TKR Tower 4 and 5 hand-off review – June 8,2005
GLAST LAT Project
GLAST Large Area Telescope:
Gamma-ray Large
Area Space
Telescope
TKR Hand-off review for Tower 4 and 5
Hiro Tajima
SU-SLAC
R. P. Johnson
UCSC
Hiro Tajima, TKR Tower 4 and 5 hand-ff review
1
TKR Tower 4 and 5 hand-off review – June 8,2005
GLAST LAT Project
Power Consumption
• Tower 5 is tested with I&T TEM/TPS which has somewhat
higher PS voltages.
• Values for MCM measurements account for the increase due to
PS voltage itself, not current increase due to voltage increase.
Tower 4
Pisa
SLAC
MCM
Tower total
10.17 W
9.86 W
9.26 W
Tower + TEM/TPS
18.8 W
19.3 W
N/A
Pisa
SLAC
MCM
Tower total
9.65 W
10.15 W
9.29 W
Tower + TEM/TPS
19.0 W
19.9 W
N/A
Tower 5
Hiro Tajima, TKR Tower 4 and 5 hand-ff review
2
TKR Tower 4 and 5 hand-off review – June 8,2005
GLAST LAT Project
Bad channels (Tower 4)
Laye r
Y17
X17
X16
Y16
Y15
X15
X14
Y14
Y13
X13
X12
Y12
Y11
X11
X10
Y10
Y9
X9
X8
Y8
Y7
X7
X6
Y6
Y5
X5
X4
Y4
Y3
X3
X2
Y2
Y1
X1
X0
Y0
Total
Fraction
Pre ship (Pisa)
Handoff (SLAC)
disconnect
disconnect
dead
noisy
0
6
0
1
0
2
0
0
0
1
1
0
0
0
0
0
2
0
0
0
0
0
20
0
45
0
1
0
50
0
0
0
1
0
1
1
132
0.24%
0
6
0
1
0
2
0
0
0
1
1
0
0
0
0
0
2
0
0
0
0
0
20
0
46
0
1
0
55
0
0
0
1
0
1
1
138
0.25%
0
4
0
1
0
0
0
0
0
0
0
1
0
0
0
0
0
0
2
1
0
0
0
5
1
1
2
0
0
1
1
0
0
0
0
2
22
0.04%
0
2
0
0
0
0
0
0
0
1
0
1
0
0
0
0
1
0
2
0
0
0
2
1
1
0
2
0
5
0
10
0
0
0
0
0
28
0.05%
Hiro Tajima, TKR Tower 4 and 5 hand-ff review
others
(offline)
0
1
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
1
4
0
0
1
1
1
0
0
0
1
13
0.02%
total
0
13
0
3
0
2
0
0
0
2
1
2
0
0
0
0
3
0
4
1
0
0
24
6
48
2
9
0
60
2
12
1
1
0
1
4
201
0.36%
3
TKR Tower 4 and 5 hand-off review – June 8,2005
GLAST LAT Project
Band Channels (Tower 5)
Laye r
Y17
X17
X16
Y16
Y15
X15
X14
Y14
Y13
X13
X12
Y12
Y11
X11
X10
Y10
Y9
X9
X8
Y8
Y7
X7
X6
Y6
Y5
X5
X4
Y4
Y3
X3
X2
Y2
Y1
X1
X0
Y0
Total
Fraction
Pre ship (Pisa)
Layer
Handoff (SLAC)
disconnect
disconnect
dead
noisy
0
2
3
0
0
4
0
0
5
0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
4
0
10
0
0
0
8
0
0
0
0
7
45
0.08%
0
2
3
0
0
4
0
0
5
0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
4
0
10
0
0
0
8
0
0
0
0
7
45
0.08%
0
0
0
0
0
1
0
0
0
0
0
1
0
0
1
0
0
0
1
0
0
0
3
0
0
0
0
0
0
0
0
0
0
2
1
2
0
0
0
0
6
0
0
2
4
1
3
7
0
2
0
0
0
31
0.06%
2
1
0
0
0
0
0
0
0
2
0
0
0
