MPE Workshop for LS1 / 22 23 Nov. 2012, G. DAngelo TE/MPE-EE ELQA during LS1 train, Special...

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ELQA during LS1 train, Special measurements

and NCsMagnet replacement: AIV

Splices consolidations: PAQ_LS1

Non Conformities

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Arc Interconnection Verification: magnet replacement

• What is A.I.V. ?

• Why is it needed?

• How is it performed?

• When is it performed?

• ELQA resources estimated?

• Safety issues

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• What is A.I.V. ?o It is a test that verifies the continuity and polarity of the ARC and DS

superconducting circuits during the assembly phase of the machine.

o The Line N circuits and the Spools circuits are checked.

o HVQN is part of AIV. It verifies the electrical continuity and High Voltage insulation (1000V) of the Line N:• After removal• After transport, before reinstallation, laying down• After re-insertion, before connection

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• How is AIV performed?• AIV is performed in two steps AIV1 (Line N inserted before US welding)

and AIV2 (Line N US welded). • The continuity of a circuit is checked by sensing a current at both sourcing

and sinking ends. The polarity and the type of the connected magnet are checked by measuring the expected voltage between the magnet voltage tap i.e. the port A and the sinking end

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• When is it performed?During LS1, AIV must be performed whenever a

magnet is being replaced: 19 magnets !

RE1

8

RE

22

RE2

8

UJ3

2

RE3

8

RE

42

RE4

8

RE5

2

RE5

8

RE

62

RE

68

RE7

2

RE7

8

RE8

2

RE8

8

RE

12

Pt 5 LSSArc 23 LSS Pt 3 LSS Arc 34 LSSPt 1 LSS Arc 12 LSS Pt 2 LSS

MAY MAY

Arc 81 LSSR2E R2E R2E

Pt 7 LSS Arc 78 LSS Pt 8 LSSArc 56 LSS Pt 6 LSS Arc 67 LSSPt 4 LSS Arc 45 LSS

APR

8 8

1 1

FEB FEB

2013

2013

2 2

3 3

MAR MAR

4 4

5 5

6 6

7 7

12

APR9 9

10 10

11 11

16 16

13 13

14 14

15 15

12

JUNE

17 17

JUNE18 18

19 19

AUG AUG

26 26

27 27

20 20

JULY

21 21

JULY22 22

23 23

28 28

29 29

30 30

24 24

25 25

SEPT SEPT31 31

32 32

33 33

34 34

42 42

OCT OCT

35 35

36 36

37 37

38 38

47 47

JAN JAN

48 48

43 43

DEC DEC44 44

45 45

46 46

NOV

39 39

NOV40 40

41 41

2014

2014

49 49

50 50

51 51

52 52

FEB FEB53 53

54 54

55 55

56 56

MAR MAR57 57

58 58

59 59

60 60

APR APR

61 61

62 62

63 63

64 64

69 69

JUNE JUNE70 70

71 71

72 72

MAY MAY

65 65

66 66

67 67

68 68

73 73

JULY JULY

74 74

75 75

76 76

77 77

AUG

78 78

AUG79 79

80 80

81 81

82 82

SEPT SEPT83 83

84 84

85 85

86 86

OCT OCT

87 87

88 88

NOV NOV92 92

93 93

94 94

89 89

90 90

91 91

DEC

95 95

DEC96 96

97 97

98 98

99 99

DFBAK

Cabl

ing

Cam

paig

n

CRYO

CRYO

CRYO

CRYO

EPC 60A

EPC 60A

VSC IV

EPC 60A

EPC 60A

MPE

EE

MPE

EE

MPE EE

DYPBDYPB

DYPB

DYPB

Cool-Down

Cool-Down

Cool-Down

Cool-Down

IC train

ELQA

Powering tests

ELQA

UPS

ELQA

Leak tests

Powering tests

ELQA

Warm Up

IC train

Cool-Down

UPS

Preparation

Flushing

IC train

Powering tests

Powering tests

IC train

IC train

Powering tests

ELQA

Preparation

Flushing

Powering tests

ELQA

Wat

er C

oole

d ca

bles

MKI

gene

rato

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aint

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Wat

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WARM UP

ELQA

POWERING TESTS

UPS

POWERING TESTS

ELECTRICAL Maint. (No access)


PREPARATION

FLUSHING

COOL DOWN

FLUSHING

PREPARATION

C15R1 A

22R1

C30R1

C33R1

C33L2

A29L2

B25R2

A23R2 C

15L3

Q7R3

Q23R3

Q26R3

Q27R3

B32R3

C17R4

B31R4

Colli

mat

or c

ontr

ol

Colli

mat

or c

ontro

lM

KI ge

nera

tors

MKQ

ARF

ACS

Wat

er C

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ance

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dd. t

ank

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ener

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paig

n

CV a

ctivi

ties

UPS

relo

catio

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blin

g fo

r cry

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ield

ing

C15R

1

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ELQA

Warm Up

ELQA

Leak tests

A22R

1

C30R

1

C33R

1

C33L

2

A29L

2

UPS

Preparation

Flushing

Warm Up

ELQA

ELQA

Leak tests

A23R

2

B25R

2

IC train

Warm up

ELQA

CSCM

ELQA

Leak tests

Q7R

3

Q23

R3

A26R

3

Q27

R3

B32R

3

Preparation

Flushing

Powering tests

ELQA

C17R

4

B31R

4

UPS

UPS

Preparation

Cool-Down

Flushing

Powering tests

ELQA

ELQA

Warm Up

ELQA

Leak tests

Powering tests

ELQA

Warm Up

ELQA

Leak tests

UPS

UPS

ELQA

Powering tests

ELQA

Preparation

ELQA

Leak tests

UPS

Powering tests

ELQA

Powering tests

ELQA

Warm Up

IC train

PreparationFlushing

Flushing

UPS

Cool-Down

Powering tests

Preparation

Flushing

IC train

ELQA

Leak tests

Powering tests

ELQA

Warm Up

Electrical maintenance - No access

Cabl

ing

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paig

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Cam

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n

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paig

n

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latio

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ater

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ca

bles

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III)

