alice forward detectors technical design report
DESCRIPTION
ALICE Forward Detectors Technical Design Report. Editorial team: I.G. Bearden (NBI) H. Bøggild (NBI) C.Holm (NBI) J.J. Gaardhøje (NBI), ch J.Y. Grossiord (Lyon) T. Malkiewicz (Jyvaesk.) B.S. Nielsen (NBI) G. Paic (Mexico) W. Trzaska (Jyvaeskyla). FMD ’inner’ protype before dicing. - PowerPoint PPT PresentationTRANSCRIPT
8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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ALICE Forward DetectorsTechnical Design Report
Editorial team:I.G. Bearden (NBI)
H. Bøggild (NBI)
C.Holm (NBI)
J.J. Gaardhøje (NBI), ch
J.Y. Grossiord (Lyon)
T. Malkiewicz (Jyvaesk.)
B.S. Nielsen (NBI)
G. Paic (Mexico)
W. Trzaska (Jyvaeskyla)
8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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FMD ’inner’ protype before dicing
2 sectors of 512 strips
Test structures on 6” wafer
Hamamatsu
8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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Bonding pads and bias resistors
8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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ALICE-FMD inner sensor
8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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First 3 inner sensors delivered at NBI-Feb 2005
TDR Specs: Full depletion voltage 50-100V
Measure: full depletion voltage: 75 -80V.
TDR specs: thickness = 310 μm +- 10 μm
Measure: t= 323 μm +- 1 μm
8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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First test of FMD inner Si sensorsLeakage currents
0
50
100
150
200
250
300
350
400
0 50 100 150 200 250 300 350
Bias voltage (V)
Cu
rren
t (n
A)
Serial no 1
Serial no 2
Serial no 3
Stability test
0
50
100
150
200
250
0 20 40 60 80 100 120 140 160
Time (hours)
Leak
age
curr
ent (
nA) Serial no 1 ?
TDR Specs: < 3 μA
Measure: < 0.3 μA
< 0.3 nA /strip
Full-depletion voltage: 75 V
Measure: < 2.5 pF/strip (bulk)
168 hr long-term stability test of leakage current at 200V
1/C^2
0,000
0,020
0,040
0,060
0,080
0,100
0,120
0,140
0,160
0,180
0,200
0 50 100 150 200 250 300
Bias voltage (V)
1/C
^2
(1
0^
-6 p
F^
-2)
Serial no 1
Serial no 2
Serial no 3
8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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FMD Hybrid card w. 8 x (128 ch) preamplifiers
8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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VA_ALICE 128 ch preampl
8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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Test of FEE card with 8 VA_ALICE preamplifier chips
8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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FEE card test results
I MIP 22400 e-
3.5 fC
Gain 20 mV/fC =>
20MIP 1.4 V
TDR: C=0pF => N=310e-, C=25pF => N=410e-
Measure: C=0pF : N=200e-
Expect for C=25pF: N~300e- => S/N= 22400/300=75.
8-3-05 Jens Jørgen Gaardhøje. NBI. ALICE-CR5
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RCU-USB test at NBI with PC&TPC-FEE card
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FMD milestones adjusted to new ALICE installation schedule • Production of VA_ALICE chip
done• Delivery of prototype hybrid cards done• Delivery of prototype Si sensors Feb-05
done• Prototype digitizer boards produced April-05• Lab tests Si-FEE-Digitizer-RCU Jun-05• Rad. hardness studies of FEE&digitizer May-05• Place Si production order Jun-05• Delivery Si & FEE Nov-05• Bonding at CERN Dec-05• Mechanics RB26 completed Feb-06• Full system test with DAQ Dec-05• Sector (half ring) rad. test Jan-06• Detector assembly RB26 Mar-06• Detector assembly RB24 Jun-06• Ready for installation RB26 May-06• Ready for installation RB24 Sep-06