Tracker Subsystem1 GLAST LAT Project FM1/3 PSR, April 20, 2005 GLAST LAT Tracker Tower-1/3 Pre-Ship...
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Transcript of Tracker Subsystem1 GLAST LAT Project FM1/3 PSR, April 20, 2005 GLAST LAT Tracker Tower-1/3 Pre-Ship...
Tracker Subsystem 1
GLAST LAT Project FM1/3 PSR, April 20, 2005
GLAST LAT TrackerGLAST LAT Tracker
Tower-1/3 Pre-Ship ReviewTower-1/3 Pre-Ship Review
INFN-Pisa
Tracker Subsystem 2
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 - Assembly and test highlightsTower 1 - Assembly and test highlights
• Feb 14-21, 2005 (INFN-Pisa) : – assembly (tray stack, cables,
sidewalls, alignment, turn-over) – test (CPT)
• Feb 28 - Mar 14, 2005 (Alenia-Roma) : – VIB test– TVAC test: noise anomaly on layer
X16 (see NCR INFN/PI-430)
• Mar 17-19, 2005 (INFN-Pisa) : – Replacement of tray 17 (M063)
• Apr 5-15, 2005 (Alenia-Roma) : – New VIB test– New TVAC test
• Apr 19, 2005 (Roma)– Through customs in Roma airport
• Full EIDP details at: – http://glast.pi.infn.it (soon available)– Quality Assurance page– EIDP links
Tracker Subsystem 3
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 - Assembly and components detailsTower 1 - Assembly and components details
Tower PN: LAT-DS-00722 (rev3)Tower SN: 1
Tracker Subsystem 4
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 - ConfigurationTower 1 - Configuration
Configuration:
• Kapton tape applied on the flex cables only on termination resistors
• Poron foam 0.047 THK used on bottom tray sides +Y and –Y (1 foam layer on cables)
• 3 layers of Poron foam 0.047 THK used on Bottom Tray X sides and Top Tray -X (in place of 5 layers of 0.037)
• Substitution of tray 063 according procedure in Annex 2 NCR/FM/INFN-PI-430
• See NCR/FM/INFN-PI-430 & NCR/FM/INFN-PI-435 for more details
Tracker Subsystem 5
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 - Alignment dataTower 1 - Alignment data
Tower Half Width Status Max
Nominal N/A 185.875
Max N/A 186.250
+X passed 185.963
+Y passed 186.091
-X passed -186.001
-Y passed -185.977
Tower Full Width Status Max
Nominal N/A 371.750
Max N/A 372.50
X passed 371.964
Y passed 372.068
Washer Plane Status Max
Nominal N/A 186.530
Max N/A 186.750
+X passed 186.453
+Y passed 186.492
-X passed -186.408
-Y passed -186.502
Tower Full Width Status Max
Nominal N/A 373.060
Max N/A 373.500
X passed 372.862
Y passed 372.994
All measurements within stay-clear and within specification.