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inee

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tecti

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ss

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ater

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led

cabl

es

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UPS

UPS

UPS

UPS

UPS

UPS

UPS

UPS

UPS

UPS

UPS

UPS

UPS

UPS

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8

C15L

3

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B21L

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l eng

inee

ring

(inc

l. pr

otec

tion

)

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tym

pan

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lddi

ng R

R 53

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lddi

ng R

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m (

I)

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ay

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ngO

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ks

Ethe

rnet

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e ra

cks

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mis

ioni

ng o

f

0 0

DYPB

DYPB

DYPB

DYPB + MPE EPDYPB + MPE EP

VSC IV

VSC IV

VSC IV

EPC 60A

EPC 60A

EPC 60A

EPC 60A

EPC 60A

EPC 60A

EPC 60A

EPC 60A

ELQA

Powering tests

MPE EP

MPE EP

MPE EP

MPE EP

MPE EP

DYPB

DYPB

UTA

Cabl

ing

Cam

paig

n

Cabl

ing

Cam

paig

n

Cabl

ing

Cam

paig

n


Cabl

ing

Cam

paig

n

Cabl

ing

Cam

paig

n

DFBX

Cabl

ing

Ca

m

Cabl

ing

Cam

paig

n

AUG Tests AUG Tests

AUG Tests

AUG Tests

DSO Tests

REPAIR LEAKS IN QRL 4-5

AUG Tests

UPS

UPS

UPS

CRYO

CRYO

CRYO

CRYO

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBX

DFBX

DFBX

DFBX

DFBX

DFBX

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

MPEEE



Voies EvacuationVoies Evacuation




Voies Evacuation

SF-M

SF-

W

UW-M

SF-M1

SF-W

UW-M

UW-W

UW-M

UW-W

UW-M

SF-M

SF-

W

UW-

W

SF-

M

SF-M

UW-

M

SF-M

UW-

SF-M

UW-

SF-M

UW-

SF-

M

UW-

W

DYPB

DYPB

DYPB

DYPB

DYPB

DFBA

MKI

Beam

Vac

uum

A7L1

A4L1

A6L1

A1L1

Beam

Vac

uum

A1R1

A4R1

A6R1

A7R1

Beam

Vac

uum

MKI

TDI

A6L2

A1L2A4L2

B1L2

A7L2

I5L2

A5L2

C4L2

Beam

Vac

uum

A1R2

A4R2

A5R2

A7R2

Beam

Vac

uum

A7L3

B5L3

A5L3

A4L3

IP3

A5R3

B5R3

A7R3

Beam

Vac

uum

A7L4E5L4D5L4B5L4D5R

4E5R4

IP4A6R

4

A7R4

Beam

Vac

uum

A7L5

A6L5B4L5

A1L5A5L5A4L2

Beam

Vac

uum

A1RA4RA5R

B4R5

A6RA7R

Beam

Vac

uum

E5L6

A5L6

A4L6

IP6

IP6

A4R6

C5R6

A5R6

Beam

Vac

uum

A7L7

A7R7

A67B57A57IP7A4RA5RB5RA6R

Beam

Vac

uum

A7L8

A6L8A5L8A1L8

A4L8

Beam

Vac

uum

A4RA1RI5RA6R

B4R8

C4R8

A5R8

MKI

A7R8

Christmas

Cabl

ing

Cam

paig

n

Cabl

ing

Cam

paig

n

Cabl

ing

Cam

paig

n

Cabl

ing

Cam

paig

n

Cabl

ing

Cam

pai

gn

Cabl

ing

Cam

paig

n

Test AUG (R2E)- No access

Safe

Roo

m (

II)

Test Fire Detection(R2E) - No access

Test Fire Detection (R2E) - No access

Start Cabling

Test AUG (R2E) - No accessAUG TestsAUG Tests

Modification ODH (R2E) - No Access

Detection Incendie/GAZ_QUARTERLY


Detection Incendie/GAZ_QUARTERLYDetection Incendie/GAZ_QUARTERLY

Detection Incendie/GAZ_QUART

ERLY







Detection Incendie/GAZ_QUARTE

RLY








RLY




AUG Tests

VSC IV


DFBX

Detection Incendie_ANNUAL

ODH_ANNUAL


ODH_ANNUALODH_ANNUAL

FLASH TEST ODH_ANNUAL








ODH_ANNUALODH_






ODH_ANNUALODH_






ODH_ANNUALODH_A












ODH_ANNUALODH_






ODH_ANNUALODH_



ODH_ANNUAL





ODH_ANNUALODH_A


OF_CONOF_CON

OF_CON

OF_CON

OF_CO

OF_REM

OF_REM

OF_REM

OF_REM

OF_REM

OF_REM

O_REMF

OF_REMO

O

OF_CONOF_CO

OF_REM

OF_REM

O

O

OO

O

O

A.I.V activity start in June 2013 and finish October 2013

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• ELQA - AIV resources?o Hardware: we have 2 AIV measuring systems available. One system

is needed per AIV test.o Test duration: once the measuring system is installed on place (need

Pefra to transport it), the test duration is about 2 hours / AIV test.o Manpower planed: 1 team of 3 persons from HNINP, can be doubled

if needed.

0

2

4

6

8

10

12 PAQ & AIV with Line N

W.P. 2 Ext. Tecnicians*months

W.P. 2 Ext. Engineers*months

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• ELQA - AIV resources?o Manpower : we should be able to cope our needs with the

collaboration from HNINP and the CERN staff from EE section.o Software: AIV is based on a Labview program, already used during

machine assembly (WinXP). We will not invest resources to update the program.

