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XXVI Workshop on Recent Developments in High Energy Physics and Cosmology

ATLAS Cathode Strip Chambers. Control System. Theodoros Argyropoulos NTUA DCS group Ancient Olympia 2008. XXVI Workshop on Recent Developments in High Energy Physics and Cosmology. Outlook. CSC Geographical Position Tools CSC Control System Conclusions.

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XXVI Workshop on Recent Developments in High Energy Physics and Cosmology

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  1. ATLAS Cathode Strip Chambers Control System TheodorosArgyropoulos NTUA DCS group Ancient Olympia 2008 XXVI Workshop on Recent Developments in High Energy Physics and Cosmology

  2. Outlook • CSC Geographical Position • Tools • CSC Control System • Conclusions • PVSS • FSM • FSM Architecture • Presentation of the user interfaces HEP 2008, Ancient Olympia

  3. CSC Geographical Position • Cathode Strip Chambers (CSCs) are placed in the small endcaps of the ATLAS • muonspectrometer. • High values of pseudorapidity, |η|>2. HEP 2008, Ancient Olympia

  4. CSC Chambers HEP 2008, Ancient Olympia

  5. Tools • PVSS provides tools to Graphic User Interface, archive... (basically monitoring and controlling the hardware) • SMI++ tools are used to model Devices and sub-system behaviour and to automate their operations. HEP 2008, Ancient Olympia

  6. PVSS II • PVSS II is a SCADA system. • SCADA stands for Supervisory Control • And Data Acquisition. • PVSS is used to connect to • hardware (or software) devices, • acquire the data they produce and use • it for their supervision, i.e. to monitor • their behavior and to initialize, • configure and operate them. • A PVSS II system consists of function- • specific managers known as managers. HEP 2008, Ancient Olympia

  7. …PVSS II • With PVSS II it is also • possible to • Interconnect a number of • autonomous systems into • an overall system. • This is the way that the • DCS system of the ATLAS • experiment works. • CSC sub-detector is one • of these subsystems. HEP 2008, Ancient Olympia

  8. Finite State Machines (FSM) • To reduce the number of parameters exported and managed in the supervisory layer; • To give a certain level of automation at complex Detector Control System; HEP 2008, Ancient Olympia

  9. ...Finite State Machines (FSM) • The “STATE” and “STATUS” are two aspects that work in parallel and • provide all necessary information about the behaviour of any system at any • level in the hierarchy. • STATE: defines the “operational mode of the system” • STATUS: gives more details about “how well the system is working”. • The STATUS is useful to find out faster the information when an • error occurs. • In ATLAS the STATUS names are fixed. HEP 2008, Ancient Olympia

  10. CSC Control System

  11. FSM Architecture Overall operation of the detector, control of all sub detectors. Full local operation of sub detector (divided according to DAQ partition) Not yet implemented HEP 2008, Ancient Olympia

  12. User Interface • With the use of PVSS, there was created • some expert panels for: • The User Interfaces for the people to • work with • Storing data in the Data Base • Creating the Alarm text/status for the devices • that are being used HEP 2008, Ancient Olympia

  13. User Interface – Main Node Alarm Table Commands Main Panel Status State Take actions Overview of the PS and the Temps of the side Secondary Panel Status & Alarms PS and Temps Alarms HEP 2008, Ancient Olympia

  14. Power Supply - Hardware • For the High Voltage we use: • 1 SY1527 CAEN Mainframe • 1 CAEN BranchControllerA1676 • 2 CAEN EasyCrates • 12 CAEN EasyBoards of type A3540P HEP 2008, Ancient Olympia

  15. Power Supply - Hardware • For the Low Voltage we use: • 6 Wiener Maraton power supplies • 3 Remote Control Modules (RCM) HEP 2008, Ancient Olympia

  16. Power Supply – User Interface Move Down to the chamber level Low Voltage State/Status Voltage & Current Histograms High Voltage State/Status HEP 2008, Ancient Olympia

  17. Power Supply – User Interface More Down Voltage & Current Actual Values Voltage & Current Settings Voltage & Current plots for all the channels HEP 2008, Ancient Olympia

  18. Power Supply – User Interface Channel Mapping Channel Details Change Channel Settings Voltage & Current Plots Switch Channel On & Off Configure the new Settings HEP 2008, Ancient Olympia

  19. Temperatures – User Interface Low Voltage State/Status Down to the ChamberLevel Change mode to HV PS Temperature Histogram Temperatures State/Status HEP 2008, Ancient Olympia

  20. Temperatures – User Interface Temperature Plot If the temperature of a Sensor exceeds the limit of 35 degrees all the channels of the chamber are switched off. Value & Alarm text Temps & LV State/Status HEP 2008, Ancient Olympia

  21. Conclusions • The System is installed as a Local Control System • Was tested by the CSC people and works. • Integrate it in the Muons Control System • Expand it to monitor the Gas and the • Cooling System HEP 2008, Ancient Olympia

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