Quench heaters study updates from AUP M Baldini
Quench heaters study updates from AUP M. Baldini, S. Krane, V. Marinozzi, M. Parker
Short model MQXFS 1 e: He gas Hi-pot tests • CLIQ leads used for heater and coil connections • • The CLIQ lead from the magnet connected to CL 2 OL heaters (8 strips) in coils 3 & 103 connected to CL 3 OL heaters (8 strips) in coils 5 & 104 connected to CL 1 Hi-pot tests at selected temperatures up to selected voltages (800, 1500 V) Heater to coil voltage CL 1 Heater to coil Voltage CL 3 1. 9 K 2300 V 75 K 800 V (test 1) 1500 V 150 K 800 V (test 1) 1500 V (failed at flattop) 300 K 800 V (test 1) 1200 V 1360 V 800 V (test 1) 970 V 2
Short model MQXFS 1 e: 300 K in air (after He gas tests) QH 3 (CL 3) 103 (CL 3) 5 (CL 1) 104 (CL 1) OL 1 460 V OH 2 short 460 V OH 3 460 V OL 4 460 V § The shorted heater was in the group that failed 150 K and 300 K hipot in He § Meet requirements at ambient T in air (after a thermocycle) § 4 QH/coil: survivability of ~100% at 800 V and ~94% at 1, 500 V at 150 K. 3
MQXFAP 2 after He First breakdown voltages testing up to 1500 V 6 out of 8 heater circuits passed the test Heater circuit 3 failed at 1. 4 k. V (arc-fail, 116. 5 μA leakage current) Heater circuit 4 failed at 1. 5 k. V (arc-fail, 92. 3 μA leakage current) 4
LQS 03 model § Each heater covers half length, and full width of the surface where it is applied § Each coil has four heaters: § 2 OL heaters (one on return end, one on lead end) § 2 IL heaters (one on return end, one on lead end) § Polyimide thickness: 25 µm § § § 41 training quenches 4 trips Thermocycles: 5
LQS 03 hi-pot results after cold test 0 - 500 V 500 - 2000 V 2000 - 3680 V Breakdown voltages testing up to 6000 V (OL), 2000 V (IL) > 3680 V COIL 18 COIL 16 COIL 19 COIL 15 Lead end, OL 2. 11 k. V (BD) 2. 47 k. V (BD) 1. 92 k. V (A) 2. 47 k. V (BD) Return end, OL 1. 61 k. V (A) 1. 71 k. V (A) 1. 55 k. V (A) 3. 46 k. V (A) Lead end, IL 1. 41 k. V (A) 1. 21 k. V (A) 1. 64 k. V (A) 1. 12 k. V (A) Return end, IL 1. 31 k. V (A) 1. 61 k. V (A) 1. 42 k. V (A) 1. 47 k. V (A) § All heater passed the 650 V Hipot test after breakdown test 6
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