4.6 KBp_center, TBp_end, T
B[T]
Curr
ent[
A]
4.6 K 3.0 K 1.9 KSSL, kA 13.32 14.502 15.082Bp_end, T 12.581 13.517 13.976
D. Turrioni
M. Bossert
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TQM05 Quench History• All training quenches initiated in the pole-turn segments• 98% of SSL reached at 3 different temperatures• Final 4.5 K quench plateau established at 96% of SSL
Quench plateau verification after MIITs study
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TQM05 Ramp Rate Dependence
• All quenches developed in the pole-turn segments
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TQM01-03 Ramp Rate Dependence
7000
9000
11000
13000
15000
0 100 200 300 400
Qu
en
ch
cu
rre
nt
(A)
Current ramp rate (A/s)
TQM01-4.5K
TQM02-4.5K
TQM02-1.9K
TQM03a-4.5K
TQM03a-1.9K
TQM03b-4.5K
TQM03b-1.9K
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TQM05 Temperature Dependence
• All quenches initiated in the pole-turn segments
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TQM02-03 Temperature Dependence
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All TQM trainings at 4.5 K
• TQM01, TQM02, TQM05 made of RRP 54/61• TQM05, TQM03, TQM04 reached almost 100% of SSL
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TQM05 RRR measurementsAverage measured RRR in TQM05 is ~250
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TQM05 voltage spike dataHalf-coil signals are captured at 100 kHz sampling rate
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TQM05 SG data
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TQM05 SG data (cont’d)
LE Pole RE Pole
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TQM05 protection heater study Minimum PH power required to quench the magnet was estimated
at 4.5 K and 1.9 K 3-mil Kapton film and 2 layers of 5-mil glass placed between the PH and coil
Only one heater fired with a decay time of 24 ms ~45 W/cm2 is required at the LHC injection current
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TQM05 protection heater study (cont’d)
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Summary 1-m long TQ coil #36 in a mirror structure (TQM05) with a radiation resistant
impregnation material successfully was tested at Fermilab Matrimid 5292 (polyimide) used for impregnation Coil made of 0.7-mm diameter Nb3Sn strand of RRP 54/61 sub-element design
98% of SSL was reached at 4.5 K, 3 K and 1.9 K 2% of degradation was observed at 4.5 K after the quench training at 1.9 K
Quench training, ramp rate and temperature dependence studies did not show any negative impact of the MATRIMID impregnation on the coil performance
Average RRR (~250), as well as voltage spike data found consistent with other RRP 54/61 magnets
Second thermal cycle will be done to check quench memory of the magnet
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