Skip to content

This page provides an overview of the Quality control to ITk Production Database for Type-1 Power Services for ATLAS upgrade.

Type-1 Power Services for Pixel Outer Endcap

The ITk Pixel detector power distribution system aims to decrease material inside the tracker volume and reduce cable power losses to less than 30% of the provided power. Providing low voltage supply to each functional component of the detector would require a large number of cables that occupy the tracking area. The solution adopted to deal with this problem involves connecting the groups of modules in series on a single line. Generally, 16 modules can be connected in one serial powering line.

Type-1 Power Services are responsible for powering up the module and consist of LV, HV, and other types of communication cable named as CAN, VCAN, T-interlock, and IpEnable have different functionalities.

  • LV cables power up the electronics of the module.
  • HV powers up the sensor where signals are collected.
  • CAN is used for communication with the Monitoring of Pixel System (MOPS) chips.
  • VCAN is used to power up the (MOPS) chips.
  • T-interlock is used for temperature sensing, while
  • IpEnable has the task to trigger the front-end chip in low power mode, not activating all the functionality of the chip, but allowing it to perform limited tests.

Type-1 Power Services Quality Control (QC) Test

Type-1 Power Services undergoes a set of QC/QA tests that confirm the quality of the cables. * Visual Inspection Test: Inspecting the Patch Panel 1 Connector using the microscope after populating with the Serial Power Bundle.

  • Geometrical Test: It holds the non electrical test results, such as deviation in length from the nominal length from different quadrants (numeric value), starin relief arm angle check (boolean) , Envalop check (boolean) and mass measurements.

  • QC Electrical Test: For QC electric test, Cirris 4250 HV tester is used. It perform both the Low Volatge (LV) and High Voltage (HV) Test.

    • Low Volatge tests: LV test finds shorts, opens, checks connectiv between the power links.
      • Applied Voltage: 10-12 V.
      • If LV test failed -> No HV test would be possible. The test is terminated.
    • High Volatge Test: HV test qualifies the integrity of serial power cables and connections. For Type-1 Power Services, the HV test would be performed at 1.1kV for the Production Phase.
      • Dielectric Withstanding: designed to test against the electrical breakdown
      • Insulation Resistance: Verify that the leakage current failure.

  • Power Dissipation Test: To find the voltage drop across each Type-1 Serial power bundle.

  • The Quality Control testing procedure for each of the sub groups are provided below:

Type-1 Power Services: Quality Control to PDB Interface

The QC to PDB interface for the Type-1 Power Services following basics steps:

  1. Development of the Type-1 Power Bundle Component The Type-1 Power Bundle component is defined in the ITk PDB with the following basic structure provided below:

  2. Component Basic Info (Name, ATLAS SN, Institute, Status)

  3. Component Types: Each sub group has different types defined
  4. Component Stages: In how many stages this component is processed through
  5. Component Test: Each stages has associated test types, there can be multiple test in a single stage depending on the work flow.
  6. Component Properties: Each pixel sub groups has different requirements for the properties definitions

  7. Child List/ Parents List: depending on the sub groups requirements

  8. ITk PDB Component links for each Pixel sub groups are provided below:

  9. Development of the Type-1 Power Web App

Type-1 Power Web App acts as a bridge to upload the QC test results in the Production Database (PDB). This Web App is based on the streamlit multipage theme, its the outcome of the collabrative efforts by the pixel group. This Web App has two main sections.

  • Register App: One page template to perform the Type-1 Power Component registration in the PDB. PP1 are registered in DB (and quickly visually inspected) because they are expensive component that need tracking; Type-1 power have a PP1 child that must be assembled; These page manage these DB interactions.

  • QC App: This section has multiple pages to upload the QC test results into the PDB, for Type-1 Power Services the QC test are listed above. The flow of the upload works in order once the first test is uploaded it will directly move to the next test upload, also manage the stage progression.

Note: A valid ATLAS Component Serial Number is needed in order to proceed with the QC upload.

How to Connect to the Type-1 Web App

Following is the way to setup the App locally.

  1. The description of the streamlit Web App template can be found in the README file.
  2. Run the docker image as described in the README file.
  3. Once connected to the local port, it will open a web page
  4. Home page/ Authentication page of the App require your login details. once provided, press the get PDB token button. It will generate a PDB token that will lasts for one day, next time you have to create new one.
  5. The App is deployed on the web at Link
  6. The Type-1 Power Web App Home Page shows you how to create the PDB token.Type-1 Power Web AppHome Page

Type-1 Power Web App Functionalities

Documentation for OEC

You can find the related information from the data provided here:

Contact Information

  • Kenneth Wraight: (Kenneth.Wraight@glasgow.ac.uk)
  • Monika Weliers: (Monika.Wielers@cern.ch)
  • Luka SELEM: (luka.selem@cern.ch)
  • Stephan Eisenhardt: (S.Eisenhardt@ed.ac.uk)
  • Quratulain Zahoor: (qzahoor@cern.ch)
  • Juan Pablo Moraga: (j.p.moraga@ed.ac.uk)

Note: you have specific question on the hardware section of Type-1 Power Services for Pixel Outer Endcap, please do contact Stephan Eisenhardt, Juan Pablo Moraga and Quratulain for Type-1 Power Services.

Gitlab Repositories

Additional Information

  • Content on this page can be updated as needed.