Flexure Cone Status Theta Phi Gamma Z Radial Offset FCS X Offset FCS Y Offset Alpha Beta
Nominal N/A 0.000 0.000 0.000 -37.420 0.000 0.000 0.000 0 0
Tol Corner N/A +/- 0.404 +/- 0.483 N/D -37.670 0.870 N/D -0.690/+1.000 N/A N/A
Tol Side N/A N/D N/D N/D -37.670 0.870 N/D -0.350/+1.000 N/A N/A
0 passed 0.030 -0.070 0.000 -37.451 0.279 -0.279 -0.011 30 -72
1 passed 0.030 -0.070 0.000 0.000 0.296 -0.280 -0.094 32 -55
2 passed 0.064 -0.133 0.251 -37.439 0.172 -0.162 -0.058 18 -61
3 passed 0.030 -0.084 0.000 -37.372 0.158 0.150 0.049 16 116
4 passed 0.030 -0.084 0.000 0.000 0.149 0.149 0.010 16 101
5 passed 0.051 -0.043 0.129 -37.439 0.092 -0.026 -0.089 9 -11
6 passed 0.013 -0.001 0.000 -37.514 0.153 -0.106 -0.111 16 -35
7 passed 0.013 -0.001 0.000 0.000 0.137 -0.105 -0.088 14 -42
8 passed 0.040 -0.081 0.129 -37.458 0.116 -0.095 -0.067 12 -48
9 passed 0.048 -0.027 0.000 -37.392 0.138 0.127 0.053 14 120
10 passed 0.048 -0.027 0.000 0.000 0.129 0.129 0.003 13 98
11 passed 0.044 -0.003 0.251 -37.463 0.171 -0.156 -0.072 18 -56
Tracker Subsystem 6
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 - Alignment dataTower 1 - Alignment data
Bay to Tower Assembly
<50 microns offset Center BCS to TCS
≈0 deg rotational offset from BCS to TCS
Sidewalls Profile SCS
Same shape and dimension
Same stayclear margins
Difference worst case <50 microns
Additional Comments : after solithane ******************************* Item 5A, Location of TCS in BCS ******************************* XYZ Offsets from BCS to TCS (BCS is the active coordinate system)
DIM LOC29= POSIZIONE DI PUNTOTOWER_XY_ORIGIN
MM
AS MISX 0.002Y 0.028Z 30.189
Rotational Offset from BCS to TCS about XAXIS
DIM ANGL1= ANGOLO 2D (VERO) DA LINEABCS_YAXIS SU LINEA TCS_YAXIS
GR
AS MISA 0.001
Rotational Offset from BCS to TCS about YAXIS
DIM ANGL2= ANGOLO 2D (VERO) DA LINEABCS_ZAXIS SU LINEA TCS_ZAXIS
GR
AS MISA 0.026
Rotational Offset from BCS to TCS about ZAXIS
DIM ANGL3= ANGOLO 2D (VERO) DA LINEABCS_XAXIS SU LINEA TCS_XAXIS
GR
AS MISA 359.999
Additional Comments : after repair ******************************* Item 5A, Location of TCS in BCS ******************************* XYZ Offsets from BCS to TCS (BCS is the active coordinate system)
DIM LOC29= POSIZIONE DI PUNTOTOWER_XY_ORIGIN
MM
AS MISX 0.068Y 0.041Z 30.206
Rotational Offset from BCS to TCS about XAXIS
DIM ANGL1= ANGOLO 2D (VERO) DA LINEABCS_YAXIS SU LINEA TCS_YAXIS
GR
AS MISA 0.004
Rotational Offset from BCS to TCS about YAXIS
DIM ANGL2= ANGOLO 2D (VERO) DA LINEABCS_ZAXIS SU LINEA TCS_ZAXIS
GR
AS MISA 0.026
Rotational Offset from BCS to TCS about ZAXIS
DIM ANGL3= ANGOLO 2D (VERO) DA LINEABCS_XAXIS SU LINEA TCS_XAXIS
GR
AS MISA 359.999
Tracker Subsystem 7
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 - CG & MASSTower 1 - CG & MASS
Conclusions
Tower 1 well aligned and inside stayclear
Test after environmental tests skipped as per MRB 3/24/2005
Mass and CG near estimated values (when used real masses)
300
TOWER Total Mass (g) 32379 ESTIMATED (Solithane, adhesive, tape, glues not included)
TOWER Total Mass (g) 32885 MEASURED
43602825
TOWER+BP+CHP Mass (g) 39564 ESTIMATED (Solithane, adhesive, tape, glues not included)
243.233 ESTIMATED (Solithane, adhesive, tape, glues not included)
TOWER+BP+CHP Mass (g) 40070 MEASURED
243.95 MEASURED
TWR+BP+CHP CG from Flexures
TWR+BP+CHP CG from Flexures
Tower CG from Flexures
Base Plate (g)Cables Holding Plate (g)
Tracker Subsystem 8
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 – Open NCRsTower 1 – Open NCRs
• INFN/PI-424: Noise anomaly on layer Y0, ladder 3.– Appeared once at first TVAC cycle and never showed again.
– As per MRB held on March 21, 2005, the NCR can be closedthe NCR can be closed.
