1 / 12

7D: Tray test plans

Gamma-ray Large Area Space Telescope. 7D: Tray test plans. GLAST Large Area Telescope: Tracker Subsystem. Nicola Mazziotta University and INFN Bari - Italy mazziotta@ba.infn.it. Outline. Overview Tray test matrix Panel vib plan Tray thermal plan Test schedule Stacked cosmic rays.

daquan-west
Download Presentation

7D: Tray test plans

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Gamma-ray Large Area Space Telescope 7D: Tray test plans GLAST Large Area Telescope:Tracker Subsystem Nicola MazziottaUniversity and INFNBari - Italymazziotta@ba.infn.it

  2. Outline • Overview • Tray test matrix • Panel vib plan • Tray thermal plan • Test schedule • Stacked cosmic rays • Reference LAT Documents: • LAT-MD-00408, LAT Instrument Performance Verification Plan • LAT-SS-00788, LAT Environmental Specification • LAT-TD-01005, Thermal Test Results on Thick Converter Mock-up Trays • LAT-TD-01249, Thermal Test Results for Pre-Engineering Model Trays • LAT-PS-01584, LAT Tracker TraySSD Ladder Panel Assembly Procedure • LAT-TD-00154, Tray Vibration Test Plan • LAT-TD-01839, Tray Thermal Test Plan

  3. Tray test matrix

  4. Tray factory (panels) Vibration test* Ladder factory Tray assembly: ladders and MCMs on trays Stacked cosmic rays* Electrical test Tower assembly Electrical test before MCMs encapsulation Tray functional test* Tray thermal cycles* Overview *Environmental tests

  5. Panel vib levels Sine sweep White Noise Random vibration

  6. × Panel vib set up W side on the top • Accelerometers: • Control: two mono-axial accelerometers positioned on two of the four L-shaped block TP1&TP2 • Fixture: three mono axial accelerometers placed on a corner on one of the four L-shaped block TP6 • Tray: one three-axial accelerometers in the middle of panel TP5 • Centrotecnica set up: • - 1 LDS shake table • 2 fixtures • 9 read out channels • 4 tested trays/day rate

  7. Panel vib sequence thrust axis

  8. Tray thermal levels On orbit temperature range -15°C  30°C

  9. Tray thermal sequence The tray will be tested in its own service box.

  10. Test schedule Vib test rate ≥ 4 panels/day (Centrotecnica-Milano) Thermal test lot ≥ 4 trays/cycle in 4 climatic chambers (2 ready by Pg in Terni, 1 foreseen in Pi, 1 foreseen in Ba) Test rate/climatic chamber ∼ 1 tower/month

  11. Cosmic rays test Tray stacked in single view 2 stacks for a whole tower, readout with a single TEM

  12. Conclusions • The thermal and vibe tests on trays are well understood • The vibe test rate in Centrotecnica is adequate • The thermal test rate with the Perugia equipment in Terni is just sufficient, but the test lines will be doubled • The mechanics to perform cosmic rays tests is under construction. The flux allows a test in realistic time. The mini-tower experience will be the ground base to define the cosmic rays test.

More Related