Electrical Quality Assurance in the LHC Tunnel (ELQA) and Magnet Polarity Coordination (Mr. Polarity)

Transcription

1 Electrical Quality ssurance in the LHC Tunnel (ELQ) and Magnet Polarity Coordination (Mr. Polarity) Stephan Russenschuck, T-MEL-EM 1

2 Electrical Quality ssurance and Mr. Polarity Electrical Quality ssurance (T-MEL-EM) To ensure the integrity of the electrical circuits during machine assembly and commissioning and to guarantee that the electrical interconnections correspond to the LHC powering layout. To ensure traceability of the checks and grant that all electrical non-conformities are considered ELQ is not concerned with the qualification of individual components (polarity, continuity, labeling, electrical integrity, voltage taps, magnet type and position) Magnet Polarity Coordination (Mr. Polarity) To ensure the coherence in the definition of the magnet polarities among MD input files, the LHC reference database, field computations, field measurements, interconnection works and the powering of electrical circuits To liaise with the different groups responsible for production, measurement, interconnection and powering of the LHC magnets, including the magnets for the arcs, the insertion regions and the transfer lines. 2

3 Sequence of ELQ ctivities Time Manufacturing of components DFX, Line N cable, - Continuity - Polarity - Electrical insulation rc Interconnection Verification - Continuity - Polarity - Electrical insulation - Global resistance, inductance - Global insulation Hardware commissioning Operation, Shutdown, repair - Insulation prior/during/after cool-down - Transfer function - Continuity

4 Circuits to be Interconnected and Tested (7-8) rc Sub-sector Matching Section Inner Triplet 200 circuits Circuit Name Powering Subsector 1 R.78.U83 CIPC.L8 2 RQD.78.U83 CIPC.L8 3 RQF.78.U83 CIPC.L8 4 RCD.781.U83 CIPC.L8 5 RCD.782.U83 CIPC.L8 6 RCO.781.U83 CIPC.L8 119 RQT4.R7.UJ76 WIPC.LR7 120 RQT5.L7.UJ76 WIPC.LR7 121 RQT5.R7.UJ76 WIPC.LR7 122 RLWH.R8.SR8 WIPC.LR8 123 RXWH.L8.SR8 WIPC.LR8 124 RXWSH.L8.SR8 WIPC.LR8 125 RXWSH.R8.SR8 WIPC.LR8 Circuit 1 has 599 elements INDEX ELECTRICL CIRCUIT ELEMENT 1 RPTE.#R.78.U83. 2 DWWCT.1.#R.78.U83 3 DWWCF.1.#R.78.U83 4 DFL.7L8.5 5 DCD.7L8.R 6 DCQ.7L8.R 7 DC.8L8.R 8 M.8L8. 9 DC.8L8.R 10 DCQ.8L8.R 11 DC.9L8.R 586 DCQ.8L8.L 587 M.8L DC.8L8.L 589 DC.8L8.L 590 DCQ.7L8.L 591 DCD.7L8.L 592 DFL.7L DWWCF.2.#R.78.U DWWCT.2.#R.78.U T.DWWCT.2.#R.78.U DQS.#R.78.U T.DQS.#R.78.U DWWCF.3.#R.78.U RPTE.#R.78.U83. Connections 1200 inductive 6700 Ultra sonic 45 resistive 4

5 Electrical Layout (1/32) 108 m 5

6 Standard Interconnection 6 x 13 k busbars 20 x Spool piece 42 multiconductor busbar M-SSS 6

7 CRETING THE ELQ TEST D SQL SCRIPTS Export Tunnel Test Laptop MS-CCESS (26000 entries) 7

8 Slot ssignment Only 50 joints / M-SSS Interconnect 8

9 N-Line Interconnection oard 9

10 N-Line Interconnection oard (2) 10

11 Manufacturing of Line N uxiliary usbar Segments Type of cable Quantity of segments Types of electrical configurations Types of plugs Position 42 wire, RC 42 wire, DS 48 wire, DS 3 wire, 6 k DS 33 different lengths spreading from 6.47 m to m 11

12 Principle of the Electrical Verification 12

13 ELQ During Machine ssembly The smallest section of the RC that can be verified is composed of two half-cells. The two associated auxiliary Line N cables must be installed. utomatic test bench Possibility to check the DS zones Tables containing cabling and tests parameters generated directly from the LHC reference database Possibility to consider accepted non-conformities affecting the segments Daily upload of test results into an ORCLE database Interface pointing to ORCLE database for activity follow-up 13

14 Hardware Design for RC and DS Verification 14

15 Functional Scheme SSS M M MC SSS M M MC SSS IFS-S IFS- IFS- IFS- IFS-C IFS-S IFS- IFS- IFS-C IFS-S Current Command Demultiplexer Left 0 Command 6 bits = zero reference fixed by the DMM 0 0 Multiplexer/Switching CH 1 CH 2 CH 5 CH 3 CH 4 Keithley DVM Multiplexer/Switching V+ V- Command 6 bits 0 Current Command Demultiplexer Right 15

16 LabVIEW pplication 16

17 LabVIEM pplication (2) 17

18 CREW Test Report 18

19 Detailed Report 19

20 ctivity Tracking 20

21 Validation of the System (Mock-up of 1 Cell) 21

22 Equipment Test (18L1) 22

23 Non-Conformity found on SSS-062 Wrong routing of V_taps Wrong labelling of bus bars Correctors on the wrong aperture EE821 EE821 V1 ES921 ES922 MQT ext V1 ES821 ES822 MQT int V2 ES822 ES821 MQT int EE921 V2 ES922 ES921 MQT ext EE921 23

