LQM01 Test Summary Guram Chlachidze LARP CM16 Montauk, NY May 16-18, 2011

LQM01 coil parameters & instrumentation LQ coil # 14 in a mirror structure with a welded skin 0.7 mm Nb 3 Sn RRP 114/127 (same filament size as in RRP 108/127 strand) E-Glass insulation Protection heaters only on the outer coil surface Voltage tabs on both the inner and outer coils to locate quench origin Strain gauges mounted on the coil pole, skin and bullets Titanium pole instrumented with temperature compensated full bridges measuring the strain in the azimuthal and axial directions

LQM01 Cold Test 2 test cycles Warm-up and cool-down (TC-2) took a week No limits on temperature gradient during the cool down 03/11 03/13 03/15 03/17

Magnetic Field in LQM01 Peak field is located in the end region of the pole-turn segments Vadim Kashikhin

SSL with self field correction 1.9K4.5K B[T] I [KA] Mirror S.S.L 1.9K4.5K B[T] I [KA] Magnet S.S.L D. Turrioni 12/08/ T at 4.6 K 13.3 T at 1.9 K

LQM01 VT segments

LQM01 Quench History 4.6 K 1.9 K K 100% of SSL K 99 % of SSL TC K 1.9 K TC-1

LQM01 Training quenches TC K 1.9 K TC-2

Quench Training in LQM01 and TQM03/ K 1.9 K LQM01 RRP 114/127 E-glass TQM03RRP 108/127 E-glass TQM04RRP 108/127 S2-glass, SS cored cable

LQM01 Ramp Rate Dependence (TC1)

Ramp rate dependence: LQM01 vs. TQM03/04

Temperature Dependence in LQM01 and TQM03/04

Protection Heater Delay in LQM01 and LQS01

PCB Quench Antenna in LQM01 12 circuit-boards (4-cm long each) are distributed evenly with 20 cm spacing

LQM01 Quench Locations Quenches in the central region of the pole-turn segments Quenches in the end regions of the pole-turn segments

LQM01 Quench Locations First quenching segments in LQM01

Quench propagation speed Time-of-flight based quench propagation speed was estimated for quenches in the end region (A9_10) of the inner layer pole-turn segments

LQM01 RRR measurements

LQM01 Voltage Spikes at 4.6 K Number of Spikes vs Magnet Current Maximum voltage spike vs. Magnet current

Voltage Spikes in LQM01 and LQS01 at 4.5K RRP 54/61 (LQS01) vs. 114/127 (LQM01)

LQM01 Strain Gauge Data Coil was instrumented with 2 SG stations at the lead and return ends. SG were mounted on the coil pole, next to pole and close to the mid-plane region Skin gauges were mounted at 30, 60 and 90 degrees both on the upper and lower halves of the skin LE view Lower half Upper half LE RE

Coil strain gauges Pole Az FB Pole LG FB Pole Az QB Coil Az at pole Coil Az at PP

SG Data: Quench Training

No Field Compensation

SG Data: Quench Training

SG Summary: Coil and Pole (Azimuthal) gauges TC-1 TC-2

LQM01 Training quenches TC K 1.9 K TC-2

BACKUP SLIDES

Quenches in the central region of the pole-turn segments A7_8 A6_7 A8_9 Almost simultaneous quench development in adjacent segments Quench propagates in the first multi-turn segment in pole region (A4_5)

Quenches in the end region of the pole-turn segments A9_10 A8_9 Quenches at plateau are located in the end region (A9_10 and B4_6) of the pole-turn segments in both coil layers. Quench propagates in the first multi-turn segment in pole region (A4_5) A10_11

SG Summary: Azimuthal Skin Gauges LE view Lower half Upper half