1. Requirements on a DCS system for GEM-based detectors Bernd Voss Helmholtzzentrum für Schwerionenforschung GmbH (GSI)

2. B. Voss 2 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Outline Aim Detector setup Overview Cylindrical GEM-TPC Planar GEM-Trackers DCS structure General & Design Options In-situ Hardware Requirements Control & Monitoring Concept Supplies & Support Gas Low & High-Voltage Cooling Off-site Slow control system PANDA DCS structure Observables & Conditions Parameters & Process Variables Possible Improvements Summary & Outlook

3. B. Voss 3 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Aim Present the status, the thoughts given and decisions made on the subjects so far Learn & Discuss about options Looking for advice for set up & Get it running

4. B. Voss 4 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 1 GEM-TPC (2 x ½) ‘ short version’ 1.2m (1.5m) GEM-Trackers (4) (GT1..4) Detector Setup Overview Target spectrometer@PANDA ‘V833’ 1 2 3 4

5. B. Voss 5 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Cylindrical ( ½ ) GEM-TPCPrototype Assembly GEM stack Drift electrode Cooling Support & LV- Distribution Front-End Electronic Pad Plane Support & Media- Distribution Sensor info

6. B. Voss 6 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Planar GEM-Trackers Design study Window Drift electrode GEM stack Pad Plane Support & Media- Distribution Cooling Support & LV- Distribution Front-End Electronic Shielding Cover & Read-out Plane Possible cabling hooks: central bar & circumference Sensor info

7. B. Voss 7 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 DCS structureGeneral It starts at the detector + its supplies + operation monitors It has to cope with various (sensor-) hardware, information pathways (WHICH information goes from WHERE to WHERE, communication protocols (I 2 C, SPI, CAN, Ethernet TCP/IP …) It has to deal with information for device-configuration, -control, -operation and supplemental ambient & operational conditions

8. B. Voss 8 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 System design options Separate sites: ‘in-situ’, ‘local’, detector-near systems µController, CPLD, DSP, FPGA, SPS (Siemens S7) etc… ‘off-site’, supply & electronics room ‚Zoo‘ of Hardware May involve various software solutions / SCADA systems Assembler, C, … EPICS LabVIEW MonALISA PVSS/UNICOS

9. B. Voss 9 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 In-situ PartHardware Requirements Dense & compact Local ‘intelligence’ & pre-processing Modular (test and p-o-p activities) Coping with the needs of a hostile environment Radiation tolerance Aging resistance Insensitivity to magnetic fields (no inductivities based on magnetic material) Communication via LWL So far, no appropriate candidates under investigation

10. B. Voss 10 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Detector Control & Monitoring Structure Current concept: Modular, expandable, flexible Hierarchical interlocking Failsafe operation Hard- & software limits History recording

11. B. Voss 11 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 In-situ Detector Control & Monitoring Concept Current concept: Modular, expandable, flexible Hierarchical interlocking Failsafe operation Hard- & software limits History recording Design: Placement on the rim of the Media-flange Questions: Should we go this way?

12. B. Voss 12 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Gas System Sensor info

13. B. Voss 13 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Mpod 19’’ Mainframe / Power bin (5k€) ten module slots primary HV power supply 600W for 1- 4 HV modules, expandable Controller with Ethernet / USB interface 9U high with frontal / lateral air inlet MPV 8008 LV module (1.5k€) 8 channels 0..8V, 10A, max. 50W, floating, low noise Sub-D high power connectors 1x for 4 ch Sub-D 37 pin for sense & control MPV 4015L LV module (1.4k€) 4 channels 0..15V, max. 2,5A, max. 50W, floating MPV 1008 LV module High Power (0.7k€) 4 channel, 2 Mpod slots 0- 7V, max. 115A, max. 500W, floating HPn 300 106 HV module (4.4k€) 0..-30kV, 10mA, 300W, Residual ripple < 10 -4 V outmax I/U Setting via 10-turn potentiometer RS 232 or CAN Interface LED Display (4 digit) 30 kV LEMO Connector ERA.3Y.425.CLL LEM30_CAB5, Lemo plug 30kV & 5m cable (180€) EHS 8060n_105_SHV HV module (2.6k€) 8 channels 0..-6 kV, 1mA/channel, Residual ripple < 50 mV 6HE-cassette with CAN-Interface (Enhanced Device Control Protocol) Resolution U/I Settings & Trip: 240 mV/ 40 nA Resolution U/I Measurement: 1200 mV/ 20 nA SHV-Connector with common GND Low- & High-Voltage supply Status: Power system delivered (ready-to-run) Needs installation nearby Sensor info