• INFN/PI-430: Malfunction of layer X16, ladder 0.– Consistently observed in vacuum.
– The tray has been replaced and it’s now under investigation.
– New VIB and TVAC tests passed successfully.
– As per MRB the NCR can be closedthe NCR can be closed.
• INFN/PI-459: Vacuum level out of specification.– Common to Tower 3, see following slides.
• INFN/PI-461: Communication problem when reading the two towers together.– Common to Tower 3, see following slides.
Tracker Subsystem 9
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 - disconnected channelsTower 1 - disconnected channels
Disconnected channels vs time/temperature
0
50
100
150
200
250
300
Nu
mb
er o
f D
isco
nn
ecte
d c
han
nel
s
Layer X17
Layer Y3
Layer Y0
All layers
• ~ 250 disconnected channels overall (less than 0.5%).• Number of disconnected channels basically stable throughout the environmental tests.• The small variation is almost completely due to three layers (related NCRs at the tray level closed):
• X17 – some cracks on the pitch adapter, no change at all through TV cycles• Y0, Y3 – most likely it’s a delamination issue
Tracker Subsystem 10
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 - EfficiencyTower 1 - Efficiency
• Overall efficiency (as measured during the post-TV CPT) at the tower level is 99.6%.
Tracker Subsystem 11
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 3 - Assembly and test highlightsTower 3 - Assembly and test highlights
• Mar 15-29, 2005 (INFN-Pisa) : – assembly (tray stack, cables,
sidewalls, alignment, turn-over)
– test (CPT)
• Apr 4-15, 2005 (Alenia-Roma) : – VIB test
– TVAC test:
• Apr 19, 2005 (Roma) :– Through customs in Roma airport
• Full EIDP details at: – http://glast.pi.infn.it (soon available)
– Quality Assurance page
– EIDP links
Tracker Subsystem 12
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 3 - Assembly and components detailsTower 3 - Assembly and components details
Tower PN: LAT-DS-00722 (rev3)Tower SN: 3
Tracker Subsystem 13
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 3 - ConfigurationTower 3 - Configuration
Configuration:
• Kapton tape applied on the flex cables as per Annex to NCR/FM/INFN-PI-435)
• Poron foam 0.037 THK used also for bottom tray sides +Y and –Y ( 3 Kapton tape layers + 1 foam 0.037 layer)
• 4 layers of Poron foam 0.037 THK used on Bottom Tray –X side (in place of 5 layers)
Tracker Subsystem 14
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 3 – Open NCRsTower 3 – Open NCRs
• INFN/PI-439: Disconnected channels on the bottom tray.– 38 disconnected channels found after the tray assembly– Increased up to 70 after the thermal cycles at the tray level (delamination issue)– Some further fluctuation during the tower environmental test– As per MRB the NCR can be closedthe NCR can be closed.
• INFN/PI-452 minor: Little scratch on one of the wafers of LGT 014.– Occurred while connecting cable 6 – J2 connector.– The layer has been continuously monitored during the tower environmental tests– The NCR can be closedThe NCR can be closed.
• INFN/PI-473 minor: Wrong positioning of the shock recorder on the ISC.– The shock recorder is rotated by 180 degrees on the x-y plane with respect to its nominal
position.– The proposed disposition is close the NCR and use as is.
• INFN/PI-459: Vacuum level out of specification.– Common to Tower 1, see following slides.
• INFN/PI-461: Communication problem when reading the two towers together.– Common to Tower 1, see following slides.
