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Low Voltage Power Low Voltage Power Supplies for ALICESupplies for ALICE

ALICE week June 04ALICE week June 04L.JirdenL.Jirden

Detector requirements Target Devices Procurement Actions

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Detector Detector requirementsrequirements

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

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Spec:Spec:Electrical Electrical

CharacteristicsCharacteristics DC Output

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

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Spec:Spec:Mechanical Mechanical

CharacteristicsCharacteristicsTYPICAL RACK LAYOUT

4U

1U

max 6U

1U

max 6U

VENTILATOR & CONTR.

HEAT EXCHANGER

LV PS

LV PS

HEAT EXCHANGER

LV PS

FRONT VIEW

LV PS

LV PS

SPACE

FOR

CABLES

600 mm300 mm

SIDE VIEW

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Spec:Spec:Monitoring & ControlMonitoring & Control

LVPS 1LOCAL 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 1LOCAL PANEL

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Spec: MONITORING AND Spec: MONITORING AND CONTROL FUNCTIONSCONTROL FUNCTIONS

VOLTAGES MON CON Individual channels ESS

CURRENTS MON 12 bit resolution ESS

RAMPING RATE MON CON Individual channels DES

TEMPERATURE MON Sensor above power circuits

ESS

OVER-CURRENT TRIP OFF VALUE

MON CON Individual channels ESS

FAN STATUS MON Out of limit warning ESS

OVER-VOLTAGE STATUS MON Individual channels DES

OVER-CURRENT STATUS MON Individual channels ESS

OVER-TEMP MON Out of limit warning ESS

MON = MONITOR

CON = CONTROL

ESS = ESSENTIAL

DES = DESIREDFUNCTIONS/PARAM

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Spec: MONITORING AND Spec: MONITORING AND CONTROL FUNCTIONSCONTROL FUNCTIONS

DC TRIP OFF MON Individual channelsGlobal DC power

ESSESS

RESET DC TRIP OFF CON Individual channelsGlobal DC power

ESSESS

DC POWER ON/OFF MON CON Individual channelsGlobal DC power

ESSESS

AC POWER ON/OFF MON CON using external power DES

PS HEALTH MON Summary status DES

LOCAL CONTROL MON Remote control locked out ESS

PS RESET CON System reset (tbs)?? ESS

MON = MONITOR

CON = CONTROL

ESS = ESSENTIAL

DES = DESIREDFUNCTIONS/PARAM

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VOLTAGES CON Groups of channels DES

DC POWER ON/OFF CON Groups of channels DES

RAMPING RATE MON CON Groups of channels DES

OVER-CURRENT TRIP OFF VALUE

MON CON Groups of channels ESS

MON = MONITOR

CON = CONTROL

ESS = ESSENTIAL

DES = DESIREDFUNCTIONS/PARAM

GROUP MANAGEMENT:THE POSSIBILITY TO CONFIGURE AND PERFORM FUNCTIONS ON GROUPS OF CHANNELS WITHIN A CRATE

Spec: MONITORING Spec: MONITORING AND CONTROL AND CONTROL

FUNCTIONSFUNCTIONS

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Spec: OPC SERVERSpec: 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

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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

Spec: OPC SERVERSpec: OPC SERVER

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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

Spec: OPC SERVERSpec: OPC SERVER

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Spec: cooling, etc.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)

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Spec: QA, Spec: QA, documentationdocumentation

Quality assurance Production tests

Functional tests Load tests

Documentation User’s guide Reference manual Test and calibration reports

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Target devicesTarget 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

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LVPS overview ILVPS overview IDetecto

rPS

chan [no]

Target device Module [A]

Crates [no]

When require

d

Common purchase

SPD 20 Wiener PL500 F8 50 4 4Q05 Yes?

or 240 Caen Easy 9 4

SDD 216 Arem Pro 6 6 4Q05 ?

SSD 448 Caen SY1527 or 3.6 5 ? ?

or Arem Pro

TPC 72 Wiener PL500 F8 115 22 4Q05 yes

or 72 Wiener Marathon 50 22

TRD 180 Wiener PL500 F8 115 45 3Q05 yes

TOF ? Caen Sasy ? ? ? no

HMPID 100 Wiener PL500 F8 30 14 3Q05 Yes, commit before 05

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LVPS overview IILVPS overview IIDetecto

rPS

chan [no]

Target device Module [A]

Crates [no]

When require

d

Common purchase

PHOS &CPV

11 Wiener PL500 F8 20 - 115

5 ? yes

FMD ? ? ? ? ? ?

T0 4 Caen Easy ? 1 ? yes

V0 ? Caen Easy ? 1 ? ?

PMD ? Wiener PL500 F8 ? ? ? yes

ZDC ? ? ? ? ? ?

MTK 364 Wiener PL500 F12 25 31 2Q05 yes

MTG 16 Wiener PL500 F8 115 2 4Q04 yes

TOTAL 1461 + ?

3 manufacturers -7 types

3.6 - 250

136 + ?

4Q04- 4Q05

9 yes; 5 ?; 1 no

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ProcurementProcurement

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, HMPID 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, FMD, V0, ZDC

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Action summaryAction 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 August 04

Radiation policy: TC mid August 04

Issue the tender Merge ALICE requirements with other experiments

and send out tender TC + ESS group early September