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• Safety issue?o The area under test is patrolled by the ELQA team before

starting the test.o One person has to be present at each extremity of the

test area during all the time when the high voltage is applied.

o Habilitation éléctrique B1o Standard safety course to access the tunnelo Safety equipment to access the tunnel: helmet, front light,

safety shoes, bio-cell, jacket…

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Partial Assembly Qualification during LS1: “train” follow-up

• What is PAQ during LS1 ?

• What are the requirements?

• Duration for PAQ test?

• PAQ resources?

• PAQ safety issue?

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What is PAQ during LS1

• What is Partial Assembly Qualification for LS1 ?

o Initially used during LHC assembly, the procedure is adapted for LS1 condition: segment length is the whole sector!

o The PAQ test consists of two steps of verifications:• Electrical continuity verification of spool-pieces circuits

(M1 and M2 lines).• High Voltage qualification on RB (in M3 line), RQD, RQF

and Spool-pieces circuits , (M1 and M2 lines).

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PAQ configuration during LS1

o Configuration of a sector during consolidation:

All busbars must be kept insulated from each other and from ground at each level of the consolidation work. This is the duty of the consolidation work teams.

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PAQ requirements during LS1

• What are the requirements from ELQA for PAQ during LS1 «train» follow-up ?o DC warm cables must be disconnected from the current leads, the

instrumentation cables as well (ELQA team, already done during TP4 campaign)

o Before starting the consolidation of a sector, the insulation must be removed from RB, RQD, RQF and the spool circuits open at one interconnection on the odd point TE/MSC-LMF

o These conditions must be kept during the whole period of splices consolidation in the sector.

o Preparation work for PAQ test will start before 17:00. At 17:00 (5PM), the consolidation work, including QC must be completed. The patrol will start at 5PM. During High Voltage test, no personnel but ELQA team must stay in the ARC (safety condition).

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PAQ: How long does it last?

• When is it performed?During LS1, PAQ must be performed during the whole

period of splice consolidation, daily basis, from 5PM!

