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MAC 22, 6. 12. 2007, KHM-AT-MEL, on behalf of the Commissioning Team 1 On behalf of the Commissioning Team Commissioning of the Main Circuits And many,

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Presentation on theme: "MAC 22, 6. 12. 2007, KHM-AT-MEL, on behalf of the Commissioning Team 1 On behalf of the Commissioning Team Commissioning of the Main Circuits And many,"— Presentation transcript:

1 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 1 On behalf of the Commissioning Team Commissioning of the Main Circuits And many, many more

2 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 2 Commissioning of the Main Circuits  Introduction  Main Circuits Defined here as >600A nominal Complexity History of events  Quench Protection  Lessons learned  In the Power Converter talk: –All Energy extraction tested before and OK –All Quench Protection installed and tested (but for the true signals)

3 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 3 LHC Overview

4 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 4 LHC Overview Sector 7-8, May - June Sector 4-5, Nov - Dec

5 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 5 Complexity

6 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 6 Complexity

7 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 7 Complexity

8 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 8 “Was man schwarz auf weiss besitzt…”

9 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 9 “Was man schwarz auf weiss besitzt…”

10 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 10 Tests of “Main Circuits”  Sector 7-8 (in total ~22 days for >600A circuits) –Test of D2, Q4, Q5 (~14 days) A Puzzle to be solved –Test of QD, QF (~5 days) –Test of MB (~5 days)  Sector 4-5 (in total 3 days and today magnet tests) –Test of Q6  In 24 days 7 main circuits tested, –3 of which fully tested

11 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 11 The D2 Q4 puzzle  The MS was cold first (4.4 K), hence the test started there  D – (after 4 days of testing)  Q close to nominal quench while changing Beam1 circuit –Improvement of diagnostics. –Looking into possible links: D2 and Q4 share conductors of a cable (non-conformity) Likely movement between the two cables, when Q4-B1 is powered  Slow changes and shaking Q4 and D2  Problem disappeared

12 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 12 First Indication of Linkage between D2 & Q4 D2 Spontaneously Quenches as it approaches Nominal 50 mS later Q5 Trips due to QPS Imbalance 500 mS later Q4 Quenches but Why???

13 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 13 D2, Q5, Q4, 13.June 07

14 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 14 BNL testing LHC D2 L8 First magnet to reach nominal (29.5) The MS was cold first (4.4 K), hence the test started there (after 4 days of testing) D2 See later Courtesy Glyn Kirby

15 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 15 A.Ballarino D2 at 6000 A (~15 hours run )

16 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 16 QPS trip ? at nominal (D2 at 0) Q4, shares the DFBM with the D2 Courtesy Glyn Kirby

17 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 17 Consists of 2 MQM Q5 Courtesy Glyn Kirby

18 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 18 The D2 Q4 puzzle The D2 was quenching when the Q4-B1 was at high value The Quench was likely in the part, where the power busses are in the DFBM “side-by-side”

19 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 19 The D2 Q4 puzzle Once the cable where shaken into place, no quench occurred any more

20 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 20 RQ and RB  RQ circuits limited due to high-pot problems –Chosen was 6500 A max  RB circuit limited by one faulty dipole –Chosen was 2000 A max  Note that both current levels were conservative.  The energy extraction was tested before

21 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 21 A.Ballarino RQD at 6500 A (~15 hours run )

22 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 22 Inductive Discharge Voltage +1V Diode Drop Volts Voltage going into Coil Voltage coming out of Coil Quench Balance Signal (∑) x10 Heaters Fire and EE Switch Opens Diode switches ON at -6 Volts Diode Performance during 6.5 kA Quench of Main Quad QD.12R7 Artificial Test Ramp Up==> Trip at 100 mV Quench Driven Polarity Reversal

23 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 23 July 4 th RB, QF, QD

24 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 24 RQ6.R4, yesterday!!!!  Powered to Nominal 3610 Amps –in Both Apertures  No Spontaneous Quenches  No False Quench Detections  Lead Provoked Test Quenches –Symetric & Asymetric  No Problems ! Courtesy Robert Henry Flora

25 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team Amp Quench, Q6.L4 (MQY) Yes, these are two curves! Both apertures quench identically! That is to say: inductance, resistance, heaters and heat conduction are identical! Courtesy Robert Henry Flora

26 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 26 Half Coil Voltages (resistive +inductive) B1 B2 100 ms Courtesy Robert Henry Flora

27 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 27 Quench Discharge Rate Amp sec dI dt Magic button Change of rate as already visible in the voltage Courtesy Robert Henry Flora

28 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 28 Discharge Growth Rate d2Id2I dt 2 Amp sec 2 Courtesy Robert Henry Flora Layer jump??

