GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
GLAST LAT Tracker
Tower7/9 Pre-Ship Review
Luca.latronico@pi.infn.it
INFN-Pisa
Tracker Subsystem
1
GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
Tower 7 - Assembly and test highlights
tray17 replacement
•
June 14 - July 4, 2005 (INFN-Pisa) :
–
–
–
•
assembly of complete tray stack
incomplete cable set (C0,C1,C2,C3,C4,C7)
Sidewalls, alignment
July 7-15, 2005 (Alenia-Roma) :
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VIB, TVAC test RUN I
•
•
July 25-26, 2005 (INFN-Pisa) :
–
–
tray to be replaced
•
Aluminum service sidewall
C6 installation
Solithane, EMI taping
Alignment verification, final CPT
Full EIDP details (soon) at:
–
Tracker Subsystem
TVAC (7/28-8/4) RUN II
VIB (8/31) RUN II (Z axis only)
September 1-5, 2005 (INFN-Pisa) :
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–
–
•
Tray 17 replacement
C5 installation
July 28 – August 31, 2005 (Alenia-Roma)
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–
•
NCR 544 layerX17 noise anomaly
http://glast.pi.infn.it
2
GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
Tower 7 – Environmental test runs configurations
Tracker Subsystem
3
GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
Tower 7
Delivery configuration
Tower PN: LAT-DS-00722 (rev3)
Tower SN: 7
Details on NCR 530
Tracker Subsystem
4
GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
Tower 7 – Configuration and mechanical verifications
Configuration:
• Kapton tape and foam applied on the flex
cables as per LAT-DS-00722
• 4 layers of Poron foam 0.037 THK used on
Bottom and Top Tray (–X) side (in place of 5
layers)
• Base Plate assembly:
•Torque of nuts 5.3 Nm, spec is (5.08 +0.56/-0
Nm)
Alignment, Mass, COG:
Tracker Subsystem
•
Tower 7 well aligned and inside stayclear
•
Mass (32.705Kg) and CG near estimated
values (when used real masses)
•
Full data available from EIDP and INFN-PISA
web site
5
GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
Tower 7 – Open NCRs
•
INFN/PI-530: environmental test in non-flight configuration
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–
–
•
INFN/PI-543: layer X7 not read out (TVAC RUN I)
–
–
–
–
•
As per MRB decision, tray 17 (MID010) was replaced with a new tray, and tower7 retested
the NCR can be closed
INFN/PI-570: cold/hot power off/on not performed (TVAC RUN II)
–
–
•
X7 could not be readout at power up after vib test. X7 was properly read at the following and
first switch on during TVAC
The problem is due to a known and documented issue with resetting MCM (NCR 417) with
missing cables
To avoid the many and unknown number of power cycle needed to re-establish a good
configuration with as many readable layers as possible, hot/cold switch on and off were not
performed
the NCR can be closed
INFN/PI-544: layer X17 noisy at hot soak (TVAC RUN I)
–
–
•
both environmental test runs were performed with missing cables, as agreed by an MRB
As a consequence of the missing solithane, 4 screws loss nominal torque and 1 was halfway
unscrewed on one sidewall after Z-axis vibrations: the screws were re-torqued to spec and
the following X and Y axis vibrations did not show any torque loss
the NCR can be closed
Same as NCR 543
the NCR can be closed