RE1

8

RE

22

RE2

8

UJ3

2

RE3

8

RE

42

RE4

8

RE5

2

RE5

8

RE

62

RE

68

RE7

2

RE7

8

RE8

2

RE8

8

RE

12

Pt 5 LSSArc 23 LSS Pt 3 LSS Arc 34 LSSPt 1 LSS Arc 12 LSS Pt 2 LSS

MAY MAY

Arc 81 LSSR2E R2E R2E

Pt 7 LSS Arc 78 LSS Pt 8 LSSArc 56 LSS Pt 6 LSS Arc 67 LSSPt 4 LSS Arc 45 LSS

APR

8 8

1 1

FEB FEB

2013

2013

2 2

3 3

MAR MAR

4 4

5 5

6 6

7 7

12

APR9 9

10 10

11 11

16 16

13 13

14 14

15 15

12

JUNE

17 17

JUNE18 18

19 19

AUG AUG

26 26

27 27

20 20

JULY

21 21

JULY22 22

23 23

28 28

29 29

30 30

24 24

25 25

SEPT SEPT31 31

32 32

33 33

34 34

42 42

OCT OCT

35 35

36 36

37 37

38 38

47 47

JAN JAN

48 48

43 43

DEC DEC44 44

45 45

46 46

NOV

39 39

NOV40 40

41 41

2014

2014

49 49

50 50

51 51

52 52

FEB FEB53 53

54 54

55 55

56 56

MAR MAR57 57

58 58

59 59

60 60

APR APR

61 61

62 62

63 63

64 64

69 69

JUNE JUNE70 70

71 71

72 72

MAY MAY

65 65

66 66

67 67

68 68

73 73

JULY JULY

74 74

75 75

76 76

77 77

AUG

78 78

AUG79 79

80 80

81 81

82 82

SEPT SEPT83 83

84 84

85 85

86 86

OCT OCT

87 87

88 88

NOV NOV92 92

93 93

94 94

89 89

90 90

91 91

DEC

95 95

DEC96 96

97 97

98 98

99 99

DFBAK

Cabl

ing

Cam

paig

n

CRYO

CRYO

CRYO

CRYO

EPC 60A

EPC 60A

VSC IV

EPC 60A

EPC 60A

MPE

EE

MPE

EE

MPE EE

DYPBDYPB

DYPB

DYPB

Cool-Down

Cool-Down

Cool-Down

Cool-Down

IC train

ELQA

Powering tests

ELQA

UPS

ELQA

Leak tests

Powering tests

ELQA

Warm Up

IC train

Cool-Down

UPS

Preparation

Flushing

IC train

Powering tests

Powering tests

IC train

IC train

Powering tests

ELQA

Preparation

Flushing

Powering tests

ELQA

Wat

er C

oole

d ca

bles

MKI

gene

rato

rs m

aint

enan

ce

Wat

er C

oole

d ca

bles

WARM UP

ELQA

POWERING TESTS

UPS

POWERING TESTS



PREPARATION

FLUSHING

COOL DOWN

FLUSHING

PREPARATION

C15R1 A

22R1

C30R1

C33R1

C33L2

A29L2

B25R2

A23R2 C

15L3

Q7R3

Q23R3

Q26R3

Q27R3

B32R3

C17R4

B31R4

Colli

mat

or c

ontr

ol

Colli

mat

or c

ontro

lM

KI ge

nera

tors

MKQ

ARF

ACS

Wat

er C

oole

d ca

bles

Colli

mat

or c

ontr

ol

Wat

er C

oole

d ca

bles

MKD

mai

nten

ance

& a

dd. t

ank

MKD

mai

nten

ance

& a

dd. t

ank

MKD

& M

KB g

ener

ator

s mai

nten

ance

Colli

mat

or c

ontro

l

Colli

mat

or c

ontro

l

Colli

mat

or c

ontro

l

Wat

er C

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d ca

bles

Cabl

ing

Cam

paig

n

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EPC 60A

EPC 60A

EPC 60A

EPC 60A

EPC 60A

EPC 60A

ELQA

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MPE EP

MPE EP

MPE EP

MPE EP

MPE EP

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AUG Tests

AUG Tests

DSO Tests

REPAIR LEAKS IN QRL 4-5

AUG Tests

UPS

UPS

UPS

CRYO

CRYO

CRYO

CRYO

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBA

DFBX

DFBX

DFBX

DFBX

DFBX

DFBX

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

QRL service Modules

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SF-M

SF-

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SF-W

UW-M

UW-W

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SF-M

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UW-

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SF-

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SF-M

UW-

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SF-M

UW-

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UW-

SF-M

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DYPB

DYPB

DYPB

DYPB

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A7L1

A4L1

A6L1

A1L1

Beam

Vac

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A1R1

A4R1

A6R1

A7R1

Beam

Vac

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MKI

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A6L2

A1L2A4L2

B1L2

A7L2

I5L2

A5L2

C4L2

Beam

Vac

uum

A1R2

A4R2

A5R2

A7R2

Beam

Vac

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A7L3

B5L3

A5L3

A4L3

IP3

A5R3

B5R3

A7R3

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Vac

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A7L4E5L4D5L4B5L4D5R

4E5R4

IP4A6R

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A7R4

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Vac

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A7L5

A6L5B4L5

A1L5A5L5A4L2

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Vac

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A1RA4RA5R

B4R5

A6RA7R

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Vac

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E5L6

A5L6

A4L6

IP6

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C5R6

A5R6

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A7L7

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Beam

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A7L8

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A4L8

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Test AUG (R2E)- No access

Safe

Roo

m (

II)

Test Fire Detection(R2E) - No access

Test Fire Detection (R2E) - No access

Start Cabling

Test AUG (R2E) - No accessAUG TestsAUG Tests

Modification ODH (R2E) - No Access




Detection Incendie/GAZ_QUART

ERLY








RLY








RLY




AUG Tests

VSC IV


DFBX


ODH_ANNUAL











ODH_ANNUALODH_






ODH_ANNUALODH_






ODH_ANNUALODH_A












ODH_ANNUALODH_






ODH_ANNUALODH_



ODH_ANNUAL





ODH_ANNUALODH_A


OF_CONOF_CON

OF_CON

OF_CON

OF_CO

OF_REM

OF_REM

OF_REM

OF_REM

OF_REM

OF_REM

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PAQ activity start in May 2013 and finish April 2014

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PAQ resources during LS1

• ELQA resources?o Hardware: we will have up to 8 TP4 measuring systems. One system

is needed per PAQ test.o Test duration: once the measuring system is installed on place (need

Pefra to transport it), the test duration is about 1.5 hours / PAQ test, without any fault !

o Manpower: 2 teams of 3 persons (HNINP) + CERN Staffo Software: use TP4 software (HNINP+ M.B.) and signature WISH tool

(SMACC)

0

2

4

6

8

10

12 PAQ & AIV with Line N

W.P. 2 Ext. Tecnicians*months

W.P. 2 Ext. Engineers*months

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PAQ safety issues during LS1

• For safety issueo Put the blinking warning lights on both extremities of the part of the

subsector under test. Lamps should be placed in a visible position on the floor.

o The area under test is patrolled by the ELQA team before starting the test to ensure that no one is in the subsector under test

o One person has to be present at each extremity of examined length during all the time when the high voltage is applied.

o During the patrol, verify that the segment under test is insulated from anything else (visual inspection).

o Habilitation éléctrique B1o Standard safety course to access the tunnelo Safety equipment to access the tunnel: helmet, front light, safety

shoes, bio-cell, jacket…o Will finish “late at night”. Cars are foreseen for teams in the tunnel!

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No 1-2 EDMS HWC phase Circuit Equipment Application System Date Current Status MTF Status EDMS Description

50 QN-ELQA-MIC-C-HVQ-LQXAA.1R1.001 1017174 Cold LQXAA.1R1HCLQXA_001-FL000006HVQN QH 26-Aug-09 MP3 action OK InitiatedOn DFBXB_3R1, quench heater YT1121 of magnet Q1 is showing a weak electrical insulation to ground (Breakdown at 1100 Volts). P lease refer to the attached excel document for a full diagnostic of all quench heaters of this inner triplet.

55 QN-ELQA-TP4E-HVQ-RCO.A12B2-001 1193222 Cold RCO.A12B2 HVQ 21-Feb-12 TE/MPE action OK InitiatedDuring the high voltage qualification of RCO.A12B2 circuit, the leakage current was too high (about 1mA).The problem comes most probably from the Lemo connector used to rout the

56 QN-ELQA-TP4E-HVQ-RCBCH6.L2B2-0011195151 Cold RCBCH6.L2B2 HVQ 22-Feb-12 TE/MPE action OK InitiatedFollowing the breakdown that occurred on the RCO.A12.B2 (see NC 1193222), it was decided to repeat the qualification of the circuit where the instrumentation is routed in the same connector.

