ua9 telescope first ideas rome – 12/3/2010 mark raymond – [email protected]
DESCRIPTION
UA9 telescope first ideas Rome – 12/3/2010 Mark Raymond – [email protected]. CMS LHC Si strip readout system. CMS FED (9U VME). APVMUX. APV. analog opto-hybrid. ~100m. lasers. inner barrel sensor. 96. 12. laser driver. x15,000. analog optical receivers. analogue readout. - PowerPoint PPT PresentationTRANSCRIPT
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
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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?
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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
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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