1. Dan Cheng, Xiaorong Wang 12/15/2015 MQXFA Connectors Discussion Part II

2. Outline 12/15/2015MQXFA Connectors Discussion2 Review of MQXFS MQXFA connectors concepts

3. Instrumentation for MQXFS 12/15/2015MQXFA Connectors Discussion3 Three main instrumentations Voltage tap (VT) (including FVT) Protection heater (PH) Strain gauge (SG) Quench antenna not covered here For each type of instrumentation, we have four main components Connectors on the coil/component level Collectors/distributors at magnet lead and return ends Jumpers between lead and return ends Pigtail between lead end and test facility (lambda plate) We will review the case for MQXFS01 and provide projections for MQXFA01

4. 12/15/2015MQXFA Connectors Discussion4 MQXFS voltage taps 16 taps per coil, 8 taps per layer – 64 taps in total In each layer, 6 taps from the lead end and 2 taps from the return end Wire: 30 AWG with Kapton/Tefzel insulation Same for MQXFA

5. MQXFS protection heaters 12/15/2015MQXFA Connectors Discussion5 6 heater strips per coil, 2 in inner layer and 4 in outer layer Same for MQXFA Maximum 6 heaters per coil MQXFS01: 4 heaters per coil (configured 2 heater circuits for outer layer, due to FNAL limitations) 16 heaters in total Wire: 16 AWG with Kapton/Tefzel insulation Heater configuration TBD for MQXFA (see later slides) Inner layer: 2 strips Outer layer: 4 strips

6. MQXFS strain gauges 12/15/2015MQXFA Connectors Discussion6 Coils: LARP: 1 station per coil, azimuthal (T) + TComp. and axial (Z) + TComp., 8 wires/coil, 32 wires/magnet CERN: 1 station per coil, 5 wires per T&Z, 10 wires/coil, 40 wires/magnet Shell: 1 shell with 4 stations, azimuthal (T) + TComp. and axial (Z) + TComp., 32 wires per magnet CERN: 4 stations, 5 wires per T&Z, 40 wires per magnet Rods: LARP only: 1 full bridge per rod, not temperature compensated, 4 wires per rod, 16 wires per magnet To be discussed in later slides: Current proposal for MQXFA (LARP/CERN) will triple: Three stations per coil (24/30 wires/coil, 96/120 wires/magnet) Three shells to be instrumented (96/120 wires per magnet) Rods may be CERN-style only, 20(?) wires per magnet LARP Wire: 4-wire shielded cable, 30 AWG (Vishay 430-FST) CERN Wire: 30 AWG with Teflon (Nexans KZ04-02)

7. MQXFS: other wiring 12/15/2015MQXFA Connectors Discussion7 Cooling-hole jumper to bring the signals from the return end to lead end Contained in one of the four cooling holes that is expected to be compatible with MQXFA (along with BNL LHe fill tube) Fixed voltage tap (FVT) for quench detection Whole magnet ¼ magnet, ½ magnet, and ¾ magnet These wirings are done at the splice box Wire: 30 AWG with Kapton/Tefzel insulation Pigtail to bring the signals from magnet to FNAL lambda plate FNAL provides the definition on connector type, layout and pinout Power-lead wire for monitoring the NbTi lead quench A pair of wire following the positive and negative lead from the NbTi/Nb3Sn splice to FNAL header Wire: 30 AWG with Kapton/Tefzel insulation

8. MQXFS skirts 12/15/2015MQXFA Connectors Discussion8 Platforms with interface connectors at both magnet ends

9. Connector layout at MQXFS1 return end 12/15/2015MQXFA Connectors Discussion9 PH distributor Coil collector VT distributor