58 QN-ELQA-TP4E-ICC-RCOX3.L2-001 1203477 Cold RCOX3.L2 ICC 6-Mar-12 TE/MPE action OK InitiatedFollowing the X-mas beak 2011-12, this circuit has been found open. Diagnostic ongoing.The diagnostic performed by ELQA team confirms that the circuit is open in the

59 QN-ELQA-TP4E-ICC-RCOSX3.L2-001 1203478 Cold RCOSX3.L2 ICC 6-Mar-12 TE/MPE action OK InitiatedFollowing the X-mas beak 2011-12, this circuit has been found open. Diagnostic ongoing.The diagnostic performed by ELQA team confirms that the circuit is open in the

60 QN-ELQA-TP4E-ICC-RCSSX3.L2-003 1203479 Cold RCSSX3.L2 ICC 6-Mar-12 TE/MPE action OK InitiatedFollowing the X-mas beak 2011-12, this circuit has been found open. Diagnostic ongoing.The diagnostic performed by ELQA team confirms that the circuit is open in the




54 QN-MP3-IST-RB.A45-B31R4-001 1061212 Cold RB.A45 MB2138 QH QPS 09-Feb-10 TE/MPE action OK InitiatedDuring IST test, QP S team found abnormal shape during the discharge of quench heaters power supply on magnet B31R4 (MBAL2138). ELQA performed a diagnostic on 08/02/2009 and found an abnormal resistance of 14,9 W instead of


39 QN-ELQA-TT893-RCD.A56B2-RCS.A56B1-0011204694 Cold RCD.A56B2RCS.A56B1 CRG 12-Mar-12 TE/MPE action OK InitiatedDuring X-mas break 2011-12, TE/CRG noticed that the warm temperature sensor (TT893) reading of current leads #42 and #43 of DFBAK.5L6 could be swapped.Further diagnostic is needed.


31 QN-ELQA-TP4E-IRC-RQ4.R6-001 1166773 Cold RQ4.R6 IRC 20-Oct-11 TE/MPE InitiatedDuring machine operation, following heavy beam losses, magnet RQ4.R6 quenched (03/10/2011) with firing of the quench heaters. At the same moment, the voltage tap EE11 of the current lead n°1 got open and remained in this state for


10 QN-ELQA-TP4D-ORC-MCBCHS5.L8B1-001831927 Cold MCBCHS5.L8B1 S4_606 ORC 28-Mar-07 Ongoing OK Under w ay Circuit MCBCHS5.L8B1 shows high resistance (around 22 mohm)on the cold side at 4.5 K.

53 QN-ELQA-DOC-C-RCBH31.R7B1.001 1017094 Cold RCBH31.R7B1 ICC 26-Aug-09TE/MSC-SCD

actionOK Initiated

The Hi current lead resistance (DFLDS.31R7.2) is too high (1.14e-3 Ohm). TE/MSC intervention required. Test repeated after TE/MSC-SCD intervention.

64 QN-ELQA-TP4E-HVQ-MBB.A78-002 1060444 Cold RB.A78 MB_1007 HVQ Coil 01-Feb-10 TE/MPE action OK I nitiatedAfter the 2010 nQP S refurbishment campaign, while qualifying the dipole line MBB (Lead#5) with nQP S cabling installed, a breakdown appeared at 1900V (01/02/2010).After disconnecting warm instrumentation (both P E), nQP S and "old QP S", the

66 QN-ELQA-TP4E-TT891-RQTL9.R7B1.0011160454 Cold RQTL9.R7B1 Cryo CL 29-Aug-11 TE/MPE action OK InitiatedThe TT891 cold temperature sensor read-out (Channel: DANB05_07R7_TT891A) was lost 8 times on current lead DFLBS.7R7.5 of circuit RQTL9.R7B1 on DFBAN.R7 since J une 2009.


39 QN-ELQA-TP4E-ICC-RCOSX3.L1-001 948545 Cold RCOSX3.L1 ICC 12-Aug-08 AT/MEI action OK InitiatedDuring ICC measurement, coil seems too be resistive (about 1.1 e-3 Ohm). In agreement with Sandor Feher, it was decided to keep the circuit as it is since there is nothing we can do. This magnet should be followed during the first steps of

46 QN-ELQA-TP4E-ICC-RCO.A81B2-001 955048 Cold RCO.A81B2 ICC 27-Aug-08 TE/MSC & MPE action

OK InitiatedCL1, CL2 and coil resistance too high (measured 05/06/08). Origin to be investigated. To be checked with cryo. NC initiated.Since this circuit is not needed for the 1st run of LHC at 5Tev, HCC decided to

List of pending ELQA NCs

• 15 NCs are “initiated” or “ Under way” status:

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No 1-2 EDMS Circuit Equipment Application Date Status EDMS Description Influence powering tests?

55 QN-ELQA-TP4E-HVQ-RCO.A12B2-001 1193222 RCO.A12B2 HVQ 21-Feb-12 Initiated

During the high voltage qualification of RCO.A12B2 circuit, the leakage current was too high (about 1mA).The problem comes most probably from the Lemo connector used to rout the Vtaps of the 120A current leads at the level of the cheminey.During the first qualification of the circuit RCO.A12B2 individually, the test passed successfully: 200V, leakage current < 10nA.Then, the test was repeated RCO.A12B1 shorted with RCO.A12B2 passing in the same cheminey. There was a breakdown at 600V. This breakdown is most probably due to the connector used to rout the cold Vtaps of the RCO.A12B1 and B2 and also in this particular case of 120A correctors of Q6L2.The individual test of RCO.A12B1 was repeated and is fine (200V, leakage current < 10nA).The individual test of RCO.A12B2 was repeated and showed too high leakage current (200V, leakage current about 1 mA).

MP 3 should state on the use of this circuit.

Yes: Les cables DC ont ete deconnectes et mis en court-circuit

au niveau du convertisseur. Ils

n'ont pas ete mis a la terre. Le potentiel du

circuit est donc flottant.

56 QN-ELQA-TP4E-HVQ-RCBCH6.L2B2-0011195151 RCBCH6.L2B2 HVQ 22-Feb-12 Initiated

Following the breakdown that occurred on the RCO.A12.B2 (see NC 1193222), it was decided to repeat the qualification of the circuit where the instrumentation is routed in the same connector.During this qualification, the RCBCH6.L2B2 had a leakage current too high (200V, leakage current about 1 mA). The RCBCV6.L2B1 is sound.

