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RPC D etector C ontrol S ystem

RPC D etector C ontrol S ystem. Pierluigi Paolucci - I.N.F.N. of Naples. CMS Experiment Control. I.N.F.N. Naples. Run Controls (RCS): Configure and operate all local/global data taking sessions , Monitor and protect the measurements and the data flow.

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RPC D etector C ontrol S ystem

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  1. RPC Detector Control System Pierluigi Paolucci - I.N.F.N. of Naples

  2. CMS Experiment Control I.N.F.N. Naples Run Controls (RCS): Configure and operate all local/global data taking sessions, Monitor and protect the measurements and the data flow Based on the CMS online software framework (XDAQ – RCS) ad commercial products (DBs, SOAP, XML.....) Detector Controls (DCS): Setup and monitor the detectors and the environment Monitor and protect the apparatus equipment Based on industry standards (PLC, field buses, PVSS and JCOP tools)

  3. The CERN JCOP project has been designed to extend the PVSS II software package to the high energy physics experiment requirements. Channel DB Manager to define your hardware and software variables, define alarm, connect to hardware.. Panel Editor to create/modify your panels Alarm Handling to generate/monitor alarms Electronic Logbook operation logbook (JCOP) Archiving to archive your data (JCOP) State Machine (SMI) JCOP tool CERN JCOP project I.N.F.N. Naples Pigi Paolucci, I.N.F.N. of Naples

  4. Run Control & DCS I.N.F.N. Naples Central DCS Central RCS Interfaces already existing SOAP: RCS – DCS : commands and status ownership XDAQ – PVSS: data exchange DCS services Sub-Detector Controller Local DCS node Local XDAQ nodes Plans to install and test RCS-DCS demonstrator in PC farm at CERN in 2004 Electronics Setup, etc. Local DCS tree for HV, LV, P, T, etc. Pigi Paolucci, I.N.F.N. of Naples

  5. DCS demostrator I.N.F.N. Naples Global State Central Control Panel SubDetector States Services States SubDetector Control Panel Detector Subsystems Pigi Paolucci, I.N.F.N. of Naples

  6. DCS and Online Data Bases I.N.F.N. Naples • DCS environmental data is stored in PVSS Archive or in external Oracle DB (not yet available in PVSS) • DCS configuration data can be stored/ retrieved from DCS Oracle DB: • Test new Framework interface to Configuration DB • Build interface between Framework and CMS Equipment Management DB: • Already done for Rack Control Application - CMS • General hardware configuration (HV, etc.) – JCOP Delivery • Integration issues with RMCS, XDAQ, DCS, Sub-detector DBs Pigi Paolucci, I.N.F.N. of Naples

  7. HV system  480 + 378 ch. = 80+70 boards LV system  720 + 800 ch. = 60+70 boards Temperature 300 + ? ch. = 10+ ? boards Front End  4680 + 2544 FEBs Gas Cooling Rack, crate Ventilation RPC DCS sub-systems I.N.F.N. Naples CERN project Barrel & Endcap Pigi Paolucci, I.N.F.N. of Naples

  8. The RPC Detector Control System schema RPC DCS overview I.N.F.N. Naples RPC Barrel DCS HV LV temp FEB Gas Cooling From other DCS node 12 crates 80 boards 480 ch. 20 crates 60 boards 720 ch. 300 sensors 10 ADC About 5000 FEBs Pigi Paolucci, I.N.F.N. of Naples

  9. HV -480 channels (80 boards) placed in the 16 crates; Tender is started in December 03 and is finishedon May 04 Easy Prototype in July 04; Prototype Test in Naples/ISR from Sept 04; 20% of the system in Dec 04; Board test at CERN from Jan 05; Full system in Sept 05; Installation and commissioning 06. LV -720 channels (60 boards) placed in the 20 crates; CMS found a common solution; A3009 board with 12 ch.,2-8, V - 9A, 45 W, 5 boards/crate Tender at CERN 04; Full system available in Dec 05; Installation and commissioning 06. I.N.F.N. Naples DCS status overview I Pigi Paolucci, I.N.F.N. of Naples

  10. Temperature - 300 probes  readout 10 ADC boards; 100 probes installed (on the chambers); 250 probes ready at the assembling sites; An ADC/DAC board with 128 ch. is under design for ATLAS & CMS by the CAEN company; The board will be integrate in the EASY crate; Prototype and test in the 2004; Full production in the 2005. Front-end - 4680 Front End Boards 800 Link boards in 60 crates Control/monitor width, threshold and temperature monitor the RPC/FEB performances (occupancy, rate, noise….) Racks and crates, gas, cooling and ventilation:will be developed using a common solution/tools for the CMS sub-detectors. I.N.F.N. Naples DCS status overview II Pigi Paolucci, I.N.F.N. of Naples

