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Strips Conventions

The components are assigned serial numbers like 20 U XX YY NNNNNNN (without the empty spaces). An introduction into the ITk serial number convention can be found in General -> Serial Number Conventions.

'XX' - Sub-system Allocation

For the ITk Strips, the starting section of the serial number convention fixed. However the 'XX' section can be declared as in Table 1.

XX Usage
SG Strip General
SB Strip Barrel
SE Strip Endcaps

Table 1: Allocation of 'XX' for ITk Strips

SG should be used for any component that when produced/tested/assembled can go in either the barrel or endcap regions of the detector. For example, readout ASICs (ABC, HCC, AMAC). Otherwise, SB and SE is used to signify use in the Barrel and Endcap respectively.

'YY' - Component Allocation

The 'YY' part is used to identify the component the serial number is describing. For example, Sensor, Module, Bustape, Hybrid. In addition, 'YY' will also be used to describe the component type. For example, R0 Modules, Long Stave Bustape. Table 2 shows some examples of 'YY' allocations. These allocation will be shown in more detail in the following sections.

Component XX YY
Long Strip Module SB ML
Endcap R5 Sensor SE S5
Endcap R3 Powerboard SE P3
Short Strip X Hybrid SB HX

Table 2 : Examples of 'XX YY' allocations

The Allocated Serial Number Codes contains a list of all YY identifiers allocated for the Strip Subsystem of the database.

'NNNNNNN' - Unique 7-digit Number

The end of the serial number has an allocation for 7 numbers, 'NNNNNNN'. Used for component numbering, this would allow us to register 10,000,000 parts for each component type. As this far exceeds the numbers we need for any 1 component type, we can use some of these numbers for further part classification. As an example, the first digit NNNNNNN' could be used to identify

  • Vendor
  • Component Type Version

This allocation can be assigned on a part to part basis. More than one digit can be used for this. Hence the remaining digits can then be used for numbering.

Database Automation of Serial Numbers

Serial Numbers can be registered in the database in 2 ways

1) The database is told explicitly the serial number of the component/assembly by the user on registration

1
* It is possible to not set the serial number on registration, but at a later point in time<br>

2) The database allocated the serial number automatically on registration of the component/assembly

I parts of the 'NNNNNNN' Number are used for further details, component properties can set up to automat the process and ensure compliance with a schema.

It is prefered to use automatically generated serial numbers, but the database will ensure uniqueness when set by hand