svt upgrade
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SVT upgrade
• SVT upgrade:
a)E’ parte dei DAQ upgrades per
aumentare “Trigger bandwidths”
b)Tracce SVX only per migliorare il
trigger di leptone inclusivo
• DAQ upgrades a CDF: 6 M$
• Chi saremo – Schedule
AM 32kpat 128kpatRoad Warrior
Paola Giannetti – Gruppo I Lecce - 24 settembre 2003
SVT: Silicon Vertex TriggerXFT + SVX 4/4 (fino a
6/2003)
XFT + SVX 4/5, more efficient
Instead of XFT: 1<<1.5
e 1<<2.5
New Functionalities: + SVX 4/5, 11.5e + SVX 4/5,
12.5
XFT tracksSVX hits
L2 Accept rate (Hz)
L3 Accept rate
15 kHz (L2 proc. Time)
350 Hz (L3-EVB)
70-80 Hz (L3-CSL)
I limiti ai rate dei tre livelli di trigger
L1 Accept rate (Hz)
Dead Time5%
Time (sec)
Time (sec)
TDC (2132 k$)EVB (680 k$)L3 (631 k$)upgrade
CSL (?k$)
Offline (1M$)
upgrade
XFT (2227 k$)L2 (429 k$)SRC (Done)SVT (? K$)upgrade
Accurate deadtime model (ModSim) to understand DAQ upgrades
Dead
Tim
e
L1A rate (kHz)
M. Schmidt
4/4
4/4 – 4/5 4/4 – 4/5
20 kHz
25 kHz
35 kHz5%
1. Two SRCs in parallel
2. L2 processor upgrade
3. 87 bit SVX digit.
4. -3 s in SVT proc.time
5. cut SVT tails above 27 sec
BUT the recent use of 4/5 in SVT changes the conditions!
1. match piu’ debole 2. Ghost roads3. 5 layers: Pattern +
larghi
27 sec
Time (s)
WHY 4/5? Signal Yields with 4/5
4/4
4/5
Marco Rescigno CSL review 6/23/03
1430
970
J/psi
D0
D0
Signal Yields in 4/5
Several studies:• D0 peaks in RUN 164303 (4/4) and
164304 (4/5) (Rolf)• EXPRESS_JPSI stream for 4/5
runs with svtsim emulation of 4/4 to get directly the yield increase of J/psi with both legs an SVT track
• BGEN MC with realistic simulation of BsDs
• Increase in signal yield match almost exactly the increase in L3 yield:
S/B unchanged
source 4/4 4/5 R
D0 yield 11.2 (nb)
17.5 (nb)
1.55 ±0.06
J/psi yield 663 974 1.5
Bs MC(Pt_b>5.5; |_b|<1.3)
1.59 ±0.05
Bs MC after offline reconstruction (Ivan F.)
1.58
Marco Rescigno CSL review 6/23/03
GAIN 50-60 %
Tempi di processamento: come agisce l’upgrade ?
Ricetta per velocizzare il tempo di esecuzione di SVT:
1. pattern piu’ sottili (AM grande) meno fits.
2. Road Warrior per rimuovere i ghosts
Hit Finders
Merger
Associative Memory
Hit Buffer
Track Fitter
to Level 2
COT tracks
fromXTRP
12 fibers
hits
roads
hits
x 12 phi sectors
Sequencerraw data fromSVX front end
NUOVA AM piu’ grande
Road Warrior
Annovi/Belforte
4/5 – upgraded 4/5 – 4/4
4/5 – 128kp – RW – All
XFT
svx
Detector Ghosts
Gli upgrade riportano la distribuzione deitempi del 4/5 su quelladel 4/4 !
4/5
SVT ha recentemente attivato il 4/5.Complessita’ e tempo di esecuzione sono aumentati.
ROAD WARRIOR e AM ++ riportano il tempo di esecuzione a quello del 4/4 !