  11. LV + Temp LB crate LV + Temp LB crate LV + Temp LB crate LV + Temp LB crate DCS connection Schema I.N.F.N. Naples Control Room SY1527 20 Bus lines 12 Bus lines HV distrib HV EASY Detector 300 Optical fibers @ 1.6 Gbit/s Pigi Paolucci, I.N.F.N. of Naples

  12. Our goal is to measure the iron gap temperature with a precision of 1oC in order to: compensate the HV working point in case of a large gradient of the temperature e/o atmospheric pressure; study the RPC aging and the current/noise behaviors taking into account this crucial parameter; Switch off the chamber/sector/wheel in case of “high” temperature. We have decided to use the Analog Device AD592BN transducer, after having tested different sensors. Temperature sensor I.N.F.N. Naples • AD592 temperature transducer • High Pre-calibrated Accuracy: 0.5oC max @ +25oC • Excellent Linearity: 0.158C max (0oC to +70oC) • Wide Operating Temperature Range: –25oC to +105oC • Single Supply Operation: +4 V to +30 V • Excellent Repeatability and Stability • High Level Output: 1 mA/K • Two Terminal Monolithic IC: Temperature In/Current Out • Minimal Self-Heating Errors Pigi Paolucci, I.N.F.N. of Naples

  13. The front end electronic boards communicate with the Link Board through the I2C bus; Each Slave LB receives data from up to 6 FEBs  96 strips; Each Master LB is connected to, not more, than 2 SLB; MLB transmits data to the control room via optical fiber; Each LB crate house up to 8 LBs and has 1 Control Board (CCU); The RPC continuous monitoring (noise rate, occupancy…) will have a refresh rate of about 30 sec; For each strip the events before and after windowing are counted during a defined period of time. That allows plotting of rates and efficiency; There are two 32-bit counters for each group of 128 channels/strips; The amount of data to be sent is 2*32*128 = 8 Kb/10s/LB/plot. Front End Board I I.N.F.N. Naples Pigi Paolucci, I.N.F.N. of Naples

  14. Additionally for the orbit synchronization there are ca. 4000 32-bit counters (1 for each bunch crossing) producing ca. 128 Kb of data / plot. But these probably can be read less often. The theoretical throughput of a CCU chain (up to 27 CBs) is 4 MB/s. The theoretical throughput of a LB box is 4 MB/s / 27 = 152 KB/s. The theoretical throughput of a Link Board is 152 KB/s / 8 = 19 KB/s. Required throughput for a continuous monitoring of one RPC is: 128 strips * 2 counters * 32 bits = 8 Kb/10s = 100 Bytes/s. The I2C communication does not contribute significantly to the total CCU load. The total bandwidth depends on the number of CB's in single CCU chain (serviced by a single FEC). Front End Board II I.N.F.N. Naples Pigi Paolucci, I.N.F.N. of Naples

  15. First examples Clusters Size Distribution Pigi Paolucci, I.N.F.N. of Naples

  16. Temperature: T Sensors300 * 4€ 1.2 K€; Chamber cable 0.6 Km *0.5€/m 0.3 K€; ADC cable 8 Km * 0.5€/m  4.0K€; ADC cable inst 8 Km * 3 €/m 24 K€; Cham Connect. 300 * 0.4 €  0.12 K€; ADC Connect. 600 * 0.4 € 0.24K€; ADC boards10 * 2000€  20 K€; FEB – I2C: I2C cable 6 Km * 5€/m 30 K€; I2C connector780 * 2 * 0.4€0.7 K€; I2C cable inst. 6 Km * 3 €/m18 K€; DCS Cost estimation I.N.F.N. Naples ~ 50 K € ~ 49 K € Total of~ 110 K€(10 KE for infrastructure) Pigi Paolucci, I.N.F.N. of Naples

  17. The HV tender is finished;a prototype will be ready in July 04. The production will finish in September 05. The CMS LV project is almost ready. The tender will start in a couple of months. The CAEN has a LV board designed for RPC. 100 out of 300temperature sensors (AD592BN) have been installed on the chambers and tested at the ISR. The Link Board project is going on. Next steps during the 3 test beams (June-Endcap/July-Bari/October-Barrel). The histograms and snapshots work well and have proved their usefulness in testing the performance of chambers. Afull time student from Naplesis working on the RPC DCS and we will have a first complete prototype (HV-LV-Temp) at the end of the 2004. There is an extra cost of about 50 KEuro due to the cost of the cable installation. Conclusions I.N.F.N. Naples Pigi Paolucci, I.N.F.N. of Naples

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