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

Outlook HEP 2008, Ancient Olympia 2  CSC Geographical Position  Tools  CSC Control System  Conclusions  PVSS  FSM  FSM Architecture  Presentation of the user interfaces 19/4/2008

 Cathode Strip Chambers (CSCs) are placed in the small endcaps of the ATLAS muonspectrometer.  High values of pseudorapidity, | η |>2. CSC Geographical Position 3 HEP 2008, Ancient Olympia 19/4/2008

4 HEP 2008, Ancient Olympia CSC Chambers 19/4/2008

Tools 1.PVSS provides tools to Graphic User Interface, archive... (basically monitoring and controlling the hardware) 2.SMI++ tools are used to model Devices and sub-system behaviour and to automate their operations. 5 HEP 2008, Ancient Olympia 19/4/2008

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. PVSS II 6 HEP 2008, Ancient Olympia 19/4/2008

…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. 7 HEP 2008, Ancient Olympia 19/4/2008

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; 8 HEP 2008, Ancient Olympia 19/4/2008

...Finite State Machines (FSM) STATE: defines the “operational mode of the system” STATUS: gives more details about “how well the system is working”.  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.  The STATUS is useful to find out faster the information when an error occurs.  In ATLAS the STATUS names are fixed. 9 HEP 2008, Ancient Olympia 19/4/2008

CSC Control System 10

FSM Architecture Full local operation of sub detector (divided according to DAQ partition) Overall operation of the detector, control of all sub detectors. Not yet implemented 11 HEP 2008, Ancient Olympia 19/4/2008

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 12 HEP 2008, Ancient Olympia 19/4/2008

User Interface – Main Node State Status Take actions Alarm Table Main Panel Secondary Panel Commands Status & Alarms Overview of the PS and the Temps of the side PS and Temps Alarms 13 HEP 2008, Ancient Olympia 19/4/2008

Power Supply - Hardware  For the High Voltage we use:  1 SY1527 CAEN Mainframe  1 CAEN BranchController A1676  2 CAEN EasyCrates  12 CAEN EasyBoards of type A3540P 14 HEP 2008, Ancient Olympia 19/4/2008

Power Supply - Hardware HEP 2008, Ancient Olympia 15  For the Low Voltage we use:  6 Wiener Maraton power supplies  3 Remote Control Modules (RCM) 19/4/2008

Power Supply – User Interface High Voltage State/Status Low Voltage State/Status Voltage & Current Histograms Move Down to the chamber level 16 HEP 2008, Ancient Olympia 19/4/2008

Power Supply – User Interface Voltage & Current plots for all the channels Voltage & Current Actual Values Voltage & Current Settings More Down 17 HEP 2008, Ancient Olympia 19/4/2008

Power Supply – User Interface Voltage & Current Plots Channel Details Channel Mapping Switch Channel On & Off Change Channel Settings Configure the new Settings 18 HEP 2008, Ancient Olympia 19/4/2008

Temperatures – User Interface Temperatures State/Status Low Voltage State/Status Temperature Histogram Change mode to HV PS Down to the Chamber Level 19 HEP 2008, Ancient Olympia 19/4/2008

Temperatures – User Interface Temps & LV State/Status Value & Alarm text Temperature Plot 20 HEP 2008, Ancient Olympia If the temperature of a Sensor exceeds the limit of 35 degrees all the channels of the chamber are switched off. 19/4/2008

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 21 HEP 2008, Ancient Olympia 19/4/2008