L1_TWO_TRK_PT2
B physicsL1_TWO_TRK2_&_TWO_CJET5 Zbb
SVTconfiguration # of fits # of fits
32 kpatt 4/4 3.9 9.4
32 kpat 4/5 (now) 39.1 94
32 kpat 4/5 + RW 17.6 42
128 kpat 4/5 + RW 9.3 23
Detector ghost 4.3 14.5
0
2
4
6
8
10
12
14
16
18
20
0 10 20 30 40 50
L1A rate (kHz)
To
tal D
ead
Tim
e
RUN 168640
4/4L2UP-L2A 300Hz
4/4L2UP-L2A 300Hz
4/4NOUP-L2A 140 Hz
4/4NOUP-L2A 300 Hz
Accurate deadtime model (ModSim)
Ini_lum=32*1030
Ini_lum= 17.5 *1030
Ini_lum=22*1030
3
17kHz
4/5+SVTupgrade 4/4
4/4
4/5 nowIni_lum=44*1030
4/5+SVTupgrade+L2upgrade
16
M. Schmidt
Trigger di muoni in avanti (Annovi - Catastini – Cerri)
1<<1.25 (FRONT) L1 ora:
BMU*BSU(F)*XFT11
rate 8-16Hz @ 4E31
L2: RateLimited @ 0.7 Hz
1.25<<1.5 (REAR) L1 ora:
BMU*BSU(R)*TSU
Rate 200-400Hz @ 4E31
L2: RateLimited @ 1.3 Hz
TSU
BMU
1.25<<1.5 BSU(R)
1<<1.25 BSU(F)
Usiamo SVT*BMU*BSU per un unico trigger, senza bias in ! Goal reiezione ~ 20-50.•leptoni pronti di alto Pt solo 30kpatterns 95% efficiente per Pt>8 GeV e d0<500m (ottima efficienza fino a 4 GeV). Implementiamo il 4/5.
SVX
STUDIO del NUOVO TRIGGER
Selection # eventi
Z0
# eventi
L1_BMU_REAR
L1_MU 250 4678
match <2.5º
Pt>4 & 2<10
132 362
+ match 126 213
Efficiency L2 sel. 0.50Rejection L2 sel. 22
• Qualita’ delle tracce SVX only: studio su dati e MC
• Efficienza selezione L2: studio tagli su dati Z0
• Regezione del fondo: studio su dati selezionati da L1 ora
SVT: 2<10; |MC0 – SVT0|< 0.015
Pt/Pt2=0.095
=0.008
QUALITA’ delle tracce SVX only? Limit: = 0.002, Pt/Pt2 = 0.07
L1_MU data: offline vs SVT
SVT 2<10; |offl0 – SVT0|<0.015
60% 60%60%
effic. effic. Pt effic,
match match Pt match
J/Psi: MC vs SVT
=0.007 Pt/Pt2=0.08M
C-
SV
T
MC
Pt-
SV
TP
t
MC
CR
V-S
VTC
RV
c(SVT)- c(offl)
(SVT)- (offl)
Scegliamo il trigger di livello 2: quali tagli?
Z0-> data : Pt>4 & 2<10
Pt>4 & 2<10+|BMU–0 SVT|< 5O
0 offl vs BMU 0 SVT vs BMU
5o
BMU–0 offl
BMU–0 SVT
CUT
Z0 eff ~ 50% BMU–0 offl (best) BMU–0 SVT (best)
L1 MU dataPer stimare la reiezione
matchingcut
0 offl vs BMU 0 SVT vs BMUBMU–0 offl (best) BMU–0 SVT (best)
Reiezione fondo ~ 22
Conclusioni
• L’upgrade di SVT permettera’ un raddoppio della banda passante di L1 ed e’ parte fondamentale del DAQ upgrade.
• L’uso di tracce SVX only permette un trigger inclusivo di muoni in avanti e di abbassare le soglie di trigger per gli elettroni nel plug.
