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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

15

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