1

UA9 telescope first ideas

Rome – 12/3/2010

Mark Raymond – m.raymond@imperial.ac.uk

2

APV

inner barrel sensor12

96

CMS FED (9U VME)

CMS LHC Si strip readout system

APV25 0.25 m CMOS FE chipAPV outputs analog samples @ 20 Ms/sAPVMUX multiplexes 2 APVs onto 1 line @ 40 MHzLaser Driver modulates laser current to drive

optical link @ 40 Ms/s / fibreO/E conversion on FED and digitization

@ ~ 9 bits (effective)

APVMUX

laserdriver

lasers

analogoptical

receivers

~100manalog

opto-hybrid

analogue readout

x15,000

3

8.1 mm

7.1m

m

pipeline

128x192

128

x p

ream

p/sh

aper

AP

SP

+ 1

28:1

MU

X

pipe logicbias gen.

CAL FIF

O controllogic

APV25

Peak Decon.

128 channel chip for AC coupled sensors

slow 50 nsec. CR-RC front end amplifier

192 cell deep pipeline (allows up to 4 sec latency+ locations to buffer data awaiting readout)

peak/deconvolution pipeline readout modespeak mode -> 1 sample -> normal CR-RC pulse shapedeconvolution -> 3 consecutive samples combined to give single bunch crossing resolution

noisenoise270 + 38 e/pF (peak)270 + 38 e/pF (peak)

430 + 61 e/pF (deconvolution)430 + 61 e/pF (deconvolution)

note: only discrete 25nsec samples of above shapes are availablein asynch. test beam choose timing to get close to top of peak mode pulse shape

4

APV readout

FED

readoutanalog opto-link

digital header

128 analogue samples

APV O/P Frame

20 Ms/s readout -> 7 s

no zero-suppression (sparsification) on detector

pedestal, CM subtraction and zero suppression on FEDraw data also available for setup, performance monitoringand fault diagnosis

can read out raw data at low rate – VME - < 1 kHz

can read out sparsified data faster – VME ~ 10 kHz (to be verified – some uncertainty here)

Slink faster – 100 kHz – but needs incorporation (andcustomized use) of other CMS components (probably not possible this year)

VME ~ 10 MB/s

Slink to CMS DAQ

trigger

APV provides a timeslice of information from all 128 input channelsfollowing external trigger (trigger must be timed-in correctly)

5

opto-electric conversion

10 bit 40 MHz digitization

pedestal and CM subtraction

hit finding (sparsification)

formatting and transmission of dataup to higher DAQ level

check of APV synchronization

all tracker synchronous, so all pipeline addresses of all APVs should be the same

FED checks received APV pipe address matches with expected value (APV logic emulated at trigger level)

off-detector FED functionality

9U VME

6

PA

APV

inner barrel sensor

12 96

CMS FED (9U VME)

UA9 telescope readout system

APVMUX

laserdriver

lasers ~100m

analogopto-hybrid

make use of most componentsbut different sensors – no PAreadout fibre ribbons plug straight into FED

7

peltier

heatsink

fan

HV, LVI2C, RSTCk/T1

AO

H

Al support plate with cutout beneath sensor

D0 sensor60 um pitch (+ intermediate strip)

~ 8 um resolution

ceramic hybridceramic piece(same thickness as hybrid)

telescope sensor module

8

HV, LVI2C, RSTCk/T1

AO

H

sensor

HV

, LVI 2C

, RS

TC

k/T1

AOH

sensor

interface circuitryoptical fibre adaptors

power supply conditioningpeltier cooling control

…..

power

slow control

fast control (40 MHz ck, trigger)

fibre ribbonreadout

XY plane

crossoverarea ~ 4 x 4 cm2

9

250 mm

250 mm

~50 mm

baseplate(dimensions not critical)

adjustable feet for levelling

XY plane box(light tight)

10

XYplane

XYplane

XYplane

XYplane

few 10’s m~ m ~ m

FE

D

TT

Cex

TT

Cvi

VI2

C

Seq

Si

crat

e co

ntro

ller

9U/6U VME

I2C: 1 bus per planeactively split inside plane modulealso opto-isolated

Ck/T1: 1 shielded pair per planeCK/T1 combination at VME end(separate module)

1 fibre ribbon (50% utilised) per plane

note: will need triggerto initiate APV readout(who will provide?)

LV/HV powersupplies notincluded here

11

software

first thoughts - not my area of expertise

will need:

setuplots of programmable parameters in CMS readout systembias levels, modes of operation, timing offsets (synchronize to beam trigger), …

run controlwell behaved start/stoplook after data storage, format?

prompt data analysis “online” (provide feedback to setup)beam profile, signal amplitude histos, ….

offlinewhat is required?

12

I2C link

bufferopto-

isolateI2C

de-mux

levelshift

VI2C buffer

levelshift

1st APV/opto hybrid

2nd APV/opto hybrid

ancilliary I2C circuits

~ 10’s m

within front end XY plane enclosure

VME(1 channel)

separate VMEbuffer module

(4 chan – can also incorporateCk/T1 opto-buffering)

Ck/T1 link

SeqSi

5V 5V 5V 5V 2.5V2.5V

Ck/T1combine

Ck

T1opto-buffer

~ 10’s mopto-receiver

1st APV/opto hybrid2nd APV/opto hybrid

opto-buffer opto-receiver1st APV/opto hybrid2nd APV/opto hybrid

opto-buffer opto-receiver1st APV/opto hybrid2nd APV/opto hybrid

opto-buffer opto-receiver1st APV/opto hybrid2nd APV/opto hybrid

fibre-optic

levelshift

resets

13

up to 2 m

80 mm

50 mm

Optical rail system

X48 system from www.newport.com

assume this will sit on stable table (provided by someone else)feet allow some adjustment for levellingwill still need some other mechanism for overall height