Tracker Subsystem 15
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 3 - Alignment dataTower 3 - Alignment data
Flexure Cone Status Theta Phi Gamma Z Radial Offset FCS X Offset FCS Y Offset Alpha Beta
Nominal N/A 0.000 0.000 0.000 -37.420 0.000 0.000 0.000 0 0
Tol Corner N/A +/- 0.404 +/- 0.483 N/D -37.670 0.870 N/D -0.690/+1.000 N/A N/A
Tol Side N/A N/D N/D N/D -37.670 0.870 N/D -0.350/+1.000 N/A N/A
0 passed 0.010 -0.112 0.000 -37.463 0.344 -0.336 -0.075 37 -58
1 passed 0.010 -0.112 0.000 0.000 0.345 -0.337 -0.076 37 -58
2 passed 0.106 -0.242 0.331 -37.405 0.021 -0.017 0.012 2 -125
3 passed 0.071 -0.265 0.362 -37.304 0.146 -0.144 0.028 15 -93
4 passed 0.071 -0.265 0.362 0.000 0.170 -0.142 0.092 18 -113
5 passed 0.128 -0.074 0.251 -37.425 0.127 -0.071 -0.105 13 -27
6 passed 0.010 -0.084 0.000 -37.453 0.052 0.034 -0.040 5 43
7 passed 0.010 -0.084 0.000 0.000 0.075 0.036 -0.066 8 32
8 passed 0.068 -0.087 0.173 -37.405 0.140 -0.135 -0.036 15 -67
9 passed 0.037 -0.138 0.000 -37.429 0.103 0.098 0.029 11 112
10 passed 0.037 -0.138 0.000 0.000 0.120 0.099 -0.068 12 62
11 passed 0.074 -0.221 0.251 -37.528 0.214 -0.154 -0.149 23 -34
Additional Comments : before solitane ******************************* Item 5A, Location of TCS in BCS ******************************* XYZ Offsets from BCS to TCS (BCS is the active coordinate system)
DIM LOC29= POSIZIONE DI PUNTOTOWER_XY_ORIGIN
MM
AS MISX -0.083Y -0.010Z 30.328
Rotational Offset from BCS to TCS about XAXIS
DIM ANGL1= ANGOLO 2D (VERO) DA LINEABCS_YAXIS SU LINEA TCS_YAXIS
GR
AS MISA 0.007
Rotational Offset from BCS to TCS about YAXIS
DIM ANGL2= ANGOLO 2D (VERO) DA LINEABCS_ZAXIS SU LINEA TCS_ZAXIS
GR
AS MISA 0.013
Rotational Offset from BCS to TCS about ZAXIS
DIM ANGL3= ANGOLO 2D (VERO) DA LINEABCS_XAXIS SU LINEA TCS_XAXIS
GR
AS MISA 359.997
All measurements within stay-clear and in spec
Tower Half Width Status Max
Nominal N/A 185.875
Max N/A 186.250
+X passed 185.939
+Y passed 185.967
-X passed -185.937
-Y passed -185.984
Tower Full Width Status Max
Nominal N/A 371.750
Max N/A 372.50
X passed 371.876
Y passed 371.951
Washer Plane Status Max
Nominal N/A 186.530
Max N/A 186.750
+X passed 186.443
+Y passed 186.602
-X passed -186.356
-Y passed -186.407
Tower Full Width Status Max
Nominal N/A 373.060
Max N/A 373.500
X passed 372.799
Y passed 373.009
Tracker Subsystem 16
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 3 - CG & MASSTower 3 - CG & MASS
Conclusions
Tower well aligned and inside stayclear
Test after environmental test skipped as per MRB 3/24/2005
Mass and CG near estimated values (when used real masses)
300.221
TOWER Total Mass (g) 32267.5 ESTIMATED (Solithane, adhesive, tape, glues not included)
TOWER Total Mass (g) 32895 MEASURED
43602810
TOWER+BP+CHP Mass (g) 39437.5 ESTIMATED (Solithane, adhesive, tape, glues not included)
243.359 ESTIMATED (Solithane, adhesive, tape, glues not included)
TOWER+BP+CHP Mass (g) 40065 MEASURED
244.249 MEASURED
TWR+BP+CHP CG from Flexures
TWR+BP+CHP CG from Flexures
Tower CG from Flexures
Base Plate (g)Cables Holding Plate (g)
Tracker Subsystem 17
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 3 – Disconnected channelsTower 3 – Disconnected channels
Disconnected channels vs time/temperature
0
50
100
150
200
250
Pre-th
erm
al c
ycle
s
Post-th
erm
al c
ycle
s
CPT bef
ore s
idew
alls
inst
alla
tion -
No Cab
le 0
(Pis
a)
CPT afte
r Cab
le C
0 in
stal
latio
n - upsi
de down (I
Pisa)
CPT afte
r turn
ove
r (P
isa)
CPT afte
r vib
e te
st (
ALENIA)
CPT vac
uum p
re-te
st
CPT durin
g rum
p up fr
om R
T to 1
st h
ot soak
CPT durin
g 1st
hot s
oak
CPT durin
g 1st
cold
soak
CPT durin
g 2st
hot s
oak
CPT durin
g 2nd c
old s
oak
CPT durin
g 3rd
hot s
oak
LPT tran
sitio
n from
3rd
hot 3
rd c
old s
oak
LPT tran
sitio
n from
3rd
hot 3
rd c
old s
oak <
T>=5C
CPT durin
g 3rd
cold
soak
LPT c
ross
ing 0
C durin
g ram
p up to
4th
Hot S
oak.