Pisa:Annovi dottorando (100%)Bardi ingegnere - art. 23 (100%)Dell’Orso prof. Associato (100%)Giannetti dirigente di ricerca (100%)Spinella assegnista INFN (50%)Ferrara:Damiani assegnista (10%)Sartori assegnista (50%)Tripiccione prof. Ordinario (10%)Cotta tecnologo (10%)Chiozzi tecnico (20%)
“A Standard Cell based Content-Addressable Memory System for Pattern Recognition” A. Cisternino et al., CERN/LHCC/98-36
TEMPI DI REALIZZAZIONE• Nuova AM-board: inizio estate 2004 (Pisa) durante estate 2004: test con FPGA (Pisa)• Progetto prototipo AM-chip: luglio 2004 (Ferrara-Pisa)
consegna chip ~2 mesi – disponibile ad ottobre.• Nuova LAMB: montare nuovo AM-chip a ottobre 2004 (Pisa)• test del chip + scheda: ottobre – dicembre 2004 (Pisa-Ferrara)• produzione: inizio 2005 (Pisa-Ferrara)• installazione: estate 2005 (Pisa-Ferrara)• Altri DAQ/Trigger upgrade: previsti nel 2006
RUN Multiprojects di Europractice: nel 2003 tuttii mesi eccetto luglio e Dicembrehttp://www.europractice.imec.be/europractice/
Road Warrior: fattibilita’ in Pulsar S. Belforte (~60 k$ Fermilab)messa in opera entro fine 2003 F. Spinella
SVTBackup slides
backup
slides
• ……………….• L1 accept rate of 30kHz appears to be achievable
– Two SRCs, 7-bit digitization– SVT improvements– L2 upgrade
• L2 peak rate limited by Event-builder– Current limit ~350 Hz– EVB group: 450 is possible- TDC improvements coming
• Will keep up at high luminosity
• Level 3 Limitations
– Input: CPU power …..
– Output: Logging Rate……
J. LewisCDF CSL Review23 June 2003
Il tempo morto (< 5%) genera limiti alla banda passante dei 3 livelli
Level 1 @Lum=40x1030 cm-2 sec-1
• Two Major Components– Calorimeter Triggers: Jets, electrons, photons, etc. ~4-5 kHz
In SVT: L1_JET10_&_ET90 (Higgs multijet)
L1_TWO_TRK2_&_TWO_CJET5 (Zbb)
L1_MET15_&_TWO_TRK2 (Higgs Z ~2 kHz L1_TWO_TRK10_DPHI20 (Di TAU exotic)
L1_EM8 (Gamma + bjet)L1_CEM4_PT4 (B electron)L1_CMUP6_PT4 (B muon)
– Hadronic B Decays: Two XFT tracks ~11-12 kHz • Using three classes of B triggers
– Scenario A• pT>2, pT,1+pT,2>5.5, opp. charge, <135DPS for safety only
– Scenario C• pT>2.5, pT,1+pT,2>6.5, opp. charge, <135DPS
– Low PT• pT>2, <90Heavy DPS, saturate bandwidth• Not considered for long-term
J. LewisCDF CSL Review23 June 2003
Level 1 Predictions
05
101520253035404550
0 10 20 30 40 50 60 70 80 90 100
Luminosity (e30)
Rat
e (k
Hz)
With baseline cuts, saturate bandwidth at ~7e31 if 30 kHz allowed @L1
0
50
100
150
200
250
300
350
400
450
500
0 10 20 30 40 50 60 70 80 90 100
Luminosity (e30)
Rat
e (H
z)
High-pt + Sc. C
High-pt + Sc. A
Level 2 Predictions
CSL Bandwidth: Aggressive
Trigger ModelTo stay below 21Mb/s
Some physics losses
0
2
4
6
8
10
12
14
16
18
20
0 10 20 30 40 50 60 70 80 90 100
Luminosity (e30)
Dat
a V
olum
e (M
b/s)
High-pt + Sc. C
High-pt + Sc. A
TDC (2132 k$)EVB (680 k$)L3 (631 k$)upgrade
CSL (?k$)
Offline (1M$)
upgrade
XFT (2227 k$)L2 (429 k$)SRC (Done)SVT (? K$)upgrade
J. LewisCDF CSL Review23 June 2003
Year chip boards devel. Total
2003? 120 kE10 kE (test b.) 5 kE 135 kE
2004 - 10 kE (protot.) 30 kE 40 kE
2005 53 kE 40 kE (produc.) 60 kE 153 k
Ferrara Pisa
Road Warrior e’ pagato da USA: sottratti i 35 kE corrispondenti nel 2005 (grazie
Stefano!)
