1. Coordination of Hardware Commissioning
Sector 78
Cryogenics
Electrical Quality Assurance
Warm magnet tests
Last cabling campaign
Final installation, repair, maintenance actions
Test of software for the powering procedures
Sector 81
Injection system tests
RR57 – Sector 56
finished
UA67 – Sector 67
Progressing as planned
24h run programmed for February 5th
RR73 – Sector 67
in preparation
Short Circuit Tests
Point 8
Cool down of sectors 45 & 81
Powering Tests in Sector 78
Preparation

2. Warm magnet tests around Point 8
Injection Line & Septa
RBIAH.87833
RCIBV.87904
RCIBV.88104
RCIBV.88115
RCIBV.88117
RCIBH.88004
RQID.87900
RQID.88100
RQIF.87800
RQIF.88000
MSIB8813M
RBXWSH.L8
RBXWSH.R8
RBXWH.L8
Magnet Interlock Test
Electrical QA
PC Interlock Test
PC Individual System Tests
8-h Run (includes Polarity + Thermomeasures)
24h Run
LHCb compensators
next week

3. Kicker system conditioning
The automatic conditioning system required two weeks to become robust enough to operate unattended during the nights (Interlocks from magnets and from vacuum)
It now operates day and nights and stops once per day. It is restarted by an operator during working hours.
The conditioning started at 20kV and should reach 57kV (nominal+5,5%). Today we have reached 43kV: we are very satisfied even if the most difficult part (43->57kV) remains to be done !
Unfortunately the conditioning must be interrupted next week to allow cabling activities in the area.
Courtesy L.Ducimetière

4. Coordination of Hardware Commissioning
Experience from Sector 78
Assembly
Leak test
Cool down
Pressure Test
Preparation
for c-down
Powering
Electrical Quality Assurance
« … corriger ce qui n’a pas été réalisé correctement. »

5. Coordination of Hardware Commissioning
Experience from Sector 78
@8h30

6. Coordination of Hardware Commissioning

7. Cabling non-conformities
…what slowed us down
Cabling non-conformities
Malfaçons
Damage during installation
Positioning of DC cables connections on the DFBs
Preparation of the Current Leads
Insulation vacuum
Heating system
Cameras
Galvanic insulation
Cryo instrumentation
Control of valves
In-rush current limitation to instrumentation crates
Cryo controls
4 mm2
1.5 mm2
2.5 mm2
crimped
Crates under the dipoles in the tunnel
Burndy
Harting
Europrises
Assembly
Leak test
Cool down
Pressure Test
Preparation
for c-down
Powering
Electrical Quality Assurance

8. Cabling non-conformities
…what slowed us down
Cabling non-conformities
Malfaçons
Damage during installation
Positioning of DC cables connections on the DFBs
Preparation of the Current Leads
Insulation vacuum
Heating system
Cameras
Galvanic insulation
Cryo instrumentation
Control of valves
In-rush current limitation to instrumentation crates
Cryo controls
Assembly
Leak test
Cool down
Pressure Test
Preparation
for c-down
Powering
Electrical Quality Assurance

9. Cabling non-conformities
…what slowed us down
Cabling non-conformities
Malfaçons
Damage during installation
Positioning of DC cables connections on the DFBs
Preparation of the Current Leads
Insulation vacuum
Heating system
Cameras
Galvanic insulation
Cryo instrumentation
Control of valves
In-rush current limitation to instrumentation crates
Cryo controls
Assembly
Leak test
Cool down
Pressure Test
Preparation
for c-down
Powering
Electrical Quality Assurance

10. … with a little bit of help from our friends
Cabling non-conformities
Malfaçons
Damage during installation
Positioning of DC cables connections on the DFBs
Preparation of the Current Leads
Insulation vacuum
Heating system
Cameras
Galvanic insulation
Cryo instrumentation
Control of valves
In-rush current limitation to instrumentation crates
Cryo controls
Assembly
Leak test
Cool down
Pressure Test
Preparation
for c-down
Powering
Electrical Quality Assurance

11. Cabling non-conformities
…what kept us busy
Cabling non-conformities
Malfaçons (AC, DC, instrumentation)
Damage during installation
Positioning of DC cables connections on the DFBs
Preparation of the Current Leads
Insulation vacuum
Heating system
Cameras
Galvanic insulation
Cryo instrumentation
Control of valves
In-rush current limitation to instrumentation crates
Cryo controls
Assembly
Leak test
Cool down
Pressure Test
Preparation
for c-down
Powering
Electrical Quality Assurance

12. …what could be improved
Cabling non-conformities
Malfaçons
Damage during installation
Positioning of DC cables connections on the DFBs
Preparation of the Current Leads
Insulation vacuum
Heating system
Cameras
Galvanic insulation
Cryo instrumentation
Control of valves
In-rush current limitation to instrumentation crates
Cryo controls
Assembly
Leak test
Cool down
Pressure Test
Preparation
for c-down
Powering
Electrical Quality Assurance

13. LHC sector 7-8 Cool-down status end Jan’07
S. Claudet, on behalf of the
LHC Cryogenics OP team
and
« Cryogenic Performance Panel »
Assembly
Leak test
Cool down
Pressure Test
Preparation
for c-down
Powering
Electrical Quality Assurance