During the qualification of RCBCH6.L2B2, all the other circuits of the sub-sector were grounded (according to the procedure), including the RC0.A12.B2 circuit.Most probably there is a weakness of insulation of the voltage taps of the circuit RCBCH6.L2B2 versus voltage taps of RC0.A12.B2 routed in the same connector.The global insulation versus ground could be verified.

MP 3 should state on the use of this circuit.

No: related to RCO.A12B2, but no

pow ering limit

58 QN-ELQA-TP4E-ICC-RCOX3.L2-001 1203477 RCOX3.L2 ICC 6-Mar-12 Initiated

Following the X-mas beak 2011-12, this circuit has been found open. Diagnostic ongoing.The diagnostic performed by ELQA team confirms that the circuit is open in the cold part of the circuit: not accessible until LS1. The three circuits found opened belong to the same magnet assembly (nested magnet MCSOX).The DC cables of the circuit are disconnected from the power converter at the power converter side, and left floating.This circuit cannot be used and is condemned.

Yes: circuit found OPEN: The DC cables

of the circuit are disconnected from

the pow er converter at the pow er

converter side, and left f loating.

59 QN-ELQA-TP4E-ICC-RCOSX3.L2-001 1203478 RCOSX3.L2 ICC 6-Mar-12 Initiated






60 QN-ELQA-TP4E-ICC-RCSSX3.L2-003 1203479 RCSSX3.L2 ICC 6-Mar-12 Initiated






50 QN-ELQA-MIC-C-HVQ-LQXAA.1R1.001 1017174 LQXAA.1R1HCLQXA_001-FL000006HVQN 26-Aug-09 InitiatedOn DFBXB_3R1, quench heater YT1121 of magnet Q1 is showing a weak electrical insulation to ground (Breakdown at 1100 Volts). P lease refer to the attached excel document for a full diagnostic of all quench heaters of this inner triplet.

Yes: current limited in the present protection

scheme to 4 TeV equiv.

High Voltage withstand issue, solved with new ELQA procedure

HV issue between RCBCH6.L2B2 and RCO.A12.B2: condemned PC side

Related to RCO.A12.B2 here above, no powering limitation

Circuits found open in the cold part. Circuits are condemned!

Pending ELQA NCs affecting powering in S12

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No 2-3 EDMS Circuit Equipment Application Date Status EDMS Description Influence pow ering tests for 7 TeV?



54 QN-MP3-IST-RB.A45-B31R4-001 1061212 RB.A45 MB2138 QH 09-Feb-10 Initiated

During IST test, QP S team found abnormal shape during the discharge of quench heaters power supply on magnet B31R4 (MBAL2138). ELQA performed a diagnostic on 08/02/2009 and found an abnormal resistance of 14,9 W instead of nominal value of 11 W on quench heater YT111 . YT111 was also found shorted to ground via a 50 W resistance. All other quench heaters were checked (ohmic resistance and HVQ vs coil and ground) and are sound. The HVQ of the MBA line was also repeated successfully at 1900V to check that the electrical insulation of the faulty quench heater to coil was not deteriorated. This faulty quench heater will be replaced by 2 LF quench heaters according to the standard procedure for such cases. YT111 quench heater was disconnected at the level of the IFS box. NC can be closed with warnings.

Knud DAHLERUP -P ETERSEN on 2010-03-04, 09:39 said: Initiated comments The following actions were taken by QP S:1. After disconnection and securisation (by ELQA) of the wires to the faulty high-field heater in the IFS box, the QP S team re-configured, inside the Crawford box, the powering circuit no. 1. Two parallel-connected low-field heaters are now replacing the high-field heater. However, it was decided by MP 3 NOT to power these low-field heaters. QP S therefore disconnected the H.V. power cable from the DQHDS supply. This power supply remains in place, is constantly charged, but will not discharge during a discharge request. The trigger will arrive also to this unit but the thyristor opening will have no consequences. For security a plug has been inserted at the DQHDS output connector.

No, Magnet w ill be replaced during LS1


39 QN-ELQA-TT893-RCD.A56B2-RCS.A56B1-0011204694RCD.A56B2RCS.A56B1 12-Mar-12 Initiated

During X-mas break 2011-12, TE/CRG noticed that the warm temperature sensor (TT893) reading of current leads #42 and #43 of DFBAK.5L6 could be swapped.Further diagnostic is needed.TE/CRG (Nicolas Vauthier) notified ELQA team (Giorgio D'Angelo) that their diagnostic was performing by overcooling lead #42, and was actually TT893 (warm temperature sensor) of lead#43 that got colder. Similar operation was performed on the other side: overcooling lead #43, and was actually TT893 (warm temperature sensor) of lead#42 that got colder. The cold temperature sensor (TT891) behaved normally on both cases.On 12/03/2012, Elqa team performed a local diagnostic between the current leads themselves and the output of the P roximity Equipment (C50s connector feeding TE/CRG conditioner cards)Finally, the inversion between the two warm temperature sensors was confirmed to be inside the P roximity Equipment, most probably at the level of the straps routing the temperature sensors from the backplane of the module, to the C50 connectors.Correcting the error inside the module of the PE is a delicate intervention that would require a qualification of the three circuits (RCD.A56B2, RCS.A56B1 and RCS.A56B2) affected by this module. Since the LHC machine would restart soon, ELQA team decided to correct the temperature sensor assignment at the input of the P E, swapping the connectors C81-1-U and C83-1-L.This NC should remain “Initiated” for traceability purpose until LS1, when the cabling will be restored to the planed state.

