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

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 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 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 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 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 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 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 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 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 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 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 > hours (excluding ventilators)

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 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 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 F Q05yes or72Wiener Marathon5022 TRD180Wiener PL500 F Q05yes TOF?Caen Sasy???no HMPID100Wiener PL500 F830143Q05Yes, commit before 05

16 LVPS overview II DetectorPS chan [n o ] Target deviceModule [A] Crates [n o ] When required Common purchase PHOS & CPV 11Wiener PL500 F ?yes FMD?????? T04Caen Easy?1?yes V0?Caen Easy?1?? PMD?Wiener PL500 F8???yes ZDC?????? MTK364Wiener PL500 F Q05yes MTG16Wiener PL500 F811524Q04yes TOTAL ? 3 manufacturers - 7 types ? 4Q04- 4Q05 9 yes; 5 ?; 1 no

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 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