1. Tracker Subsystem1 GLAST LAT Project FM15 PSR, Oct. 14, 2005 GLAST LAT Tracker Tower15 Pre-Ship Review Luca.latronico@pi.infn.it INFN-Pisa

2. Tracker Subsystem2 GLAST LAT Project FM15 PSR, Oct. 14, 2005 Tower 15 - Assembly and test highlights September 19-21, 2005 (INFN-Pisa) : –assembly of complete tray stack –incomplete cable set (C5 missing, C2 non- flight) –Sidewalls, alignment September 29 – Oct. 3, 2005 (Alenia-Roma) –TVAC (9/26-29) –VIB (9/29-10/3) October 5-11, 2005 (INFN-Pisa) : –C5 installation –C2 replacement –Solithane, EMI taping –Alignment verification, final CPT Full EIDP details at: –http://glast.pi.infn.ithttp://glast.pi.infn.it tray17 replacement tray to be replaced

3. Tracker Subsystem3 GLAST LAT Project FM15 PSR, Oct. 14, 2005 Tower 15 – configuration Tower PN: LAT-DS-00722 (rev3) Tower SN: 15 Environmental test performed with following configuration variations: C5 missing C2-008 non-flight installed in place of C2-020 Delivery configuration notes: Kapton and poron foam 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) Alignment well within stay-clear Measured mass 32.920 Kg

4. Tracker Subsystem4 GLAST LAT Project FM15 PSR, Oct. 14, 2005 Tower 15 – Open NCRs INFN/PI-589: environmental test in non-flight configuration –the environmental tests were performed with a missing cable (C5) and 1 non-flight cables (C2), as agreed by an MRB –Full flight set provided after environmental test and installed before delivery –the NCR can be closed INFN/PI-590: cold/hot power off/on not performed –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 –Update SLAC waiver LAT-XR-07340 to include tower 15? –the NCR can be closed INFN/PI-586: Vacuum level out of specification –The situation is similar to earlier TVAC tests and the proposal is to accept the test as for previous MRBs –Tower 8 performed TVAC test together with tower 15 and its relative NCR was closed during tower 8 preship review on 10/5 –the NCR can be closed

5. Tracker Subsystem5 GLAST LAT Project FM15 PSR, Oct. 14, 2005 Tower 15 - Efficiency taken in Alenia after TVAC All layers well within spec (eff > 98%) no changes in bad channels during env test pre-ship data analysis underway – results will be included in EIDP run 306001376 before env-test

6. Tracker Subsystem6 GLAST LAT Project FM15 PSR, Oct. 14, 2005 Tower 15 - Bad channels behaviour X0 and Y17 slightly exceed 16 during hot soaks

7. Tracker Subsystem7 GLAST LAT Project FM15 PSR, Oct. 14, 2005 Tower 15 - noisy channels behaviour Fluctuation are due to noisy channels