CPT 4
th H
ot Soak
.
LPT fr
om 4
th H
ot to 4
th c
old S
oak 3
0C
LPT fr
om 4
th H
ot to 4
th c
old S
oak 8
C
LPT fr
om 4
th H
ot to 4
th c
old S
oak -1
C
4th c
old S
oak C
PT
Rump to
am
bient t
emper
ature
LPT
CPT at a
mbie
nt in v
acuum
CPT at S
ATP
Nu
mb
er o
f D
isco
nn
ecte
d c
han
nel
sLayer X13 Layer X12Layer Y7 Layer X7Layer Y0 Y8All layers
• ~ 200 disconnected channels overall (less than 0.5%).• Number of disconnected channels basically stable throughout the environmental tests.• The overall variation is basically due to the fluctuations in the bottom tray.
Tracker Subsystem 18
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 3 - EfficiencyTower 3 - Efficiency
• Overall efficiency (as measured during the post-TV CPT) at the tower level is 99.6%.• The only layer out of spec is the bottom tray (see NCR INFN/PI-439)
Tracker Subsystem 19
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 and 3 – Communication problemsTower 1 and 3 – Communication problems
• Relevant NCR:– INFN/PI-461
• Symptoms:– Impossible to operate the two towers at the same time – except for the simple register tests– Both towers consistently 100% functional when tested one at a time– All the electrical tests foreseen by the procedure performed for the two towers in series
• Root cause:– The problem is still under investigation– It is clearly an issue with the EGSE/test setup and NOT an issue with the towers.
• Proposed disposition:– Continue the investigation, close the NCR INFN/PI-461 (on Tower 1 and 3) and open a
different NCR on the EGSE setup.
Tracker Subsystem 20
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 and 3 – Vacuum level out of specTower 1 and 3 – Vacuum level out of spec
• Relevant NCR:– INFN/PI-458, INFN/PI-459
• Non conformance:– The vacuum level at the first hot soak was 1.04E-4 torr (specs call for 5E-5), getting better in
the following cycles.
• Considerations and proposed disposition:– The annex to the two NCRs contains a details analysis of the data collected during the
environmental tests (explaining why INFN thinks that the goal of the test has been achieved), as well as suggestions for possible improvements of the test facility.
– See http://glast.pi.infn.it/database/scripts/newsrv/NCRAnnex/Annex1_to_NCR_FM_INFN_PI_459.doc
– The proposed disposition is use as is.
Tracker Subsystem 21
GLAST LAT Project FM1/3 PSR, April 20, 2005
Tower 1 and 3 - ConclusionsTower 1 and 3 - Conclusions
• Assembly and test highlights:– Both towers well aligned and within stayclear– The overall number of disconnected channels is very low– All the silicon layers (but the bottom tray of tower 3) close to 100% efficiency– First environmental test of a tower (tower 1) after the EMI taping successfully completed – A few NCRs needed the completion of the environmental tests to be closed
• Issues: Tower 1 - layer X16– Noise anomaly detected during the environmental tests.– The tray has been taken apart and replaced– Environmental tests at the tower level have been repeated. Investigation on the problematic
tray goes on in parallel
• Issues: Communication problems– Clearly due to the test setup, investigation is in progress– All functional tests performed with one tower at a time powered