1. 1 Low Voltage Power Supplies for ALICE TB 26.7.04 L.Jirden u Recall: u target devices & possible solutions u Outstanding actions

2. 2 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

3. 3 Wiener Marathon system UX CR PFC AC/DC Digital control Power modules 230 VAC CANbus Water cooling B-tol: 300 gauss Rad tol: ? DC/DC Analog control Power modules 230 VAC CANbus PFC AC/DC Digital control 380 VDC B-shield B-tol: 1200 gauss Rad tolerant

4. 4 UX CR Caen Easy system no cooling 230 VAC CANbus Power supply 48 VDC DC/DC Digital control Digital control Digital control SY1527 main- frame ethernet Branch controller EASY: B-tol: 1000 gauss : Rad tol B-tol: 50 gauss Rad tol: ? SASY: B-tol: 5000 gauss : Rad tol

5. 5 UX CR Arem Pro PS 230 VACRS232 AC/DC power AC/DC power AC/DC power module control module control crate control ethernet B-tol: ? gauss Rad tol: ? no cooling

6. 6 LVPS – possible solutions I DetectorPS chan [n o ] Target deviceModule [A] Crates [n o ] When required Common purchase SPD20Wiener Marathon5044Q05Yes? or240 Caen Easy94 SDD216Arem Pro ??664Q05? SSD448Caen SY1527 ??3.65?? TPC72Wiener Marathon50224Q05yes TRD180Wiener Marathon50?45?3Q05yes TOF?Caen Sasy???no HMPID100Wiener Marathon30?14?3Q05Yes, commit before 05

7. 7 LVPS possible solutions II DetectorPS chan [n o ] Target deviceModule [A] Crates [n o ] When required Common purchase PHOS & CPV 11Wiener Marathon20 – 115? 5??yes FMD?????? T04Caen Easy?1?yes V0?Caen Easy?1?? PMD?Wiener Marathon???yes ZDC?????? MTK364Wiener Marathon25?31?2Q05yes MTG16Wiener Marathon115?2?4Q04yes TOTAL1461 + ? 3 manufacturers - 5 types 3.6 - 250 136 + ? 4Q04- 4Q05 9 yes; 5 ?; 1 no

8. 8 Outstanding actions u Send out market survey: end June u done u Finalize ALICE requirements: before mid August u Electrical characteristics: as drafted unless protests u Suggested size of modules: 10A, 30A, 50A, with possibility to operate modules in parallel to at least 250A u control functions: u Remote voltage control: ? u Grouping: yes (if not too expensive) u Remote power on/off: yes (if not too expensive) u Radiation policy: TC 30 August 04 u Issue the tender: early September u Finalize technical spec: u Merge ALICE requirements with other experiments u Final draft to detectors end August for ok u Send out tender

9. 9

10. 10 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

11. 11 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

12. 12 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

13. 13 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

14. 14 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

15. 15 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

16. 16 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

17. 17 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

18. 18 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

19. 19 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

20. 20 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)

21. 21 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