1. Pixel Heaters Refurbishment 22.01.2014 A.Bitadze

2. Work done: Core resistance measurements (for the heating element). Isolation resistance measurements. Measurement are done every month to monitor changes Inspection of the control, interlock and C31/C32/C33 temperature sensors and connectors. Relabeling temperature sensor cables and connectors. Checking existing spare heaters. Created existing spare heater inventory (Twiki page). Ordered 16 Spare heaters from THERMOCOAX. Created EDMS folder for documentation. 2/14

3. Work done: Core resistance measurements. Design Resistance: Barrel/Opto 20.23 Ω Discs 38.01 Ω 3/14

4. Work done: Core resistance measurements. Design Resistance: Barrel/Opto 20.23 Ω Discs 38.01 Ω 4/14

5. Work done: Core resistance measurements. 5/14

6. Work done: Isolation resistance measurements.  Measured isolation resistance for the Heater on Loop 084 was 450 MΩ. Measurements in 09.07.2013 were showing O.L. in GΩ range. Measurements in 29.08.2013 were showing 450 MΩ. Measurements in 27.09.2013 were showing O.L. in GΩ range. Measurements in 27.10.2013 are showing O.L. in GΩ range. All other heaters show O.L. for the isolation resistance in GΩ range  Measured isolation resistance for the Heater on Loop 005 is 0.11 MΩ. Measurements in 09.07.2013 were showing O.L. in GΩ range. Measurements in 29.08.2013 were showing O.L. in GΩ range. Measurements in 27.09.2013 were showing 0.11 MΩ. Measurements in 27.10.2013 are showing 0.11 MΩ. 6/14

7. Work done: Inspection of the control, interlock and C31/C32/C33 temperature sensors and connectors. Envelope # 1 Q1AProblem with TC_AProblem with TC_BProblem with C2Problem with C31Problem with C32Problem with C33Action 3 No Bad connector Change connector for C3, repeat test 5 6 17 Envelope # 2 Q1CProblem with TC_AProblem with TC_BProblem with C2Problem with C31Problem with C32Problem with C33Action 19 No Resolder or exchange TC#2A, then test 21 8 9 11 14 2 29.5 C non stable Envelope # 3 Q1AProblem with TC_AProblem with TC_BProblem with C2Problem with C31Problem with C32Problem with C33Action 18 No Nothing 16 4 7 1 Envelope # 4 Q1CProblem with TC_AProblem with TC_BProblem with C2Problem with C31Problem with C32Problem with C33Action 20 No Nothing 10 12 13 15 Damaged sensor/connector inventory: Damaged:5 Thermocouples 19 NTC 1 Connector (for C33 sensors) 7/14

8. Work done: Relabeling temperature sensor cables / connectors. 8/14

9. Work done: Checking existing spare heaters. Created existing spare heater inventory (Twiki page). DetectorTypeN of SparesN of low I.R. PixelBarrel91 PixelDisk40 SCTBarrel30 SCTEndCap82 DetectorType & Series NBatch NResistanceCommentImagesCustom made Coil connector Power connector (Lemo) Thermocaple and cable connector Inlet Connector CoreIsolation (at 250V) PixelATLICSC_0006/0137.2OLSerto is missing. No heatshrink on CC 16INNp PixelATLICSC 0006-04/11-OLIn SR1 Gppp PixelATLICSC_0006/0919.6OLSerto is missing.1313, 14, 151415INNp PixelATLICSC_0006-01/0719.8OLLemo damaged. No thermocoupls. 11, 2, 323GDNp PixelATLICSC_0006-02/2219.9OLwriten on pipe: "shorted" 44, 55DDDp PixelATLICSC_0006/1018.6OLIn SR1 connected to test stand writen on pipe: "short" 6,7,8,96,7,8,9Gppp PixelATLICSC_0006/0237.5OLSerto missing. No heatshrink on CC 1010,11,121112IGNp PixelATLICSC_0006-02/3019.3OL (11MΩ at 500V) writen on pipe: "heater shorted" 1717,1818DDDp https://twiki.cern.ch/twiki/bin/viewauth/Atlas/HeaterSpares 9/14

10. Work done: Ordered 16 Spare heaters from THERMOCOAX. 16 Assemblies 56 000 CHF 10/14

11. Work done: Created EDMS folder for documentation. ID Evaporative Cooling System Heater Refurbishment 2013 EDMS Id: 1325444 https://edms.cern.ch/document/1325444/1 and sub-documents for: PIXEL Heaters EDMS Id: 1325445 https://edms.cern.ch/document/1325445/1 SCT Heaters EDMS Id: 1325446 https://edms.cern.ch/document/1325446/1 Spare Heaters EDMS Id: 1325449 https://edms.cern.ch/document/1325449/1 Presentations / Meeting minutes EDMS Id: 1325448 https://edms.cern.ch/document/1325448/1 This EDMS folder contains all documents (Drawings, Measurement Data, Plots, Presentations, Meeting minutes…) related to the heater refurbishment activities. 11/14

12. On-going activities and plans:  Fixing Broken Sensors (5 TC, 19 NTC, 1 Connector).  Solder Lemo Connectors on control sensor cables (2x88 in SR1 + 2x88 in pit = total 352).  Attach TC sensors instead of C33 NTC sensors (33 sensors). Solder Lemo Connectors on these control sensor cables.  Endescope inspection for 20% of heaters.  Pressure Test at 7bar abs. Parts are ready: Manifold, Pressure Sensors, Readout box, PC, Labview program.  Leak Test. 12/14

13. Timetable : 13/14 PIXEL installation flow-chart JanFebMarchAprilMayJune 2014 Week123456789################## PP2, Opto system commissioned pixel cabling C side pixel cabling A side C3F8 distribution rack final & tight heater connectors X X√ heater installation/ connection C side heater installation/ connection A side Pixel conncection to heater leak check C A Dry wrapping of exhausts/Nose area Pixel trial operation SCT trial operation IBL installation IBL connection IDEP close

14. THANK YOU FOR YOUR ATTANTION 14/14