Overview of the process of the system:

• One MFC at the input regulating by stabilizing the density of the gas inside the chamber
• One MFC at the output working at fixed flow (25 nl/min)
• Injection with one MFC that injects when required: it keeps the pressure at the buffer input of the compressor stable
• One MFC as bypass of the compressor to stabilize compressor itself. It should keep the pressure at the buffer output constant
• A set of valves and actuators that are opening and closing depending on the operating modes

Discussion on the components:

• Naming in the P&ID will probably be reviewed by gas team to be consistent with other systems
• Two chamber pressure sensors for two different ranges. Better if digital and if they can be integrated in the PLC
  • Discussion about the possibility to add an analog sensor in parallel and use it for redundancy and fail-safe modes
• I/O resolution requirements of at least 16 bit: it should be feasible, to check integration with electrical part and PLC control

Operating modes of the TPC

• Cleaning mode of TPC
• Filling of TPC
• Nominal run of TPC
  • Injection self controlling
• Normal evacuation of the gas
• Emergency evacuation of the gas

Storage and data availability

• All parameters and values could be published via dip.
• Parameters will be accessible by operators through the control panel

Actions:

• Gianluca to send an example of FA to AMBER people so that they can understand how the control system application is described
• Check the report done by HSE to see if there is any particular thing to implement in the control system for safety
• In the future review the cabling and electrical part requirements with Patrick Carrié: dedicated visit on site but should be organized when there is no data taking ongoing