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

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

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

4. 4 Spec: Mechanical Characteristics TYPICAL RACK LAYOUT 4U 1U max 6U 1U max 6U VENTILATOR & CONTR. HEAT EXCHANGER LV PS HEAT EXCHANGER LV PS FRONT VIEW LV PS SPACE FOR CABLES 600 mm300 mm SIDE VIEW

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

6. 6 Spec: MONITORING AND CONTROL FUNCTIONS VOLTAGESMONCONIndividual channelsESS CURRENTSMON12 bit resolutionESS RAMPING RATEMONCONIndividual channelsDES TEMPERATUREMONSensor above power circuitsESS OVER-CURRENT TRIP OFF VALUE MONCONIndividual channelsESS FAN STATUSMONOut of limit warningESS OVER-VOLTAGE STATUSMONIndividual channelsDES OVER-CURRENT STATUSMONIndividual channelsESS OVER-TEMPMONOut of limit warningESS MON = MONITOR CON = CONTROL ESS = ESSENTIAL DES = DESIRED FUNCTIONS/PARAM

7. 7 Spec: MONITORING AND CONTROL FUNCTIONS DC TRIP OFFMONIndividual channels Global DC power ESS RESET DC TRIP OFFCONIndividual channels Global DC power ESS DC POWER ON/OFFMONCONIndividual channels Global DC power ESS AC POWER ON/OFFMONCONusing external powerDES PS HEALTHMONSummary statusDES LOCAL CONTROLMONRemote control locked outESS PS RESETCONSystem reset (tbs)??ESS MON = MONITOR CON = CONTROL ESS = ESSENTIAL DES = DESIRED FUNCTIONS/PARAM

8. 8 VOLTAGESCONGroups of channelsDES DC POWER ON/OFFCONGroups of channelsDES RAMPING RATEMONCONGroups of channelsDES OVER-CURRENT TRIP OFF VALUE MONCONGroups of channelsESS MON = MONITOR CON = CONTROL ESS = ESSENTIAL DES = DESIRED FUNCTIONS/PARAM GROUP MANAGEMENT: THE POSSIBILITY TO CONFIGURE AND PERFORM FUNCTIONS ON GROUPS OF CHANNELS WITHIN A CRATE Spec: MONITORING AND CONTROL FUNCTIONS

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

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

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

12. 12 Spec: cooling, etc. u Cooling u Use of standard ventilators not possible due to stray magnetic fields u Water cooling recommended u Installed in rack with assured vertical airflow removing max 3kW/rack u Environment u RadiationTotal dose: 10 mGyFluency: 10 9 n/cm 2 u Magnetic Fieldup to 200 Gauss u Construction u Halogen free material u Safety regulations u CE certification u Reliability u MTBF > 90 000 hours (excluding ventilators)

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

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

15. 15 LVPS overview I DetectorPS chan [n o ] Target deviceModule [A] Crates [n o ] When required Common purchase SPD20Wiener PL500 F85044Q05Yes? or240 Caen Easy94 SDD216Arem Pro664Q05? SSD448Caen SY1527 or3.65?? orArem Pro TPC72Wiener PL500 F8115224Q05yes or72Wiener Marathon5022 TRD180Wiener PL500 F8115453Q05yes TOF?Caen Sasy???no HMPID100Wiener PL500 F830143Q05Yes, commit before 05

16. 16 LVPS overview II DetectorPS chan [n o ] Target deviceModule [A] Crates [n o ] When required Common purchase PHOS & CPV 11Wiener PL500 F820 - 115 5?yes FMD?????? T04Caen Easy?1?yes V0?Caen Easy?1?? PMD?Wiener PL500 F8???yes ZDC?????? MTK364Wiener PL500 F1225312Q05yes MTG16Wiener PL500 F811524Q04yes TOTAL1461 + ? 3 manufacturers - 7 types 3.6 - 250 136 + ? 4Q04- 4Q05 9 yes; 5 ?; 1 no

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

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