14. B. Voss 14 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Cooling System Findings: Overpressure system is preferable < 5 bar@entrance Water is insufficient, use HFE 7100 Cooling power > 5 kW@12,5°C Pressure drop over cooling system: < 1 bar (optimized) Mechanical stress 0,25 N/mm 2 Status: Cooling system delivered (ready-to-run) Needs installation nearby Sensor info

15. B. Voss 15 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 ‘Off-site’ PartSlow control system  PostgreSQL data base  HV values  Temperatures, flows etc.  Configuration of FEE  Queue based command exchange (back & front end)‏  Web front end for controlling and monitoring  Sensor signals digitized by a Siemens Simatic S7  Scalable and variable system  Mainly programed in C++ and PHP  Task of diploma student to set up the slow control  LabVIEW drivers / GUIs will be set up in parallel

16. B. Voss 16 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 DCS structureObservables & Parameters Observables (approx. 46 in 2000 channels for the GEM-Trackers) Overall status Temperature Pressure Flow (of media) Voltage Current Degradation (Ageing ?) ‘Special events’ (e.g. sparks) Indicators / quantities Analog / Digital / Boolean Voltage Current Charge (?) Hardware, Sensors / Transducers GEM-detector (generic) Supply (external) Gas supply HV supply LV supply Cooling (Chiller) Control (local@detector) Gas Flow Bias voltages High voltages FEB ROB DAQ Operation FEB ROB DAQ Calibration system …

17. B. Voss 17 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 PANDA DCS Requirements DBUI‘Parameters’ Currently 47 entries in table ‘Parameters’ for the GEM-based detectors

18. B. Voss 18 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 PANDA DCS Requirements DBUI ‘ProcessVariables’ Currently 46 entries (2000 channels) in table ‘ProcessVariables’ for the GEM-Trackers

19. B. Voss 19 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Structures & MethodsSuggestions I Needed information / structures: Structured Datasets allowing trees instead of simple and somewhat ‘unhandy’ flat presentation taking into account the definition of Detector Sub-Groups e.g. following the various stages and/or states of operation of the system (State Machine)

20. B. Voss 20 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Structures & MethodsSuggestions II Required, proposed methods: Easy-to-use multiple-entry interface for whole sets of data (scripting, ‚xml’ etc?) ‘Delete’ options for respective table(s) ‘Parameters’ definitions ‘ProcessVariables’ definitions Allow multiple usage of entries in table ‘ProcessVariables’ for different detector systems e.g. in cases where the same hardware is involved Possible improvement to existing features: Keep table-header information visible at any time for the data input Group Information in tables by multiple (logic) choices (e.g. GEM & Pressures & … etc.) ‘Connectivity’ definition comes ‘unhandy’ Define Interlock levels in more detail (e.g. ‘ALARM’ and ‘WARNING’) Specify clearly (variable named ‘Status’ is not helping much)

21. B. Voss 21 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Summary and Outlook Working on the topics we can currently approach / address Started with standalone solution / small scale for the lab use (PostgreSQL data base, LabVIEW) Requirements on time-scale: Requirements on support: Are there possible synergies between sub groups? 2009 FOPI GEM-TPC Beam-test pending 2010ELSA Installation & Operation … PANDA Construction of a PANDA GEM-TPC Prototype of a PANDA GEM-Tracker

22. Backup slides

23. B. Voss 23 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 Integration Working hypothesis on requirements  High-density cabling required  Use cabling as structural elements  Install in-situ intelligence to reduce cabling effort

24. B. Voss 24 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 DCS System‚In-situ‘ Part

25. B. Voss 25 DCS system for GEM-based detectors PANDA Week, Torino,June 15th 2009 DCS System‚Off-site‘ Part