1. GEM Integrated PCB readout and cooling
Andrey Marinov
On behalf of GEMs for CMS collaboration
CMS GEM Upgrade Workshop III
18/04/2012

2. Talk Outline GE1/1 Proto1 GE1/1 Proto2
GE CMS detector – Cooling and integrated readout PCB
NS2 Technique
Detector Powering plan
Cooling Calculations
Readout strips - PCB design
On going activities
CMS GEM Upgrade Workshop III
18/04/2012

3. GE1/1 Detector Layout GE1/1 Proto1 GE1/1 Proto2 Drift, GEM1 = 3mm
GEM1, GEM2 = 2mm
GEM1, GEM2 = 1mm
GEM2, GEM3 = 2mm
GEM3, Readout = 2mm
GEM3, Readout = 1mm
CMS GEM Upgrade Workshop III
18/04/2012

4. GE1/1 Prototypes – Proto1 Readout PCB with strips
128 channels per VFAT connector
0.8mm pitch
256 strips for each eta partition
1.6mm pitch
PCB thickness = 3mm
1024 channels
CMS GEM Upgrade Workshop III
18/04/2012

5. GE1/1 Proto2 – Readout Board
24VFAT FEBs
3072 channels
Strip’s pitch 0.8mm
Strip’s pitch 0.4mm
CMS GEM Upgrade Workshop III
18/04/2012

6. From Thermo Stretching to NS2 Technology
CMS GEM Upgrade Workshop III
18/04/2012

7. GE CMS Prototype Full size detector ready for installation in CMS
3840 Readout channels.
Based on NS2 Technology.
Gaps between the detector electrodes 3/1/2/1mm
All services integrated and compatible with the CMS infrastructure.
Thanks to NS2 method the detector can be open and elements can be changed.
CMS GEM Upgrade Workshop III
18/04/2012

8. GE CMS Prototype - Power Consumption
VFAT FEB power =18W
HV Divider = 4W
dc/dc converters - 80% efficiency
GBT = 2.25W
Total Power for the detector is 34W
CMS GEM Upgrade Workshop III
18/04/2012

9. GE Detector Cooling Sketch
CMS GEM Upgrade Workshop III
18/04/2012

10. Clearance Available Inside the GE detector
9mm clearance
CMS GEM Upgrade Workshop III
18/04/2012

11. VFAT Cooling Sketch
CMS GEM Upgrade Workshop III
18/04/2012

12. VFAT3 PCB Design 44mm 50 mm Multilayer chip bonding
CMS GEM Upgrade Workshop III
18/04/2012

13. VFAT Cooling Sketch Water flow rate = 0.02826 kg/s
CMS GEM Upgrade Workshop III
18/04/2012

14. VFAT Chip Cooling Calculations made by Enrich Da Riva – CERN CFD team
CMS GEM Upgrade Workshop III
18/04/2012

15. Cooling Calculations for the HV Divider
Calculations made by Enrico Da Riva – CERN CFD team
CMS GEM Upgrade Workshop III
18/04/2012

16. GE Detector – Cooling of the HV divider
CMS GEM Upgrade Workshop III
18/04/2012

17. VFAT3 Cooling Calculations made by Enrico Da Riva – CERN CFD team
CMS GEM Upgrade Workshop III
18/04/2012

18. GE Integrated Readout Board
For the moment the full size readout board is foreseen to be 7 layers providing :
Strips and connection to the FEB
Power to the FEBs
Ground connection
LVDS signal lines from FEB to the optical transceiver GBT
CMS GEM Upgrade Workshop III
18/04/2012

19. On going activities VFAT PCB design – nearly finished
GE readout board on going
CMS GEM Upgrade Workshop III
18/04/2012

20. Thank you.
CMS GEM Upgrade Workshop III
18/04/2012