29 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 29 Asymmetric Quench B1 B2 Courtesy Robert Henry Flora

30 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 30 Quench Discharge Rate Amp sec dI dt B1 B2 Courtesy Robert Henry Flora

31 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 31 Quench Protection  The Quench Protection was requested to run in 7-8 at 5 times lower threshold than design Voltage over the current leads of RQF during a provoked 6.5 kA quench

32 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 32 Quench Protection  The Quench Protection was requested to run at 5 times lower threshold than design No real problem for the main circuits, problems for the corrector circuits

33 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 33 Lessons learned (?)  By now well prepared procedures  Highly motivated and well trained people  A good team  Good software support, displays etc, some minor hick-ups  Circuits without problems are very rapidly tested  Several tests possible at the same time  Organization has much improved  Magnets no problem so far  Current Leads no problem  Energy Extraction no problem (so far)  Quench Protection no problem (so far)  Bus bars in the DFB can move due to non-conform manufacturing  We need stable testing conditions!

34 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 34 End

35 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 35 Table 1. List of distribution of busbars in DFBAs with NC in 6kA cabling DFB Sect. IR Cable 1 Cable 2 Cable 3 Cable 4 DFBAO 7-8 8L cabling not checked cabling not checked cabling not checked cabling not checked DFBAA 8-1 1L Q9C Q9A Q7B Q10A Q10B Q10C Q7A Q7C Q8B Q8A Q8B Q9B DFBAP 8-1 8R Q8A Q8C Q10C Q9C Q9B Q8C Q7A Q7B Q9A Q10A Q10B Q7C DFBAH 4-5 4R Q7C Q10B Q9B Q9A Q8B Q9C Q8A Q7A Q8C Q7B Q10A Q10C DFBAI 4-5 5L Q8A Q8B Q10B Q7A Q7C Q8C Q9B Q9C Q7B Q10A Q10C Q9A Table 3. Distribution of busbars in DFBLs with NC DFB Sect. IR Cable 1 Cable 2 Cable 3 Cable 4 DFBLA 8-1 1L D2A D2B Q6A Q6B Q6C nu Q4A Q4B Q4C Q5A Q5B Q5C DFBLB 1-2 1R D2A D2B Q6A Q6B Q6C nu Q4A Q4B Q4C Q5A Q5B Q5C DFBLD 4-5 5R D2A D2B Q6A Q6B Q6C nu Q4A Q4B Q4C Q5A Q5B Q5C Cable NC

36 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 36 Q4-D2 movements Displacements from J.P.Quesnel, 12 Feb.’07 Top view Side view Q4 D2 Q4 ~10 mm ~7mm ~7mrad ~0.9 mrad ~10 mm 80 kN

37 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 37 Photo Gallery Tack welded stud Uprooted longitudinal jack radial jack at end of free movement Bus bar line with fixed point

38 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 38 Magnet or Bus-”pig-tail” Magnet Quench 190mV 10 ms 19 V/s D2 Quench Development 5269A 31 st 16:07 D2,Q5,Q4 Quench D2 5280A quench 24 th Q4 training Quench At Nom 3610A 20 ms 50mV 2.5 V/s 16 ms 30mV 1.87 V/s Q4 Quench Development 3128A Q4 Quench Development 3610A D2 Quench at BNL ~ 7 V/s from 5274 A (No R.T. leads and bus)

39 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team to 80 ms Heater delay Heaters triggered 20 mV threshold 10ms verification D2 quench at 5280A 31 st May 2.5 V/s

40 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 40 Q4 B1 Q4 B2 Q4 300A Quench / trip 10ms verification Heaters 20 mV threshold 10ms verification Heaters Q5 trip at ~3800A due to threshold imbalance after D2 quench

41 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team A 6000 A A 20K gas 50K With Current 70K No Current LIQUID Helium covering LTS !! Level should be correct in each chimney 4.5K liquid in HTS Nominal Operating conditions for HTS leads 600 A, 6000 A & A Ref. LHC-DFL-ES LHe Level (Section 7.6) – In each chimney, it can vary over a length of 4 cm from the bottom end of the lead. LHe level max = 5 cm measured from the bottom end of the lead. 2. Temperature of cooling gas < 25 K (Section 3.2) From 70 K to 50 K: 1/2 hour before powering? Before powering: checks according to EDMS (The commissioning of the DFBs) Cryo start Cryo-maintain

42 MAC 22, , KHM-AT-MEL, on behalf of the Commissioning Team 42 6KA D2 Pig-Tail 20mV or 50mV threshold 20 mV 350 K (OK) 70 ms Too Hot 70 ms


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