INFN/PI-547: Vacuum level out of specification (TVAC RUN I)
–
The situation is similar to earlier TVAC tests and the proposal is to accept the test as for
previous MRBs. Tower 6 was tested with tower 7 RUN I and the same NCR was closed
Tracker Subsystem
6
Y17
20
Y2
15
X17
10
T W R 7 R e -T e s t L P T a t 0 fro m 4 th c o ld to R T
T W R 7 R e -T e s t L P T a t 0 C 4 th h o t --> 4 th c o ld s o a k
T W R 7 R e -T e s t L P T a t 3 0 C 4 th h o t --> 4 th c o ld s o a k
T W R 7 R e -T e s t L P T a t 3 0 C 3 rd c o ld --> 4 th h o t s o a k
T W R 7 R e -T e s t L P T a t 0 C 3 rd c o ld --> 4 th h o t s o a k
T W R 7 R e -T e s t L P T a t 0 C fro m 3 rd h o t to 3 rd c o ld s o a k
T W R 7 R e -T e s t L P T a t 3 0 C fro m 3 rd h o t to 3 rd c o ld s o a k
T W R 7 R e -T e s t L P T a t 3 0 C fro m 2 n d c o ld to 3 rd h o t
T W R 7 R e -T e s t L P T a t 0 C fro m 2 n d c o ld to 3 rd h o t
T W R 7 R e -T e s t L P T a t 0 C fro m 2 n d h o t to 2 n d c o ld
T W R 7 R e -T e s t L P T a t 3 0 C fro m 2 n d h o t to 2 n d c o ld
T W R 7 R e -T e s t L P T a t 3 0 C fro m 1 s t c o ld to 2 n d h o t
T W R 7 R e -T e s t L P T a t 0 C fro m 1 s t c o ld to 2 n d h o t
T W R 7 R e -T e s t L P T a t 0 C fro m 1 s t h o t to 1 s t c o ld
T W R 7 R e -T e s t L P T a t 3 0 C
T W R 7 R e -T e s t: C P T 1 s t H o t S o a k
T W R 7 R e -T e s t: C P T a t R T in v a c u u m
T W R 7 C P T R T in v a c u u m
T W R 7 L P T @ 0 C fro m 4 th h o t to 4 th c o ld
T W R 7 L P T @ ~ 0 C fro m 3 rd c o ld to 4 th h o t
7
Tracker Subsystem
L P T @ 0 C fro m 3 rd h o t to 3 rd c o ld
C P T @ 3 rd H o t S o a k
C P T at 2nd hot soak
L P T a t 0 fro m 1 s t h o t to 1 s t c o ld
L P T a t 2 5 fro m 1 s t h o t to 1 s t c o ld
CPT RT
C P T N o C a b le 5 6
•
•
R U N II
RUN I
T W R 7 R e -T e s t C P T a t R T in v a c u u m
NCR 534: 2 layers (Y2, X5) sometimes out of spec due to fluctuations in noisy channels; the
NCR can be closed
X17 fixed after tray M010 replacement
X5 showed 1 noisy ladder when ramping from 3rd cold to 4th hot soak: similar isolated
anomalies, appearing randomly and only once were observed in other towers and are very likely
caused by noise pickup dependent on the setup and/or the readout system (remember NCR
461 on the interference between the 2 towers DAQ causing test failures)
•
FM7/9 PSR, Sept. 9, 2005
GLAST LAT Project
Tower 7 – Bad channels
25
T K R T o w e r 7 B a d c h a n n e ls (n o is y + d e a d + d is c o n n e c te d )
X5
1 6 c h L e ve l
Y1
5
0
GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
Tower 7 - Efficiency
taken in Alenia after 2nd TVAC
•All layers well within spec (eff > 98%)
•Differences correlated to bad channels
•No change after z-axis vib retest
Tracker Subsystem
8
GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
Tower 7 TVAC – vacuum out of spec RUN I
Same behaviour as previous tests – TWR4 - TWR5 - Cold Plate
Same behaviour as tower6
proposal is to accept the test:
90
•Vacuum slightly higher than spec
TVAC, accepted during
80
(~> 10-4 vs 5x10-5 Torr) during hot
preship review
70 soaks
•Vacuum level improving with time
(corresponding NCR 546
60
•same pressure behaviour in dry
was closed)
50
run with MGSE
1.00E-02
1.00E-03
40
Temperature (°C)
30
20
1.00E-04