14. Concerned sub-systems
Upper
Cold Box
Warm
Compressor
Station
Lower
Magnet Cryostats, DFB, ACS
Cold
box
Shaft
Surface
Cavern
Tunnel
LHC Sector (3.3 km)
1.8 K
Refrigeration
Unit
New
4.5 K
Refrigerator
Existing
Point 8
Point 1.8
Point 7
MP Storage
Interconnection Box
Distribution Line

15. Tuning - cryo commissioning
Cool-down milestones
Wk. 2
Wk. 3
Wk. 4
Wk. 5
Jan
2007
Flushing
Tunnel equip.
ELQA/control
Cooldown
300 – 80 K
Cooldown
300 – 80 K
EL -control
Cooldown
80 – 4.5 K
EL -control
Close to 3 weeks envisaged the 1st time (absolute mini: 10 days)
80K tests early february: ELQA, new PLC upload, test of quench line to P7
Feb
2007
Wk. 11
Wk. 7
Wk. 8
Wk. 9
Wk. 10
Tuning - cryo commissioning
4.5 – 1.9 K
Preparation for
Powering
1.9 K
Ready
For
powering
Wk. 6
Filling and
Cooldown
Mar
Wk. 12
Wk. 13
Cooldown
80 – 4.5 K
Mini: 2 d
Mini: 1 d

16. QRL flushing - Dec’06
Mostly:
- Kapton (Vent after P Test)
- Dust

17. Flushing machine Wk 2 Jan’07
Before
After
Kapton bits
Metal strips
≈ 50 h
+ 8 L of Water

18. Average capacity: (up to Jan 31st) Total: 43 % -wk-ends: 52 %
- stops %
a) Start cooldown tunnel without magnet f) Unscheduled electrical stop & tunnel intervention
cheduled electrical stop & tunnel intervention g) Reduced cooling capacity for magnet checking
c) Control system stop for updates h) Reduced capacity
d) Cooling adjustments in shields and magnets
e) Snow on roads for liquid nitrogen trucks

19. Summary 1st week (wk. 3 Jan’07)
Restricted access, PLC update
Progressive ramp-up of cooling capacity
Check of configuration
Manual control of the arc
Unbalanced cool-down of cells
Possible cooling of DFB’s
Cryoplant PLC « on hold »

20. Summary 2nd week (wk. 4 Jan’07)
Stop to reset PLC
Minimised effect of snow on roads
400 kV failure
ELQA (21L8)
Increased capacity
Manual re-balancing of cool-down

21. Summary 3rd week (wk. 5 Jan’07)
Cont’ increased capacity
Supply temperature decreased to 80 K
AUG P8 surface (Random, Cryo?)
What’s next ?!?

22. n Snow on roads for liquid nitrogen trucks
j Start cooldown tunnel without magnet o Unscheduled electrical stop & tunnel intervention
k Scheduled electrical stop & tunnel intervention  Reduced cooling capacity for magnet checking
Control system stop for updates  Reduced cooling along week-end with only on-call activity
m Cooling adjustments in shields and magnets  Random Emergency Stop in cryogenic surface building
n Snow on roads for liquid nitrogen trucks

23. Electrical Quality Assurance
Findings During The Hardware Commissioning Phase in Sector 7-8
D. Bozzini on behalf of the ELQA team
AT/MEL-EM
2 February 2007
Assembly
Leak test
Cool down
Pressure Test
Preparation
for c-down
Powering
Electrical Quality Assurance

24. MQF.A78 circuit: A successful test

25. MB.A78 circuit: Short to ground
 NC

26. MB.A78 Diagnostic: Precise location (1/10 meter)
Local injection (between QQBI.20R7 and QBBI.A21R7 of a current 6 A through the I_Taps of the diodes
V2 = VEE213 - Vf ≈ mV V3 = VEE111 - Vf ≈ mV V1 = VEE111 - VEE ≈ mV
The developed length of bus-bar between the V-taps EE111 and EE213 has been computed based on specification drawings and is about mm
V1 gives the voltage drop per unit of bus-bar length: mV/mm NTP)
The distance of the fault Lf from v-tap EE213 is about 1300 mm (+/- 200mm)

27. MB.A78 Diagnostic: Confirmation by endoscopy
On the left side of the interconnection QBBI.A21R7, at around 1.3 m there is a dipole magnet and the bus bar lyra.
Fault localization
Fault localization based on less-accurate measurements (low current, diode connections)
Courtesy F. Savary AT/MCS
Assembly
Leak test
Cool down
Pressure Test
Preparation
for c-down
Powering
Electrical Quality Assurance

28. Overview: Online monitoring during cool down

29. MQD.A78: History of events

30. MQD local diagnostic 15.38 m (38.98-7.14) x 0.289 = 9.21 mV
Accuracy: +/- 10 m

31. 8h30 meeting … in summary Remember, it was the first one !
We had a terrific response from the teams involved in the activity to straighten things up
Team building exercise
Cryo Operation
Electrical Quality Assurance
Current Leads
Magnet builders & interconnects
Cabling (DC & Controls, AC)
Safety systems
Cooling & Ventilation
Controls
Interlocks
Power Converters
Safety inspectors
Planning
Coordination in the field
Confidence for the difficult year ahead of us
8h30 meeting