GE1/1 Services and Strips PCB Andrey Marinov On behalf of CMS GEMs collaboration.
CONSTRUCTION AND TEST CMS NS2 GEMs (GE1/1)
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Transcript of CONSTRUCTION AND TEST CMS NS2 GEMs (GE1/1)
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CONSTRUCTION AND TESTCMS NS2 GEMs (GE1/1)
Yi Zhou, Christopher Armaingnaud, Jeremie Merlin, Stefano Colafranceschi, Lieselotte Moreels, Emmanuel Rohee, Hugo Buhours,
Dylan Furic, Andrey Marinov, Leszek Ropelewski, Eraldo Oliveri,Rui De Oliveira, Archana Sharma
forGEMs for CMS Collaboration
& RD51
RD51 Collaboration Meeting Stony Brook Oct 2012
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Introduction: the CMS GEM Endcap system
GEM Detectors
2
GE1/1GE2/1
Superchambers
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GE1/1 Detector Layout
GE1/1 Proto1 GE1/1 Proto2Drift, 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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III GEM WORKSHOP 418/04/2012
MASS : 9,2 Kg
Recent 20mm elongationIn this direction (HV Div.)
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III GEM WORKSHOP 518/04/2012
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GE1/1 Prototypes – Proto1Readout PCB with strips
0.8mm pitch1.6mm pitch256 strips for each eta partition
128 channels per VFAT connector
PCB thickness = 3mm1024 channels
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Pins SpringsCanons Filetes
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4 detectors completed
• No spacers in active area• Assembly time : 2 hours• No gluing, no soldering• Re-opening possible• GEM exchange possible• No stretch degradation with
time• Stretching more intense
NS2 Technique
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Power supply
Ceramic divider distributing the High Voltage among the 3 GEMs
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Gain calibration CMS – GE1/1 – NS2 prototype
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Gain calibration
• For each sector (24 readout sectors) :– Counts VS chamber HV supply– Output current– Position of the X-ray peak
• We want to see if : The gain is uniform for all the readout sectorsAll the sectors are workingThe GEM stretching system is suitable
Gain VS chamber HV supply
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Gain calibration Experimental Setup
Copper X – ray (8KeV)
Electronic modules
• Gas mixture Ar - CO2 (70%/30%)• Gas flow : 5L/hour
Holes
Prototype 1
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Gain calibration
29503000
30503100
31503200
32503300
33503400
34503500
35503600
10
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10000
Gain VS high voltage applied
sector1-4sector1-5sector1-8sector2-5sector2-6sector3-4sector3-5sector3-6sector3-8sector1-1sector1-2sector1-3
H.V.
Gain
Chamber 1
gain1-1
gain1-3
gain1-5
gain1-7
gain2-1
gain2-3
gain2-5
gain2-7
gain3-1
gain3-3
gain3-5
gain3-7
0100020003000400050006000700080009000
10000
Gain (3600V)
Gain (3600V)
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Gain calibration
1 2 3 4 5 6 7
0
2000
4000
6000
8000
10000
12000
14000
raw 1raw 2
raw 3
Gain VS sector position
raw 1raw 2raw 3
Gain
Chamber 1