10
0
101 Cold Plate
102 Cold Plate +X
103 Cold Plate +Y
105 Cold Plate -Y
01 TWR7 center top
02 TWR7 top C-O -X
04 TWR7 swall -X n.1
10 TWR7 center bot
12 TWR7 bot C-O +X
32 TWR6 center top Tray
33 TWR6 top c-o -X
37 TWR6 swall -X n.1
40 TWR6 swall +X n.9
43 TWR6 bot c-o +X
-10
-20
-30
-40
1.00E-05
-50
-60
Pressurre
1.00E-06
-70
08/07/2005 08/07/2005 09/07/2005 09/07/2005 10/07/2005 10/07/2005 11/07/2005 11/07/2005 12/07/2005 12/07/2005 13/07/2005 13/07/2005 14/07/2005 14/07/2005 15/07/2005 15/07/2005 16/07/2005
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Tracker Subsystem
9
Date
GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
Tower 9 - Assembly and test highlights
•
July 8-15, 2005 (INFN-Pisa) :
–
–
–
•
July 25 – august 4, 2005 (Alenia-Roma) :
–
tray to be replaced
•
C0, C7 replacement with flight cables
C3 installation
Solithane, EMI taping
Alignment verification, final CPT
Full EIDP details (soon) at:
–
Tracker Subsystem
VIB, TVAC
September 5-7, 2005 (INFN-Pisa) :
–
–
–
–
•
assembly of complete tray stack
incomplete cable set (C0-non-flight,C3
missing,C7-non-flight)
Sidewalls, alignment
http://glast.pi.infn.it
10
GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
Tower 9 – Configuration and mechanical verifications
Configuration:
• Kapton tape and foam applied on the flex
cables as per LAT-DS-00722
• 4 layers of Poron foam 0.037 THK used on
Bottom and Top Tray (–X) side (in place of 5
layers)
• Base Plate assembly:
•Torque of nuts 5.4 Nm, spec is (5.08 +0.56/-0
Nm)
Alignment, Mass, COG:
Tracker Subsystem
•
Tower 9 well aligned and inside stayclear
•
Mass (32.840Kg) and CG near estimated
values (when used real masses)
•
Full data available from EIDP and INFN-PISA
web site
11
GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
Tower 9 – Open NCRs
•
INFN/PI-541: environmental test in non-flight configuration
–
–
–
•
INFN/PI-560: cold/hot power off/on not performed
–
–
•
environmental test were performed with missing cables, as agreed by an MRB
Missing cables are the consequence of the following NCRs
the NCR can be closed
To avoid the many and unknown number of power cycle needed to re-establish a good
configuration with as many readable layers as possible, hot/cold switch on and off were not
performed after a satisfactory running condition was found
the NCR can be closed
INFN/PI-559: layers X2 and X12 not read out
–
–
–
Despite the many power cycles it was never possible to reset the tower as to read these
layers; when a practical configuration was found with all layers readable but these 2, TVAC
was run with such two layers disabled
Post environmental test show no problem in the performance of these two layers (see next
slide)
the NCR can be closed
Tracker Subsystem
12
GLAST LAT Project
FM7/9 PSR, Sept. 9, 2005
Tower 9 - Efficiency
100
T o w e r 9 - ru n 3 0 6 0 0 1 3 0 3
E ffic ie n c y
99
98
E ffic ie n c y (% )
1 0 0 % e ffic ie n c y
9 8 % re q u ire m e n t
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
0
Y
X
X
Y
Y
X
X
Y
Y
X
X
Y
Y
X
X
Y
Y
9
X
9
Y
X
10
10
Y
X
11
11
X
12
Y
12
Y
13
X
13
X
14
Y
14
Y
15
X
15
X
16
Y
16
Y
X
X
Y
17
17
97
L a ye r
•All layers well within spec (eff > 98%)
•X2 @99.8%, X12@99.9%
•Total bad channels in tower ~50
Tracker Subsystem
13