Tracker Subsystem 1

GLAST LAT Project FM16 PSR, Nov. 4, 2005

GLAST LAT TrackerGLAST LAT Tracker

Tower16 Pre-Ship ReviewTower16 Pre-Ship Review

Luca.latronico@pi.infn.it

INFN-Pisa

Tracker Subsystem 2

GLAST LAT Project FM16 PSR, Nov. 4, 2005

Tower 16 - Assembly and test highlightsTower 16 - Assembly and test highlights

• October 25-28, 2005 (INFN-Pisa) : – assembly of complete tray stack (15 non-

flight trays)

– complete cable set (3 non-flight cables)

– sidewalls, alignment

• No environmental tests performed• No Solithane, No EMI taping• Full EIDP details at:

– http://glast.pi.infn.it

TOWER 16 is a spare, non-flight module and will be used for calibration studies

tray17 replacement

tray to be replaced

Tracker Subsystem 3

GLAST LAT Project FM16 PSR, Nov. 4, 2005

Tower 16 – configuration detailsTower 16 – configuration details

Tower PN: LAT-DS-00722 (rev3)Tower SN: 16

Tower 16 trays Tray Status Relevant NCR Location T023 NFH NCR PL 107 - declared NFH to shorten acceptance test - not needed

for flight towers 18

M010 NFH removed from tower7 (NCR 544, 562) Tested in vacum at INFN/RM2 17 M012 NFH NCR INFN/PI 79 - HV short on back (originally a tower0 tray) 16 M011 NFH NCR INFN/PI 76 - HV short on back (originally a tower0 tray) 15 M008 NFH NCR INFN/PI 78 - HV short on back (originally a tower0 tray) 14 M184 NFH NCR INFN/PI 109 - damaged front mcm-type CC closeout 13 M122 NFH NCR INFN/PI 466 - bad Front-End 2 on MCM 12 M173 NFH NCR INFN/PI 108 - damaged front mcm-type CC closeout 11 M063 NFH NCR INFN/PI 449 - short on ladder 0 during tower 1 TVAC test at 45C

(layerX16) 10

M148 NFH NCR INFN/PI 485 - Carbon-Fiber peeling of panel face-sheet 09 M046 NFH NCR INFN/PI 70 - MCM-sidewall stay-clear not enough for tower

integration (originally a tower0 tray) 08

M007 NFH removed from tower8 (NCR 551) Extra-test in vacuum at INFN/RM2 07 H067 FH 06

H069 FH 05

H079 FH 04

H081 NFH NCR PL 93 measurements out of spec and carbon-fiber peel 03 L015 NFH originally a tower0 tray; now NFH after noise anomalies found on trays

M010 and M007 (NCR 544, NCR 551) 02

L501 NFH rework of M059 - declared NFH (NCR 142) to shorten acceptance test - not needed for flight towers

01

B018 FH NCR INFN/PI 572 - removed from tower 14 because of a HV short on Ladder 4 detected during TVAC test - reworked now OK

00

15 non-flight trays:

• 5 from tower0 – some needed rework• 4 from flight towers 1,14,7,8 and showing anomalies at high T and/or vacuum – removed and reworked where necessary• 1 with anomalous GTFE• 5 with minor mechanical problems

3 non-flight cables:

• C0-023, C6-008, C7-009

Tracked in NCR INFN/PI 593

Tracker Subsystem 4

GLAST LAT Project FM16 PSR, Nov. 4, 2005

Tower 16 – functional test detailsTower 16 – functional test details

3 9issues to deal with when testing

Layer Tray Side MCM Bad Note n disc. n dead n noisy Bad n disc. n dead n noisy Bad (Low ENC) (Low ENC)

Y17 TOP 023 Back 2144 20 19 disconnected 19 1 1 21 19 1 1 21X17 Front 260 4 0 3 3 6 3 3X16 Back 263 0 0 0Y16 Front 391 0 0 0Y15 Back 453 160 160 disconnected 158 1 159 158 1 159X15 Front 385 <16 0 0X14 Back 346 <16 2 2 2 2Y14 Front 443 3 3 3 2 2Y13 Back 623 1 1 1 1 1X13 Front 11120 40 32 2 2 36 32 3 5 40X12 Back 11353 22 17 4 10 31 13 4 14 31Y12 Front 2282 2 2 2 4 2 2 4

Y11 Back 2028 69Non working GTFE 2, but data and trigger works fine

(after ~1hr)1 66 2 69 1 66 2 69

X11 Front 529 17 17 disconnected 13 1 1 15 13 1 1 15X10 Back 881 15 14 disconnected 9 1 10 5 1 6Y10 Front 448 23 22 22 22 22Y9 Back 436 4 2 1 1 4 2 1 1 4X9 Front 2652 1 1 1 1 1X8 Back 2576 3 2 4 6 2 7 9Y8 Front 458 1 1 1 1 1Y7 Back 468 3 3 3 3 3X7 Front 259 7 3 3 3 3X6 Back 314 2 3 3 1 3 4Y6 Front 2654 0 7 3 10 7 7 14Y5 Back 3156 2 2 2 2 2X5 Front 2681 0 0 0X4 Back 3273 1 0 6 6Y4 Front 11504 7 7 1 1 9 7 1 2 10Y3 Back 3175 3 2 2 4 2 1 3X3 Front 13077 7 1 2 3 1 1 3 5X2 Back 3254 3 3 3 2 5 7Y2 Front 627 22 22 2 24 22 2 24Y1 Back 631 6 3 3 3 3X1 Front 13086 0 8 disconnected 0 0X0 Back 351 12 2 2 2 6 3 2 3 8

Y0 BTM 018 Front 2693 13Short found after twr assy, solved removing few dead

chans5 8 3 16 6 7 2 15

Total 323 105 52 480 317 109 71 497

Fraction 0.87% 0.90%

Tower in assembly jig (INFN/PI--85) Tower CPT before ship (INFN/PI--86)

MID 010

LGT 501

MID 046

MID 007

MID 184

MID 011

HEA 081

MID 148

Tray test

MID 173

MID 063

MID 008

Tower 16

MID 122

MID 012

HEA 067

HEA 079

HEA 069

LGT 015

from tower 8: crazy ladders @ Hi T

From Tower 0

from tower 7: crazy ladders @ Hi TGTRC LO, Front Side, Not working

HV Short in Vacuum

Fiber peeling

From Tower 0:Connectors Out of Stay-clear

layers with more than 16 bad chans or rare anomalies

Overall bad channelsTracked in NCR INFN/PI 594

Tracker Subsystem 5

GLAST LAT Project FM16 PSR, Nov. 4, 2005

Tower 16 – efficiency performanceTower 16 – efficiency performance

0

5

10

15

20

25

30

35

40

45

50

55

60

65

70

Y17X17X16Y16Y15X15X14Y14Y13X13X12Y12Y11X11X10Y10 Y9 X9 X8 Y8 Y7 X7 X6 Y6 Y5 X5 X4 Y4 Y3 X3 X2 Y2 Y1 X1 X0 Y0

Layer

Bad

ch

ann

els

90

92

94

96

98

100

102

104

106

108

110

Eff

icie

ncy

Disconnected

Masked (hot/disc)

Efficiency (%)

100% efficiency

98% requirement

Tower 16 - run 306001498

Average tower efficiency is 99.5% (waiting enough for FE2 on Y11 to warm-up and taking into account also Y15 with ~160 bad chans)