Level 2 Operation• Approximate Timing Diagram
1 5SiliconSVX R/OISL R/OL00 R/OSVTLoad in a
CF, , track…Process in a
Process and Load
Setup Digitizer-phi
20 25
R/OR/O (16us Read-All)
r-z
SVT Processing
Unpack, Algorithms, TS Handshake
Time Since L1A (sec)30 35 40 4510 15
Ready to load next event
0
2
4
6
8
10
12
14
16
18
20 30 40 50 60 70 80
Inst. Lum. (10**30 sec-1 cm-2)
L1
A r
ate
(k
Hz) L1A rate (2.4)
L1A rate (2.87)
L1A rate (3.9)
L1A rate (4.15)
L1A rate (4.15)B
L1A rate (5.0)
L1A rate (3.5)
0
2
4
6
8
10
12
14
16
18
20 30 40 50 60 70 80
Ist. Lum. (10**30 sec-1 cm-2)
L1
A r
ate
(k
Hz) L1A rate (2.4)
L1A rate (2.87)
L1A rate (3.9)
L1A rate (4.15)
L1A rate (4.15)B
L1A rate (5.0)
L1A rate (3.5)
3D info from SVT
6 electrical barrels
Z
Due categorie di tracce SVT:1. (Dz=0) Tracce che entrano
escono dallo stesso barrel
2. Tracce che attraversano i barrel. Conosciamo il sengo di .
Una traccia SVT corrisponde ad una
traccia offline se Dz=0 oppure se Dz
ha lo stesso segno di .
Camere dei MU (BMU) + scintillatoriesterni (BSU)
T1< Thr.
T2< Thr.
L1 Trigger: (T1< Thr. OR T2< Thr.) AND BSU
BSU
Come migliorare il fattore di reiezione per il trigger di
Migliorabile con semplici accorgimenti aggiuntivi:
1. Uso dell’informazione di hadron timing
2. Riduzione della finestra temporale per gli scintillari BSU e TSU
3. Usare il beam constraint per il track fitter• Migliora la risoluzione in Pt• Riduce il numero delle tracce false
Z0 TRIGGER STUDY
5 GeV
0.8
0.9
0.7
0.9
Higgs bb (mass = 110 GeV)Z0 ha efficienze minori (mass = 90 GeV)
RUN IB MinimumBias events
Why 4/5 is more complex?5/5 4/5
This road share all hits with the 5/5. It’s a ghost.
NOW pattern recognition with 5 SVX layers uses larger patterns w.r.t. 4 SVX layers
More fake roads and more hits inside roads
Solution: More AM thinner patterns reduce fakes
Ghosts are 60-70% of 4/5 roads. Removing them speeds up 4/5 processing time.
These 3 roads share all hits. Two are ghosts.
4/5 4/5 4/5
Sorgenti di inefficienzaper da Z0
Ineff %
Silicon & clustering
15
wedge crossing
10
AM coverage 5
2 cut 5
Pt cut 7
, match 6
Tracking in 2 steps: find Roads, then find Tracks inside Roads
FullResolution Hits
use mostsignificant bits only
RoadRoad
Super Bin
Super Pattern
AM = BINGO PLAYERS
HIT # 1447
PATTERN NPATTERN 1PATTERN 2
PATTERN 3
PATTERN 5
PATTERN 4
• Dedicated device-maximum parallelism:• each pattern has its private hardware to compare with the event. • Roads search during detector readout
The Event...
The Pattern Bank
TRACKING WITH PATTERN MATCHING
The Associative Memory (AM)
Bingo scorecard
SVX only 2 distribution
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