24 Sherlock Holmes Conclusion Good series connections for cold tests In reality wrong series connections for cold tests has been done Re-labeling, correlation between V_taps and corrector is lost 3 EE921 2 EE821 3 EE921 2 EE821 1 V1 ES821 MQT ext V1 ES821 MQT ext ES822 4 ES822 4 V2 ES922 ES921 MQT int 1 V2 ES922 ES921 MQT int 24

25 Ready for 8 Fronts 25

26 Mr. Polarity? 26

27 Mag and eam1 Frame 4 O 4 JK 4 N O I * = +? N Remark: The mapping n n implies a rotation in mathematically negative sense which is not the same in both frames. 27

28 Conversion Table MD H Kicker V Kicker Effect on out up in down foc. eam 1 horizont. EDMS Negative Negative Positive Skew Positive (Polarity) Meas. Mag. Frame dipole -1 skew dipole -1 dipole 1 dipole 1 quad -2 28

29 Compensators in IR2 and IR8 Current into terminal = negative field = positive (outward) kick 14 ) & 0 + > K M * : 9 6 * 9, * * ) 9 * : 9 6 * = K J E * : 9 5 * : 9 0 * * 9 * : 9 5 * = ) ) ) ) ) ) ) ) (-) (-) (-) (-) (-) (+) (-) (+) 29

30 Normal Position of the Connection Terminals ) * ) * M I JH = * * * * 0 - N J H = ) F HJK H 1 J H = ) F HJK H + * ; ) * + * + ) * +, - N J H = ) F HJK H + * ; 0 + * ; 8 + * * N J H = ) F HJK H + * : + * : ) + 5 : + 6 : + 5 : : + 5 : + M I JH = 1 J H = ) F HJK H +, + +, + +, +, + * ; 8 + * ; 0 * ) * + * * + 0 * * J H = ) F HJK M I JH M I JH = - N J H = ) F HJK H 1 J H = ) F HJK H 30

31 Convention If a multipole corrector within the magnet assembly has its connection terminals facing downstream of eam 1, and if the magnet's optical function changes (depending on the multipole order), then the terminals are re-labeled. s the field quality is always measured in the mag frame, the multipole field errors have to be transformed for the MD input. If an entire magnet assembly is be installed in the LHC tunnel turned by 180 deg. around the vertical axis, then the naming of the connection terminals and are not changed. If the magnet's optical function changes, then the polarity is changed on the warm side (magnet is marked with a star in the layout). 31

32 Magnet Polarities in the Insertion Regions 14 #,..,.,, : + 5 : + : + 6 : + 5 : 3 : ) 3 5 : 3 : * 3 : * 3 : ) 3 : ) 3 : * 3 : * 3 5 : 3 : ) + 5 : + 6 : + : + 5 : : N )! ) " * " * $ *! * ) * ) * * ) * * ) * * ) * * ) * * ) * ) * * $ * " ) " )! *! ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; : + 5 : + : + 6 : + 5 : 3 : ) 3 5 : 3 : * 3 : * 3 : ) 3 : ) 3 : * 3 : * 3 5 : 3 : ) + 5 : + 6 : + : + 5 : : 14 & N.,,.,..,! "

33 Magnet Polarities in the Injection Regions,..,.,,. 14 # ) ) ) ) ) * * ) ) ) * * * * * * * ) * * ) * ) ) ) ) * ) * * ) * : + 5 : + : + 6 : + 5 : 3 : ) 3 5 : 3 : * 3 : * 3 : ) 3 : ) 3 : * 3 : * 3 5 : 3 : ) + 5 : + 6 : + : + 5 : : N )! ) " * " * $ *! * ) * ) * * ) * * ) * * ) * * ) * * ) * ) * *! * $ * " ) " )! ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ,,.,.., 14 & ) ) ) ) ) * * * ) * * * ) * * ) ) ) * ) ) * * ) * ) * ) * * ) * : + 5 : + : + 6 : + 5 : 3 : ) 3 5 : 3 : * 3 : * 3 : ) 3 : ) 3 : * 3 : * 3 5 : 3 : ) + 5 : + 6 : + : + 5 : :! " # $ %! " # $ % N )! ) " * " * $ *! * ) * ) * * ) * * ) * * ) * * ) * * ) * ) * *! * $ * " ) " )! ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;

34 DS-SSS Polarity Error During magnetic measurements tests of the DS-SSS a wrong magnetic polarity on the quadrupole of the external aperture was detected aseline Reality 7R7 F D 34

35 Design of the usbar Stabilizers RC DS 35

36 Design of the usbar Stabilizers 36

37 37 ct Locally, Think Globally Diode polarities have to be inversed Main busbars have to be crossed Schematic drawings and database layouts must be modified F D D F F D D F F D D F 7R7 8R7 9R7 10R7 11R7 12R7

38 Repair at the Manufacturer s Premises 38

39 Conclusions The tools are available: To guarantee the integrity of the electrical interconnections in the LHC tunnel To detect polarity errors in cryo-magnets We have to keep being vigilant about the coherence of procedures and definitions (inner triplets, power supplies, controls, warm leads) We are ready for 8 fronts of RC interconnection verification We need at least 3 accessible interconnection planes (SSS with jumpers and plugs) seed crystal for two fronts consists of at least 5 (9) half-cells Hope we can optimize the intervention time (co-activity) We are limited in specialists for the follow up of electrical nonconformities ELQ of LSS and hardware commissioning has to be performed in parallel 39