RPC Detector Control System Pierluigi Paolucci I N

RPC Detector Control System 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 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)

CERN JCOP project I. N. F. N. Naples 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 06/03/2021 Pigi Paolucci, I. N. F. N. of Naples 3

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

DCS demostrator Global State I. N. F. N. Naples Central Control Panel Sub. Detector States Services States Sub. Detector Control Panel Detector Subsystems 06/03/2021 Pigi Paolucci, I. N. F. N. of Naples 5

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

RPC DCS sub-systems 1. 2. 3. 4. I. N. F. N. Naples 480 + 378 ch. = 80+70 boards LV system 720 + 800 ch. = 60+70 boards Temperature 300 + ? ch. = 10 + ? boards Front End 4680 + 2544 FEBs HV system Gas 6. Cooling 7. Rack, crate 8. Ventilation 5. 06/03/2021 CERN project Pigi Paolucci, I. N. F. N. of Naples 7

RPC DCS overview I. N. F. N. Naples The RPC Detector Control System schema RPC Barrel DCS HV 12 crates 80 boards 480 ch. 06/03/2021 LV 20 crates 60 boards 720 ch. temp 300 sensors 10 ADC FEB About 5000 FEBs Pigi Paolucci, I. N. F. N. of Naples Gas Cooling From other DCS node 8

DCS status overview I I. N. F. N. Naples • HV - 480 channels (80 boards) placed in the 16 crates; • • Tender is started in December 03 and is finished on 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; A 3009 board with 12 ch. , 2 -8, V - 9 A, 45 W, 5 boards/crate Tender at CERN 04; Full system available in Dec 05; Installation and commissioning 06. 06/03/2021 Pigi Paolucci, I. N. F. N. of Naples 9

DCS status overview II I. N. F. N. Naples • 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 subdetectors. 06/03/2021 Pigi Paolucci, I. N. F. N. of Naples 10

DCS connection Schema I. N. F. N. Naples SY 1527 20 Bus lines Control Room HV distrib 12 Bus lines HV EASY LV + Temp LB crate Detector 300 Optical fibers @ 1. 6 Gbit/s LV + Temp LB crate 06/03/2021 LV + Temp LB crate Pigi Paolucci, I. N. F. N. of Naples LV + Temp LB crate 11

Temperature sensor I. N. F. N. Naples Our goal is to measure the iron gap temperature with a precision of 1 o. C in order to: 1. 2. 3. 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 AD 592 BN transducer, after having tested different sensors. 06/03/2021 AD 592 temperature transducer • High Pre-calibrated Accuracy: 0. 5 o. C max @ +25 o. C • Excellent Linearity: 0. 158 C max (0 o. C to +70 o. C) • Wide Operating Temperature Range: – 25 o. C to +105 o. C • Single Supply Operation: +4 V to +30 V • Excellent Repeatability and Stability • High Level Output: 1 m. A/K • Two Terminal Monolithic IC: Temperature In/Current Out • Minimal Self-Heating Errors Pigi Paolucci, I. N. F. N. of Naples 12

Front End Board I I. N. F. N. Naples The front end electronic boards communicate with the Link Board through the I 2 C 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/10 s/LB/plot. 06/03/2021 Pigi Paolucci, I. N. F. N. of Naples 13

Front End Board II I. N. F. N. Naples • 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/10 s = 100 Bytes/s. • The I 2 C 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). 06/03/2021 Pigi Paolucci, I. N. F. N. of Naples 14

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

DCS Cost estimation I. N. F. N. Naples Temperature: T Sensors 300 * 4 € Chamber cable 0. 6 Km * 0. 5 €/m ADC cable 8 Km * 0. 5 €/m ADC cable inst 8 Km * 3 €/m Cham Connect. 300 * 0. 4 € ADC Connect. 600 * 0. 4 € ADC boards 10 * 2000 € 1. 2 K€; 0. 3 K €; 4. 0 K €; 24 K€; 0. 12 K €; 0. 24 K €; 20 K€; ~ 50 K € 30 K€; 0. 7 K€; 18 K€; ~ 49 K € FEB – I 2 C: I 2 C cable 6 Km * 5 €/m I 2 C connector 780 * 2 * 0. 4€ I 2 C cable inst. 6 Km * 3 €/m 06/03/2021 Total of ~ Pigi 110 K€I. N. F. N. (10 of. KE for infrastructure) Paolucci, Naples 16

Conclusions I. N. F. N. Naples • 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 300 temperature sensors (AD 592 BN) 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. A full time student from Naples is 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. 06/03/2021 Pigi Paolucci, I. N. F. N. of Naples 17