MECHANICS in ATLAS Pixel Production Database



    The Mechanics subsystem Part Identifier has the format:

2021 2xx xxx xxxx

Stave and Sector Part Identifiers have to be put manually in the format:

2021 200 00 sssss where sssss is:

00000 00249     Thermal management Tile (TMT) left half
00250 00499     TMT right half
00500 00999     Omega
01000 01499     Stave aluminium tube assembly
01500 03999     Other stave and bi-stave parts
04000 04999     Bare stave
14000 14999     Stave assembly

05000 05099     Carbon-carbon plates
05100 05299     Aluminium tubes
05300 05599     Faceplates
09000 09999     Bare Sector
19000 19999     Sector Assembly

2021 200 80 00000 - 2021 299 99 99999  - sequential numbers to identify other items in the Mechanics subsystem.

 

Java application for Stave registering and assembling in the PDB:

There is an automatic way of new Stave registering and assembling from its components.
            Please get the file applications-ASSM-PDB.zip and unzip it.

You need the following files:

             java application archive file ASSEMBLY.jar, which you should put to C:\PixelPDB
            and add it to the CLASSPATH variable,

            CreateStave.BAT is the command file to run the application:

 

One should add the last 4 digits to the serial numbers (which must correspond to the Part Identifier format).

            If serial number of any component is not known the digits in the corresponding field must be cancelled!

            The Stave serial number must be put.

            The application checks if the Items with given serial numbers are registered in the PDB and not used in any
            other assembly. It also checks if the Stave with this serial number is not yet registered.

 

Java applications for StaveAssembly and SectorAssembly registering and assembling in the PDB:

            StaveAssembly and SectorAssembly are the assemblies containing several Module or ModuleFEIPrototype
            Items and 1 Stave or Sector Item; the last one defines the Assembly serial number.

            To register them in the PDB:

Please get the file applications-ASSM-PDB.zip and unzip it.

You need the following files:

             java application archive file ASSEMBLY.jar, which you should put to C:\PixelPDB
            and add it to the CLASSPATH variable,

            LoadSector.BAT and LoadStave.BAT are the command files to run the applications:

             

            One must insert the Sector serial number (14 digits), this is the bare Sector serial number, it will be
           used by the application to create the SectorAssembly serial number:

2021 20000 0xxxx -> 2021 20000 1xxxx.

            Module serial numbers: insert or 14 digits or 6 last digits, the application will recognize the whole Module
           (or ModuleFEIPrototype) serial number by applying the standard Part Identifier format for the Modules.

            One may give from 0 to 6 Module serial numbers using any position combination. In case of 0 Modules
           the SectorAssembly containing only bare Sector will be created.

            NEW: One may not only register new StaveAssembly or SectorAssembly, but also add Modules
           to any free position of the existing assembly.

            Bare Sector serial number is MANDATORY.

            The application LoadStave must be used in the same way, with only difference that it may add up to
           13 Modules (or ModuleFEIPrototype Items).

            Bare Stave serial number is MANDATORY.


    The Mechanics subsystem Tests and Java applications:

        Local Supports

        All the Local Supports test information should be associated with Stave or Sector Items.

        Stave tests

        StaveCC  ...................... Density of TMT C-C (without resin)
                                                 Percent of resin (Resin weight/Total Weight) after impregnation

        StaveAlLeak .............. Al tube He leak test result.

      !!!   Pressure resistance to 10 bar, bowing of the flat face of the tube.
               The Aluminium tube Item attribute “PASSED” is to be set up according to these test results.

        StaveWeight .............. StaveWeight

        StaveConduct............. Joule effect: Tmax, Tmin  + 3 images (4 shingles + 5 shingles + 4 shingles)

        StaveGeom................... Geometric tests:
                                                   Planarity for each shingle
                                                   Torsion angle for each shingle
                                                   Slope angle for each shingle

        StaveTherm ............... Deflection (difference between nominal to measured) at the central point of each shingle:
                                                 DY at 20 °C
                                                 DY at -10 °C
                                                 DDY =  DY(20 °C) - DY (-10 °C)  : deflection temperature drift

        StaveAltubeDrift ... Temperature drift  (measured at 20 °C and -10 °C) of the Aluminium tube inside the stave
                                                 DX left side
                                                 DX right side

        Sector tests

        The most important results from the QC/QA procedures are extracted from the detailed travellers
        accompanying the key components of the disk sectors and the overall assembly of the sectors.
        Files containing all QC/QA steps for the critical materials and assembly will be part of the database.

        SectorCC ...................... C-C Thickness
                                                  C-C Density
                                                  data file (All measurements of carbon-carbon plates)

        SectorAlTube   ........... data file (All measurements of aluminium tubes)

        SectorWeight ............. Sector weight (of final sector)

        SectorGeom ................. Planarity (after parylene coating)
                                                 Thickness (after parylene coating)

        SectorConduct ........... DTmax(Front) = Tmax (front C-C surface) – T (cooling liquid)
                                                  DTmax(Back) = Tmax (back C-C surface) – T (cooling liquid)
                                                  data file (Thermal performance)

        SectorSurvey ............. data file (Survey of sector coordinate system)
        SectorQC ...................... data file (All measurements of assembled sectors)
 


       Java application for Test Data Upload:

        Please get the file applications-Mech-PDB.zip and unzip it. The file contains:

             java application archive file MECHANICS.jar, which you should put to C:\PixelPDB
            and add it to the CLASSPATH variable,

            UploadLocalSupportTest.BAT command file to run the application,

            Examples of the input files for different tests:

            LocSup.txt – contains all the tests input file examples except 2, which are in the separate files:

            StaveGeom.txt and StaveTherm.txt

            Please put your data files to the directory from where you run an application, then you do not need
           to put the whole path to the filename field of the interactive window.

 

To learn more about Java applications please see General Help.