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OB cell loading

Topics are discussed in the OB Cell Loading bi-weekly meetings. To follow these meetings, join e-group Outer-Barrel-Cell-Loading-WG@cern.ch

The Cell Loading process enables pixel modules to be bonded to pyrolitic graphite cells. This process is performed in OB by six institutes using a total of three different methods:

  • the method used by Japan (KEK and Kyushu) and CERN;

  • the method used by UniGe and Wuppertal;

  • the method used by LPSC (Grenoble) and CPPM (Marseille).

Data stored in the database

The components, stages and tests for the cell loading operation are still being optimised. The current status is summarised in this google sheet.

A graphical representation of the component types involved is available below. In orange are new components or components in the process of being integrated in this new position. In grey are auxiliary components that will not correspond to parts of the final detector.

Cell loading component types

Glue deposit at LPSC and CPPM

The method used by LPSC and CPPM relies on the CLApp, the cell loading application. It guides the operator through the different steps of the process. It simultaneously stores data in a custom database (YalDB) to be able later to monitor the performances of the process throughout the production. This app should then be able to dump the relevant information to ITk ProdDB.

This app runs locally to be able to adapt to the specificities of each lab. It then stores all the data in a database chosen by the user lab.

The documentation of the app is accessible through this link. A description is available in the following slides.