-- EramRizvi - 20 Feb 2009

How to inspect DB geometries (Dominique 23/02/09)

Useful tags

• ATLAS-CSC-01-00-00 : nominal geometry
• ATLAS-CSC-01-02-00 : sectorwise Egg deformation + small random shifts

Here are two links to the geometry :

• https://twiki.cern.ch/twiki/bin/view/Atlas/AmdbSimrecFiles
• http://atlas.web.cern.ch/Atlas/GROUPS/OPERATIONS/dataBases/DDDB/tag_hierarchy_browser.php

The first link contains the raw AMDB files, which are gigantic, with the geometry description: P-lines, A-lines, ... I find it difficult to find anything there. Instead, I've been consulting the latter link as it's probably easier to find information.

If you click on one of the geometry tag on the left, you'll get a menu and can start navigating through the various component of the geometry, e.g.:

• click: ATLAS-CSC-01-02-00
• Expand: ATLAS-CSC-01-02-00
• Expand: MuonSepctrometer-R.01.01.Initial.Light_Egg_Rndm
• Expand: AMDB-R.01.01.Initial.Light_Egg_Rndm

The P-lines are located in APTP-R-02 The A-lines are located in ASZT-R-01

Entries that do not appear assume e.g. A-side = C-side. I don't understand the above fully, e.g. what happens when an IZ index isn't there, or a whole phi-sector (I) ? I'm guessing the previous set of values are used.

If you look at ATLAS-CSC-01-00-00, you'll see that there isn't any ASZT folder, so it seems to me that removing the random shift should then provide us with the egg only. In practice though, I don't know how to do this. I'm guessing it means creating a new tag and we have to ask someone (Stefania ?) to do this.