No: temporary solution is fine. Final correction of cabling

to be done during LS1


31 QN-ELQA-TP4E-IRC-RQ4.R6-001 1166773 RQ4.R6 IRC 20-Oct-11 Initiated

During machine operation, following heavy beam losses, magnet RQ4.R6 quenched (03/10/2011) with firing of the quench heaters. At the same moment, the voltage tap EE11 of the current lead n°1 got open and remained in this state for several hours. It came back after disconnection and reconnection of the 16 pins Fischer connector on top of the current lead during the diagnostic tests. There is then 2 possibilities either a bad contact inside the current lead or a bad contact inside the so called "Cable Segment" CS cable routing the current leads voltage taps to the "P roximity Equipment" P E crate. During next TS °5 (07/11 to 11/11/2011) ELQA will make some further investigation and measure precisely the contact resistances of all voltage taps to better understand what happened. For additional safety, we shall replace the CS cable to exclude this possibility in case the problem reoccurs.

No

H.F. QH issue, magnet will be replaced during LS1.

Warm temp sensor of C.L. is swapped. Temporarily corrected.

Final correction during LS1.

Vtap of C.L. lost on Nov.2011. Cable segment replaced as precaution.

Pending ELQA NCs affecting powering in S2-3; 3-4; 4-5, 5-6: 6-7

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No 7-8 EDMS Circuit Equipment Application Date Status EDMS Description Inf luence pow ering tests for 7 TeV?

10 QN-ELQA-TP4D-ORC-MCBCHS5.L8B1-001831927 MCBCHS5.L8B1 S4_606 ORC 28-Mar-07 Under w ay Circuit MCBCHS5.L8B1 shows high resistance (around 22 mohm)on the cold side at 4.5 K.

Yes: circuit condemned, replace

by w arm magnet. Q5L8 w ill be

exchanged during LS1

53 QN-ELQA-DOC-C-RCBH31.R7B1.001 1017094 RCBH31.R7B1 ICC 26-Aug-09 Initiated

The Hi current lead resistance (DFLDS.31R7.2) is too high (1.14e-3 Ohm). TE/MSC intervention required. Test repeated after TE/MSC-SCD intervention.The current leads resistance are now OK, but coil seems to be too resistive (about 1 mOhm).Further diagnostic is required by ELQA team.Additional measurements confirm that the coil (below cold Vtap of current leads) has a resistance of 1.1 mOhm (see file attached to NC).The resistance seems to be stable with current and time.Up to MP 3 to state whether to power this circuit or not.After intervention of TE/MSC, the current lead resistance is correct. However the cold part is showing a 1mohms resistance. This measurement was repeated 3 times giving the same result. Note that it is not because of the cooling as the neighboring magnet is sound. This magnet is NOT released for powering.This circuit is condemned at the power converter side.

Yes: cold part of circuit too resistive.

This circuit is condemned at the pow er converter

side.

64 QN-ELQA-TP4E-HVQ-MBB.A78-002 1060444 RB.A78 MB_1007 HVQ 01-Feb-10 I nitiated

After the 2010 nQP S refurbishment campaign, while qualifying the dipole line MBB (Lead#5) with nQP S cabling installed, a breakdown appeared at 1900V (01/02/2010).After disconnecting warm instrumentation (both P E), nQP S and "old QP S", the default was still present at about 1.7 to 1.9kV.ELQA Team performed diagnostic (02/02/2010), and localized the defect at the level of magnet B30R7 (MBBR 1007).In order to ensure the instrumentation integrity, M IC/C test was successfully performed on this magnet. Then in order to exclude a weakness in the warm part of magnet instrumentation, the IFS box was unsoldered and removed (03/02/2010). During this removal, two "pastilles" (nb 33;EE111 and nb 36;EE931) of the IFS board were detached.The HV test was repeated and failed at about 1.7kV (fault confirmed in the cold part).The same IFS box was remounted (because of the detached pastilles, a wire replaced the P CB track between feedthrough #33 and EE111). The M IC/C test was successfully repeated afterwards.According to TE/MP E decision, the voltage of the qualification for this line is lowered to 1600V (enough for 3.3TeV run).Then, the HV qualification of RB line MBB (Lead #5), with "old QP S" and nQP S connected was successfully completed by ELQA team at 1600V (04/02/2010).Nevertheless, this is considered as a temporary intermediate step to the nominal qualification at 1900V. Therefore this NC will remain initiated until this magnet is repaired or replaced, and the nominal qualification is completed.


66 QN-ELQA-TP4E-TT891-RQTL9.R7B1.0011160454 RQTL9.R7B1 Cryo 29-Aug-11 Initiated

The TT891 cold temperature sensor read-out (Channel: DANB05_07R7_TT891A) was lost 8 times on current lead DFLBS.7R7.5 of circuit RQTL9.R7B1 on DFBAN.R7 since J une 2009. The problem is due to a bad contact in the measuring chain but is difficult to localise as the read-out sometimes remain stable for weeks or months before re-occurring and also because we didn’t succeed in reproducing the error during any of our interventions!After changing the cryogenic electronics, swapping the cryogenic cable between the P E and the cryogenic rack standing in RR77, we know that the problem is due either to the sensor itself or the cable segment routing the sensor to the P E or the ribbon inside the P E (link between the P CB and the C50 connector). On 29/08/2011, we decided to switch to the spare temperature sensor. This NC should remain open for at least a year to see if the problem is solved.

No, temperature reading is reliable since September

2011

120A corrector of Q5L8 replaced by warm magnet. Initial corrector condemned. Q5L8 will be replaced during LS1

60A corrector of Q31.R7 too resistive in the cold part. Circuit is not mandatory, and condemned.

Magnet B30R7 (MBBR1007) has HV vs GND issue (1.6kV instead of 1.9kV).

Satisfactory for 4TeV equivalent current. Magnet will be replaced during LS1

Spurious lost of cold temperature reading. Stable since September 2011.

Pending ELQA NCs affecting powering in S78

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No 8-1 EDMS Circuit Equipment Application Date Status EDMS Description Inf luence pow ering tests for 7 TeV?

