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

Report
Low Voltage Power
Supplies for ALICE
ALICE week June 04
L.Jirden
 Detector
requirements
 Target Devices
 Procurement
 Actions
1
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
2
Spec:
Electrical Characteristics
 DC Output
 Modular design; 2 – 7 V, 4 – 250 A modules
LVPS
2 – 7 V, 4A
24h stability < 5mV or 0.1%
6m stability < 20mV or 0.5%
Noise & ripple < 10mV p to p
LVPS
2 – 7 V, 250A
3
Spec:
Mechanical Characteristics
TYPICAL RACK LAYOUT
FRONT VIEW
4U
VENTILATOR & CONTR.
1U
HEAT EXCHANGER
max 6U
LV PS
max 6U
LV PS
1U
SIDE VIEW
300 mm
SPACE
FOR
CABLES
600 mm
LV PS
LV PS
HEAT EXCHANGER
LV PS
4
Spec:
Monitoring & Control
Two options:
a) Via CANbus
b) Via Ethernet
Ethernet
PC
OPC Server
PCI “Kvaser”
Provided by
manufacturer
PC
OPC Server
CANbus
LOCAL
PANEL
LOCAL
PANEL
LVPS 1
External interlock
LVPS 1
5
Spec: MONITORING AND
CONTROL FUNCTIONS
MON = MONITOR
ESS = ESSENTIAL
FUNCTIONS/PARAM
CON = CONTROL
DES = DESIRED
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 MON CON
VALUE
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
6
Spec: MONITORING AND
CONTROL FUNCTIONS
MON = MONITOR
ESS = ESSENTIAL
FUNCTIONS/PARAM
CON = CONTROL
DES = DESIRED
DC TRIP OFF
MON
RESET DC TRIP OFF
Individual channels
Global DC power
ESS
ESS
CON Individual channels
Global DC power
ESS
ESS
DC POWER ON/OFF
MON
CON Individual channels
Global DC power
ESS
ESS
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
7
Spec: MONITORING AND
CONTROL FUNCTIONS
GROUP MANAGEMENT:
THE POSSIBILITY TO CONFIGURE AND
PERFORM FUNCTIONS ON GROUPS OF
CHANNELS WITHIN A CRATE
FUNCTIONS/PARAM
MON = MONITOR
ESS = ESSENTIAL
CON = CONTROL
DES = DESIRED
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
8
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
9
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
10
Spec: OPC SERVER
 Performance
 Change in Device to OPC:



max
max
Device cache to OPC client:
max
Write from OPC to device:
max
Interlock to start ramp-down: max
10 sec at full bus load
1 sec for a single PS
3 sec for all parameters
1 sec
5 ms
11
Spec: cooling, etc.

Cooling




Environment



Total dose: 10 mGy
up to 200 Gauss
Fluency: 109 n/cm2
Halogen free material
Safety regulations


Radiation
Magnetic Field
Construction


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
CE certification
Reliability

MTBF > 90 000 hours (excluding ventilators)
12
Spec: QA, documentation

Quality assurance


Production tests
 Functional tests
 Load tests
Documentation



User’s guide
Reference manual
Test and calibration reports
13
Target devices
 Wiener

PL500 F8:

PL500 F12:

Marathon:
product exists; water cooling; some control
limitations
prototype exists; might not be
commercialized
Prototype exists; should replace F8, F12
 Caen




SY1527:
Easy
Sasy
product exist; no water cooling
prototype exist; B-field tolerant
prototype exist; high B-field tolerant
Arem Pro

Device
H/W prototype exists; no water cooling
14
LVPS overview I
Detector PS chan
[no]
SPD
20
or
240
SDD
216
SSD
448
or
Target device
Wiener PL500 F8
Module Crates When
[A]
[no]
required
50
4
9
4
Arem Pro
6
Caen SY1527 or
Caen Easy
Common
purchase
4Q05
Yes?
6
4Q05
?
3.6
5
?
?
4Q05
yes
Arem Pro
TPC
72
Wiener PL500 F8
115
22
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
15
LVPS overview II
Detector PS chan
[no]
Target device
Module Crates When
[A]
[no] required
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 +
?
4Q044Q05
9 yes; 5 ?;
1 no
16
Procurement

Individual:



Common:







TOF
Handled by the detector – non-CERN purchasing
Recommended to use the common technical specification – at
least for the remote control
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
17
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 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
18

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