0
0
1
0
0
0
12
0.02%
Hiro Tajima, TKR Tower 4 and 5 hand-ff review
others
(offline)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
2
0
0
0
1
0
0
0
0
2
6
0.01%
total
0
3
3
0
0
8
0
0
5
0
0
1
0
0
1
0
2
4
3
0
1
0
0
6
5
0
16
4
1
3
16
0
3
0
0
9
94
0.17%
Y17
X17
X16
Y16
Y15
X15
X14
Y14
Y13
X13
X12
Y12
Y11
X11
X10
Y10
Y9
X9
X8
Y8
Y7
X7
X6
Y6
Y5
X5
X4
Y4
Y3
X3
X2
Y2
Y1
X1
X0
Y0
4
TKR Tower 4 and 5 hand-off review – June 8,2005
GLAST LAT Project
Hit Efficiency
Tower 4
Y0
X0
X1
Y1
Y2
X2
X3
Y3
Y4
X4
X5
Y5
Y6
X6
X7
Y7
Y8
X8
X9
Y9
Y10
X10
X11
Y11
Y12
X12
X13
Y13
Y14
X14
X15
Y15
Y16
X16
X17
Y17
average
pre-ship
99.4
99.5
99.8
99.8
99.8
99.7
99.6
98.3
99.7
99.4
99.6
98.6
99.6
98.4
99.9
99.8
99.9
99.8
99.9
99.9
99.9
99.8
99.9
99.8
99.7
99.8
99.8
99.9
99.8
99.8
99.9
99.9
99.9
99.9
99.1
99.5
99.63
error
0.07
0.07
0.04
0.04
0.04
0.05
0.06
0.11
0.05
0.07
0.06
0.11
0.06
0.11
0.03
0.04
0.03
0.04
0.03
0.03
0.03
0.04
0.03
0.04
0.05
0.04
0.04
0.03
0.04
0.04
0.03
0.03
0.03
0.03
0.08
0.06
0.01
hand-off
99.4
99.5
99.8
99.9
99.8
99.7
99.5
98.1
99.7
99.5
99.7
98.6
99.5
98.2
99.8
99.8
99.9
99.8
99.9
99.8
99.9
99.8
99.9
99.8
99.7
99.8
99.8
99.9
99.8
99.8
99.9
99.9
99.9
99.9
99
99.5
99.62
error
0.06
0.05
0.03
0.02
0.03
0.04
0.05
0.10
0.04
0.05
0.04
0.09
0.05
0.10
0.03
0.03
0.02
0.03
0.02
0.03
0.02
0.03
0.02
0.03
0.04
0.03
0.03
0.02
0.03
0.03
0.02
0.02
0.02
0.02
0.07
0.05
0.01
delta/error
0
0
0
1
0
0
-1
-1.3
0
1
1
0
-1
-1.3
-1
0
0
0
0
-1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-0.9
0
-1.3
Hiro Tajima, TKR Tower 4 and 5 hand-ff review
Tower 5
Y0
X0
X1
Y1
Y2
X2
X3
Y3
Y4
X4
X5
Y5
Y6
X6
X7
Y7
Y8
X8
X9
Y9
Y10
X10
X11
Y11
Y12
X12
X13
Y13
Y14
X14
X15
Y15
Y16
X16
X17
Y17
average
pre-ship
99.4
99.6
99.9
99.8
99.8
99.6
99.5
99.5
99.6
99.5
99.8
99.6
99.7
99.8
99.8
99.7
99.9
99.7
99.7
99.9
99.9
99.9
99.9
99.9
99.9
99.9
99.9
99.6
99.8
99.8
99.7
99.9
99.9
99.9
99.5
99.5
99.74
error
0.07
0.06
0.03
0.04
0.04
0.05
0.06
0.06
0.06
0.06
0.04
0.06
0.05
0.04
0.04
0.05
0.03
0.05
0.05
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.05
0.04
0.04
0.05
0.03
0.03
0.03
0.06
0.06
0.01
hand-off
99.4
99.5
99.8
99.7
99.8
99.6
99.4
99.3
99.5
99.4
99.8
99.6
99.6
99.7
99.8
99.8
99.8
99.6
99.8
99.8
99.8
99.8
99.8
99.8
99.8
99.8
99.7
99.6
99.8
99.8
99.7
99.9
99.9
99.8
99.5
99.4
99.68
error
0.06
0.05
0.03
0.04
0.03
0.04
