ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari SSD (Silicon Strip Detector) SDD (Silicon Drift Detector) SPD (Silicon Pixel Detector) Detector.

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

SSD (Silicon Strip Detector)

SDD (Silicon Drift Detector)

SPD (Silicon Pixel Detector)

Detector Control System for theSilicon Pixel Detector

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

• 2 layers splitted in 10 sectors• each sector carries on 6 staves:

4 outer layer + 2 inner layer• each stave splitted in 2 half-stave

half-stave basic module

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

SPD Basic Building Blocks

32 columns

256

row

s

Ladder 2: 70.72 mm Ladder 1: 70.72 mm

Half stave ~193 mm

425 m

50

m

Pixel Cell

Frontend chip

Pixel detector

Carrier bus

Power supply ~1m

1 data and 2 control links (~200m)

PCMCM

16.8

mm

15.8

6 m

m

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

Electronics System Block Diagram

G-link serializer& optics

opt. link

L1, L2y, L2n, testpulse, jtag

pixel pilot

pix

el

ch

ip 0

pix

el

ch

ip 9

link receiver

pixel converter

busy, jtag

pilot MCM control roompixelbus

pixel transmit

pixelcontrol transmit

opt. links

pixelcontrol receive

pixel chips

pixel router

A. KLuge 25.1.01

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

Services

• Cooling

• LV power requirements– LV currents each half stave (@ V ≈ 1.6V nominal)

– I analog ≈ 4A, I digital ≈ 3A

– Conductor (Cu)• width: 2 mm strip on kapton, thickness ≈ 0.20mm ≈ 1.4% X0

• resistance ≈ 40 mOhm

– Regulation and filtering of power supplies (space/cooling constraints !)• rad-hard linear regulator chip (P. Jarron) at patch-panels

• filtering with passive components on bus

• Fibre-optic links• 3 (possibly 4) fibres each half-stave

• single fibre diameter (tight jacket) ≈ 0.9mm, fibre ribbon pitch = 0.25mm

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

Overview of voltage and current requirements per half-stave• Base unit: 1 half-stave = 10 pixel chips

• SPD (Silicon Pixel Detector) => 120 half-staves

• Separate analog, digital, detector bias, MCM power supplies

• Necessary channels: - 120 analog power + ground + sense wires- 120 digital power + ground + sense wires- 120 detector bias + ground- 120 MCM power + ground + sense wires

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

Possible solutionsPossible solutions

• All power supplies outside the pit distance from detectors => 200 m

• Power supplies for analog electronics inside the pit distance from detectors => 40 - 50 m

Power supplies for digital electronics and detector bias outside the pit distance from detectors => 200 m

• All power supplies inside the pit distance from detectors => 40 - 50 m

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

ALICE ExperimentALICE Experiment

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

The NA57 slow control system (CAEN SY527)

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

All power supplies outside the pit (distance from detector => 200 m)

- easy to replace the damaged board during the run (not on-board spare channels)

- no radiation and magnetic field problems

- increased length and cross section of the analog power cables

- voltage drop on the analog power cable CAEN SY1527 (for all power supplies) outside the pit

Shoebox with capacitive filter

200 m

4 - 5 m

SPD

analog power digital power detector bias

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

Analog power supplies inside the pit (distance from detector => 40–50 m); digital and detector bias power supplies outside the pit (distance from detector => 200 m)

- spare analog channels => necessary rele’ system

- no digital and bias spares

CAEN SY1527 (digital power and detector bias) outside the pit

CAEN SY1527 (analog power) inside the pit

Shoebox with capacitive filter and control logic

4 - 5 m

SPD

40 m

200 m

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

PIXEL

40-50 m

40-50 m

• Several cables under test

• Line impedance adjust: solution under study from CAEN to make use of sense wires or line impedence adjustment

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

Cost estimateCost estimate

1st solution (all PS outside)• 3 CAEN SY1527 mainframe + 9 A1532 (optional P.S.) 60 KChF

• 18 + 1 programmable board A1517B (5V/3.6A, 14 ch) 137 KChF

• 5 + 1 programmable board A1519B (250V/1mA, 28 ch) 48 KChF

• Cable for digital power (10.5 ChF/m) 42 KChF

• Cable for detector bias (5.53 ChF/m) 11 KChF

• Cable for analog power (10.5 ChF/m) 63 KChF

TOTAL 360 KChF

2nd solution (analog PS inside and digital PS outside)• 4 CAEN SY1527 + 12 A1532 80 KChF

• 19 + 3 programmable board A1517B (5V/3.6A, 14 ch) 159 KChF

• 4 + 1 programmable board A1519B (250V/1mA, 28 ch) 48 KChF

• Cable for digital power (10.5 ChF/m) 42 KChF

• Cable for detector bias (5.53 ChF/m) 11 KChF

• Cable for analog power (10.5 ChF/m) 10.5 KChF

TOTAL 350.5 KChF

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

Test System for CAEN SY1527

Test System available in Bari Lab:

• CAEN mainframe SY1527

• A1734N board (12 channels, 250 to 6KV, 7mA to 100 mA)

• Ethernet “TCP/IP”

• CAEN OPC server installed on pcal04

• OPC client via TCP/IP => under study

(first tests performed with an OPC client from National Instruments installed on pcal01)

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

Example of remote monitoring

This OPC client from National Instruments runs on a remote workstation (pcal01)

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

All power supplies inside the pit (distance from detector => 40-50 m)- reduction cost and length of the conventional analog power cables - reduced voltage drop on the analog power cable - no access during the run- impossible to replace damaged board, necessary spare channels for the analog-digital power supplies and detector bias => notable cost increase

• Alternative solution ---> Adoption of Voltage Regulators with standard

powerful power supply

• Power Supply: ELIND 30KL 38/80 autoranging (0-30 V, 0-80 A)

• Voltage regulator: L4913 (P. Jarron), others

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

Solution based on Voltage Regulators

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

Main parameters of the DCS for the ITS Pixel (1)

ALICE DCS Workshop 28/29 May 2001 Vito Manzari, INFN Bari

Main parameters of the DCS for the ITS Pixel (2)

N.B. All analog channels

System Location Controlleddevice

Numberof

channels

Parameters Type ofcontrol

20 Voltage R/WAnalog FE20 Current R20 Voltage R/WDigital FE20 Current R

Detecor bias 20 Voltage R/W

GeneralSupply PX24

Detector current 20 Current R120 Voltage R/WAnalog FE120 Current R120 Voltage R/WDigital FE120 Current R

Detecor bias 120 Voltage R/W

BarrelSupply Shoebox

Detector current 120 Current RPrimary pressure 1 Pressure RUX25

Primary temperature 1 Temperature RInlet pressure 30 Pressure R

Outlet pressure 30 Pressure RInlet temperature 60 Temperature R

CoolingBarrel

Outlet temperature 60 Temperature R