GEM Integrated PCB readout and cooling
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Transcript of GEM Integrated PCB readout and cooling
CMS GEM Upgrade Workshop III1
GEM Integrated PCB readout and cooling
Andrey MarinovOn behalf of GEMs for CMS collaboration
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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
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GE1/1 Detector Layout
GE1/1 Proto1
GE1/1 Proto2
Drift, GEM1 = 3mm
Drift, GEM1 = 3mm
GEM1, GEM2 = 2mm
GEM1, GEM2 = 1mm
GEM2, GEM3 = 2mm
GEM2, GEM3 = 2mm
GEM3, Readout = 2mm
GEM3, Readout = 1mm
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GE1/1 Prototypes – Proto1Readout PCB with strips
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0.8mm pitch1.6mm pitch256 strips for each eta partition
128 channels per VFAT connector
PCB thickness = 3mm1024 channels
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GE1/1 Proto2 – Readout Board
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Strip’s pitch 0.8mm Strip’s pitch 0.4mm24VFAT FEBs3072 channels
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From Thermo Stretching to NS2 Technology
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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.
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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
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GE Detector Cooling Sketch
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Clearance Available Inside the GE detector
9mm clearance
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VFAT Cooling Sketch
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VFAT3 PCB Design
50mm
44mm
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Multilayer chip bonding
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VFAT Cooling Sketch
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Water flow rate = 0.02826 kg/s
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VFAT Chip Cooling
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Calculations made by Enrich Da Riva – CERN CFD team
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Cooling Calculations for the HV Divider
Calculations made by Enrico Da Riva – CERN CFD team 18/04/2012
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GE Detector – Cooling of the HV divider
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VFAT3 Cooling
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Calculations made by Enrico Da Riva – CERN CFD team
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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
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On going activities VFAT PCB design – nearly finished GE readout board on going
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Thank you.
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