1 / 2

Tower 4 bottom tray A.Brez, Pisa13/4/2005

Tower 4 bottom tray A.Brez, Pisa13/4/2005. We have no new trays for tower 4!!. Use of Bottom tray 002 (tower “0” bottom tray).

vanida
Download Presentation

Tower 4 bottom tray A.Brez, Pisa13/4/2005

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. Tower 4 bottom trayA.Brez, Pisa13/4/2005 We have no new trays for tower 4!!

  2. Use of Bottom tray 002 (tower “0” bottom tray) NCR100:C) In the case that need to use as flight an encapsulated tray, a vibration test ( as per LAT-TD-00154 par. 8.2) has to be perform on a tray(encapsulated) dismounted from Tower"0" We are going to use the bottom tray 002 without the requested vibe test: There are no more spare bottom trays, in every case we must use this tray and this is the only way to meet Tower 4 schedule. Rationale: There is no time now to do the test The vibe test on a mid tray would be not fully predictive because it is done on a very different tray with very different mechanical properties. There is an experience of 6 successful vibe tests of towers with 27 SSD layers per tower with encapsulated ladders without any channel loss (124,000 bonds). The bonds along the ladders are more robust, but are more solicited during vibe test (first tray mode is a drum mode) The risk of a bonding failure is very little, much less than the risk of loss of channels on partially delaminated TMCMs that are currently in use The bottom tray 002 has successfully passed the thermal cycle with the old higher values (+50oC,-30oC) and there is one only disconnected channel. It is the best bottom tray ever made.

More Related