alice dcs workshop 28/29 may 2001 vito manzari, infn bari ssd (silicon strip detector) sdd (silicon...

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


• 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


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


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


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


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


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 ExperimentALICE Experiment


The NA57 slow control system (CAEN SY527)


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


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


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


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


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)


Example of remote monitoring

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


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


Solution based on Voltage Regulators


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


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

alice dcs workshop 28/29 may 2001 vito manzari, infn bari ssd (silicon strip detector) sdd (silicon...

Documents

detector bias power

pit caen sy1527 analog

mall power supplies

analog power cable caen

analog power cables

detector bias ground

pit distance

analog electronics