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Low Voltage Power Supplies for ALICE ALICE week June 04 L.Jirden

Low Voltage Power Supplies for ALICE ALICE week June 04 L.Jirden. Detector requirements Target Devices Procurement Actions. Detector requirements. Quantities ALICE total ~160 LVPS crates and ~2000 PS channels Draft technical specification (Spec) Electrical characteristics

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Low Voltage Power Supplies for ALICE ALICE week June 04 L.Jirden

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  1. Low Voltage Power Supplies for ALICEALICE week June 04L.Jirden • Detector requirements • Target Devices • Procurement • Actions

  2. Detector requirements • Quantities • ALICE total ~160 LVPS crates and ~2000 PS channels • Draft technical specification (Spec) • Electrical characteristics • Mechanical characteristics • Monitoring and control • Cooling • Environment • Standard chapters on: • construction, safety, reliability, quality assurance, documentation

  3. LVPS LVPS Spec:Electrical Characteristics • DC Output • Modular design; 2 – 7 V, 4 – 250 A modules 24h stability < 5mV or 0.1% 6m stability < 20mV or 0.5% Noise & ripple < 10mV p to p 2 – 7 V, 4A 2 – 7 V, 250A

  4. Spec:Mechanical Characteristics TYPICAL RACK LAYOUT FRONT VIEW SIDE VIEW VENTILATOR & CONTR. 300 mm 600 mm 4U 1U HEAT EXCHANGER LV PS LV PS SPACE FOR CABLES max 6U LV PS LV PS max 6U 1U HEAT EXCHANGER LV PS

  5. PC OPC Server LOCAL PANEL LOCAL PANEL LVPS 1 LVPS 1 Spec:Monitoring & Control Two options: a) Via CANbus b) Via Ethernet Ethernet PC OPC Server Provided by manufacturer PCI “Kvaser” CANbus External interlock

  6. MON = MONITOR CON = CONTROL ESS = ESSENTIAL DES = DESIRED FUNCTIONS/PARAM Spec: MONITORING AND CONTROL FUNCTIONS

  7. MON = MONITOR CON = CONTROL ESS = ESSENTIAL DES = DESIRED FUNCTIONS/PARAM Spec: MONITORING AND CONTROL FUNCTIONS

  8. MON = MONITOR CON = CONTROL ESS = ESSENTIAL DES = DESIRED FUNCTIONS/PARAM Spec: MONITORING AND CONTROL FUNCTIONS GROUP MANAGEMENT:THE POSSIBILITY TO CONFIGURE AND PERFORM FUNCTIONS ON GROUPS OF CHANNELS WITHIN A CRATE

  9. Spec: OPC SERVER • General • Compliance with OPC standards • No effect on PS output due to failure of remote control • Restart of OPC remotely • Not send set points automatically at startup – read from device • PS shall maintain its set points during PS power failure • Genuine device and cache access • Interactive list of device functions

  10. Spec: OPC SERVER • Maintenance • To support future versions of Windows and OPC standards • To support future versions of PS firmware • Configuration • Allow appropriate management of the fieldbus • Human readable configuration file (such as XML) • Obtain actual configuration by scanning • Setting of ranges for analog values and setting of the dead band

  11. Spec: OPC SERVER • Performance • Change in Device to OPC: max 10 sec at full bus load max 1 sec for a single PS • Device cache to OPC client: max 3 sec for all parameters • Write from OPC to device: max 1 sec • Interlock to start ramp-down: max 5 ms

  12. Spec: cooling, etc. • Cooling • Use of standard ventilators not possible due to stray magnetic fields • Water cooling recommended • Installed in rack with assured vertical airflow removing max 3kW/rack • Environment • Radiation Total dose: 10 mGy Fluency: 109 n/cm2 • Magnetic Field up to 200 Gauss • Construction • Halogen free material • Safety regulations • CE certification • Reliability • MTBF > 90 000 hours (excluding ventilators)

  13. Spec: QA, documentation • Quality assurance • Production tests • Functional tests • Load tests • Documentation • User’s guide • Reference manual • Test and calibration reports

  14. Target devices • Wiener • PL500 F8: product exists; water cooling; some control limitations • PL500 F12: prototype exists; might not be commercialized • Marathon: Prototype exists; should replace F8, F12 • Caen • SY1527: product exist; no water cooling • Easy prototype exist; B-field tolerant • Sasy prototype exist; high B-field tolerant • Arem Pro • Device H/W prototype exists; no water cooling

  15. LVPS overview I

  16. LVPS overview II

  17. Procurement • Individual: TOF • Handled by the detector – non-CERN purchasing • Recommended to use the common technical specification – at least for the remote control • Common: SPD, TPC, TRD, PMD, PHOS & CPV, T0, MTK, MTG • Handled by ESS group – CERN tendering • No FI committee required • Market Survey out end June • Tender out early September • Close mid October • Small quantities mid November to end 04 • Not decided or no answer: SDD, SSD, HMPID, FMD, V0, ZDC

  18. Action summary • Send out market survey • PH/ESS group by end June 04 • Finalize the requirements • Electrical characteristics, granularity of control (size and amount of modules), control functions: detectors before mid August04 • Radiation policy: TC mid August 04 • Issue the tender • Merge ALICE requirements with other experiments and send out tenderTC + ESS group early September

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