Development and characterization of the Monitoring of Pixel System (MOPS) chip to monitor the ATLAS ITk Pixel Detector / Rizwan Ahmad. Wuppertal, 20.09.2023
Inhalt
- Table of contents
- CERN and the Large Hadron Collider
- The ATLAS experiment
- Overview and sub-detectors of the ATLAS experiment
- The ATLAS ITk Pixel Detector
- Serial powering scheme for the detector modules
- Detector Control System (DCS) for the ATLAS ITk Pixel Detector
- Requirements for the new DCS system
- Proposed DCS concept of the Pixel Detector
- Current monitoring technology and its limitation
- Available commercial solutions
- Motivation to develop a new monitoring chip
- Integrated circuit development and radiation tolerance
- Development of Integrated Circuits (ICs)
- Effect of radiation on Integrated Circuits
- TID tolerance
- SEE mitigation
- First test prototype
- Purpose and components of the chip
- 3000 bits shift register for SEU studies
- Problems seen on the chip
- Outcome and lessons learned
- Monitoring of Pixel System (MOPS) chip
- Requirements for the chip
- Chip versions
- MOPS communication protocol
- Digital block
- Initialization scheme
- Top level state machine
- CAN node interface
- On-chip CANopen implementation
- Object dictionary
- ADC Interface
- Watchdog timers
- Automated Oscillator trimming
- Controller Area Network (CAN) protocol unit
- Data buffers
- Design techniques for a robust MOPS digital logic
- Improvements in the digital design and new features in the MOPSv2
- Digital logic verification and full-netlist simulation
- Analog block
- Power-on-Reset generator
- On-chip shunt LDO regulator
- Bandgap reference generator
- On-chip oscillator
- Custom low voltage CAN physical layer
- Analog to digital converter
- Analog block modifications and improvements in the MOPSv2
- Required external components and monitoring precision
- Measurement setup and test results
- Hardware/software parts of the testsetup
- Regulator, Bandgap reference and POR measurements
- Digital functionality
- ADC characterization
- Operation with realistic services
- Operational temperature and performance
- Scope of measurements
- Startup performance
- Temperature cycling between -40 °C to +60 °C during operation
- Long term stability / reliability at +60 °C
- Summary
- Radiation tolerance of the MOPS chip
- Packaging and production
- Conclusion and future work
- Acknowledgments
- Bibliography
- List of Figures
- List of Tables
- MOPS IO pads description
- MOPS CANopen object dictionary