10. Connector layout at MQXFS1 lead end 12/15/2015MQXFA Connectors Discussion10 SG distributor VT distributor

11. MQXFS1, viewed from LE 12/15/2015MQXFA Connectors Discussion11

12. MQXFS1 Lead End 12/15/2015MQXFA Connectors Discussion12

13. 12/15/2015MQXFA Connectors Discussion13 MQXFA voltage taps Should not change from MQXFS to MQXFA: 16 taps per coil, 8 taps per layer – 64 taps in total In each layer, 6 taps from the lead end and 2 taps from the return end Wire: 30 AWG with Kapton/Tefzel insulation

14. MQXFA Protection Heater Configuration 12/15/2015MQXFA Connectors Discussion14 Constraint: V max = 450 V at BNL Inner heater strip voltage should be at least 322 V to deliver 200 A Desired feature: powering the heaters on one side of the coil 4 heater circuits per coil Inner layer: 2 circuits, each strip is a circuit Outer layer: 2 circuits, 2 strips in series to become a circuit Same number of wires as MQXFS1 magnet

15. MQXFA Protection Heater Connection 12/15/2015MQXFA Connectors Discussion15 Circuit 1 Circuit 2 Inner layer: 2 circuits Outer layer: 2 circuits Circuit 1 Circuit 2 In series

16. SG Connector proposal for MQXFA 12/15/2015MQXFA Connectors Discussion16 Current proposal for MQXFA (LARP/CERN) will triple: Three stations per coil (24/30 wires/coil, 96/120 wires/magnet) Three shells to be instrumented (96/120 wires per magnet) Rods may be CERN-style only, 20(?) wires per magnet LARP Wire: 4-wire shielded cable, 30 AWG (Vishay 430- FST) CERN Wire: 30 AWG with Teflon (Nexans KZ04-02) Use 40-pin 3M connectors for higher density for both shells and coils; Rods TBD, depending on wiring scheme

17. MQXFA Coil Strain Gauges Proposal 12/15/2015MQXFA Connectors Discussion17 4x 30 wires 4x 40-pin 3M connectors 4 coils; 3 SG stations, 10 wires each Pigtail converts from 4x 40-pins to 3x 40 pins

18. MQXFA rods strain gauges 12/15/2015MQXFA Connectors Discussion18 No details yet on the wiring scheme for the full bridges on the axial rods Rods may be CERN-style only, 5-6 wires each, sowe expect 20-24(?) wires per magnet TBD

19. Connectors concept for MQXFA, LE 12/15/2015MQXFA Connectors Discussion19 SG distributor VT distributor Rotate all connectors 90° to face axially Hypertronics conn. to be replaced, 4x 3x 3M 40-pin package shown (x2)

20. MQXFA concept, rotated connector skirts, LE 12/15/2015MQXFA Connectors Discussion20 This SG area can be replaced with 40-pin 3M connectors All connectors will be turne 90° to face axially

21. Additional Slides 12/15/2015MQXFA Connectors Discussion21

22. Inner layer protection heaters 12/15/2015MQXFA Connectors Discussion22

23. Outer layer protection heaters 12/15/2015MQXFA Connectors Discussion23

24. 5th May 2014 J.C. Perez24 Instrumentation & QH wires Instrumentation wires: AXON reference HH2619 LH Conductor diameter 0.504 mm (0.15 mm 2 ) Conductor composition: Copper silver plated External wire diameter: 0.95 mm Wire insulation: polyimide tape wrapped (glued with a thin layer of fluoopolymer) Nominal voltage : 1000V AC Axon voltage test: (2*U N )+1000V= 3 kV Approx. price: 2220 €/km Quench heaters wires: AXON reference H 1619 L Conductor diameter 1.5 mm (1.34 mm 2 ) Conductor composition: Copper silver plated External wire diameter: 1.8 mm Wire insulation: polyimide tape wrapped (glued with a thin layer of fluoropolymer) Nominal voltage : 600V AC Axon voltage test: (2*U N )+1000V= 2.2 kV Approx. price: 4500 €/km

25. Connectors used on the vertical cryostat in SM18 5th May 2014 J.C. Perez25