0.06
0.06
0.05
0.06
0.03
0.05
0.05
0.04
0.03
0.03
0.03
0.05
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.04
0.04
0.03
0.03
0.04
0.02
0.02
0.03
0.05
0.06
0.01
delta/error
0
-1
-1
-1
0
0
-1
-2.0
-1
-1
0
0
-1
-1.0
0
1
-1
-1
1
-1
-1
-1
-1
-1
-1
-1
-2
0
0
0
0
0
0
-1
0.0
-1
-5.4
5
TKR Tower 4 and 5 hand-off review – June 8,2005
GLAST LAT Project
Trigger Efficiency
Tower 4
trigger combination
C0-1-2
C1-2-3
C2-3-4
C3-4-5
C4-5-6
C5-6-7
C6-7-8
C7-8-9
C8-9-10
C9-10-11
C10-11-12
C11-12-13
C12-13-14
C13-14-15
C14-15-16
C15-16-17
Pre ship
98.0
97.1
96.5
95.3
95.4
95.9
97.3
99.1
99.1
99.2
98.9
98.8
98.7
99.0
99.2
98.2
Hiro Tajima, TKR Tower 4 and 5 hand-ff review
handoff
98.1
96.8
96.3
95.1
95.3
95.7
96.9
98.9
99.0
99.0
98.8
98.8
98.7
99.0
99.2
98.1
Tower 5
Pre ship
98.0
97.9
97.3
97.2
97.7
98.1
98.4
98.5
98.9
99.0
99.2
98.9
98.8
98.6
99.0
98.4
handoff
97.8
97.6
97.0
96.8
97.3
98.1
98.1
98.5
98.5
98.7
98.6
98.3
98.4
98.5
98.9
98.2
6
TKR Tower 4 and 5 hand-off review – June 8,2005
GLAST LAT Project
NCR 516 for Tower 4
• Tower 4 failed to read out data from GTFEs in clock/DVDD
margin tests.
– All layers failed @ duty cycle 58%
– Layer Y4 low side failed @ duty cycle = 54 and 55%.
– Layer Y4 low side failed @ f = 22 MHz.
– Layer Y4 low side and Y1 high side @ DVDD = 2.46 V
(setting was 2.5 V)
• Margin tests performed for all MCMs during burn-in and final
test process. (No margin test in Italy.)
• Only possible fix: send tower back to Italy and replace Y4.
• Recommendation: Use it as is.
– It works perfectly at nominal duty cycle with 3% margin.
– It can readout all GTFE from high side on Y4 at 55% duty
cycle.
Hiro Tajima, TKR Tower 4 and 5 hand-ff review
7
TKR Tower 4 and 5 hand-off review – June 8,2005
GLAST LAT Project
Other Anomalies
• TE701 (Trigger Jitter test) failure on both towers.
– This is an issue of requirement interpretation.
– Working with trigger group to define clear requirement.
• Fit non-convergence for noise and gain test.
– Known issue from Italy.
– 65 channels on Layer Y13, Tower 4 are affected.
– These channels are confirmed to be functioning.
• Tower 5 failed clock duty cycle margin test @ 58%.
– It passed at 55% (within specification)
• Tower 5 passed noise and gain test.
– Past 6 towers all failed this test.
Hiro Tajima, TKR Tower 4 and 5 hand-ff review
8