39 QN-ELQA-TP4E-ICC-RCOSX3.L1-001 948545 RCOSX3.L1 ICC 12-Aug-08 Initiated

During ICC measurement, coil seems too be resistive (about 1.1 e-3 Ohm). In agreement with Sandor Feher, it was decided to keep the circuit as it is since there is nothing we can do. This magnet should be followed during the first steps of powering. This NC should be closed once the powering step is successfully achieved.

YES, the circuit is open below the cold vtaps of the 120 A current leads. This

circuit is isolated from ground and from the

other circuits.

46 QN-ELQA-TP4E-ICC-RCO.A81B2-001 955048 RCO.A81B2 ICC 27-Aug-08 Initiated

CL1, CL2 and coil resistance too high (measured 05/06/08). Origin to be investigated. To be checked with cryo. NC initiated.Since this circuit is not needed for the 1st run of LHC at 5Tev, HCC decided to postpone investigation due to time constrain.Diagnostics performed on 26th of March 2009, shows that this circuit is open between position B12L1 and B11L1.This circuit cannot be used until it is repaired (need to warm up the sector and open the interconnections).

YES, diagnostics performed on 26th of March 2009, show s

that this circuit is open betw een

position B12L1 and B11L1.

This circuit cannot be used until it is

repaired (need to w arm up the sector

and open the interconnections).

120A corrector of IT.L1: Circuit found open in the cold part. Circuit is condemned!

RCO.A81.B2 is open in the cold part. Diagnostic performed on March 2009 shows that this circuit is open between position B12L1 and B11L1. The circuit is condemned and will be repaired during

LS1

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No 1-2 EDMS HWC phase Circuit Date Status EDMS DescriptionInfluence

powering tests?

1 QN-MPP-I ST-RB.A12-C15R1-001 947913 Cold RB.A12 8-Aug-08 Closed with warnings

The I ST test performed by the QPS team failed during the discharge of the quench heater YT111 of the magnet 2395 at C.15R1. The QH circuit has been found open below the



The I ST test performed by the QPS team failed during the discharge of the quench heater YT111 of the magnet 1372 at C.32R1. The QH circuit has been found open below the


No 2-3 EDMS HWC phase Circuit Date Status EDMS Description

1 QN-MPP-I ST-RB.A23-A21L3-001 942550 Cold RB.A23 10-J ul-08 Closed with warnings

During I ST test, QPS team found abnormal shape during the discharge of quench heaters power supply on magnet A21L3 (MBAL3708). QH YT121 was found broken.


No 3-4 EDMS HWC phase Circuit Date Status EDMS



During I ST test, QPS team found abnormal shape during the discharge of quench heaters power supply on magnet C17R4 (MBBL2214). QH YT211 resistance is high (14.5Ohm




1 QN-MPP-I ST-RB.A78-B21L8-001 925045 Cold RB.A78 7-May-08 Closed with warnings

During I ST test, QPS team found abnormal shape during the discharge of quench heaters power supply on magnet B21L8 (MBBR2007).


3 Low Cold Performance RCO.A78B2_PCS1029807 Cold/ PCS RCO.A78.B2 1-Oct-09 InitiatedPCS test failed at 55A during 2008 hardware commissioning campaign10th of J une 2008, PCS test failed at 55A (2 quenches) ;Same on 18th of August 2008

Yes, splice investigation to be

performed.

No 8-1 EDMS HWC phase Circuit Date Status EDMS Description Description

Quench Heaters issues, already mentioned above. Those magnets will be replaced during LS1

RCO.A78B2: Low quench performance: The circuit "quenched" always (three times) while ramping up the current starting from 55 A (so not on flat top as in some comments). It

may be in a magnet or in the busbar. Splice issue?? To be diagnosed.

Other NCs reported by MP3 with ELQA actions:

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Summary of NCs limiting powering before LS1Circuit Magnet Problem Input EDMS Sector To be

changedRemarks Limitation?

RQX.R1 LQXAA.1R1 QH insulation to GND ELQA 1017174 12 No

Magnet protection revised for 7TeV, new

parameters !NO

RCO.A12B2 H.V. insulation vs RCBCH6.L2B2 ELQA 1193222 12 No Consolidation during

LS1 YES

RCBCH6.L2B2 H.V. insulation vs RCO.A12B2 ELQA 1195151 12 No Consolidation during

LS1 NO

RCOX3.L2 RCOX3.L2 Open circuit in cold part ELQA 1203477 12 No Needed for 7TeV? YES

RCOSX3.L2 RCOSX3.L2 Open circuit in cold part ELQA 1203478 12 No Needed for 7TeV? YES

RCSSX3.L2 RCSSX3.L2 Open circuit in cold part ELQA 1203479 12 No Needed for 7TeV? YES

RCBCH5.L8B1 RCBCH5.L8B1 Current lead too resistive ELQA 831927 78 Yes New Q5L8 YES

RCBH31.R7B1 RCBH31.R7B1 Cold part too resistive ELQA 1017094 78 Yes Circuit condemned,

Not needed for 7TeV YES

RCO.A78B2 RCO.A78B2 Cold part too resistive MP3 1029807 78 Yes TO BE INVESTIGATED TO BE INVESTIGATED

RCOSX3.L1 RCOSX3.L1 Open circuit in cold part ELQA 948545 81 No Needed for 7TeV? YES

RCO.A81B2 MB.B12L1Open circuit in

cold part, between B12L1

and B11L1ELQA 955048 81 No Consolidation during

LS1 YES

List of pending ELQA NCs

https://edms.cern.ch/document/1017174/1











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NCs treatment resources…

• ELQA NCs - resources?o Manpower: ELQA CERN Staff + Help from HNINP collaborator

• ELQA NCs - When?o During powering test phase, before “Standard ELQA campaign”:

February 11th to 27th 2013

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Thank you!

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MPE Workshop for LS1 / 22 23 Nov. 2012, G. DAngelo TE/MPE-EE ELQA during LS1 train, Special...

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