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US CMS DOE/NSF Review, May 8-10, 2001
Wesley Smith, U. Wisconsin CMS Trigger Project Manager
Trigger Overview Trigger Overview
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DOE/NSF ReviewMay 9, 2001
US CMS DOE/NSF Review, May 8-10, 2001
Collision rate 40 MHzLV1 Maximum trigger rate 100 kHzAverage event size ≈ 1 MbyteData production ≈ Tbyte/dayEvent Flow Control ≈ 106 Mssg/s
Detector Frontend
Computing Services
ReadoutSystems
FilterSystems
Event Manager Builder Networks
Level 1Trigger
RunControlSystem
I-O units bandwidth (512+512) 400 MByte/sBuilder network (512x512 port) ≥ 500 Gbit/s Event filter computing power ≈ 5 106 MIPSHigh Level Trigger acceptance 1 - 10 %Overall dead time ≤ 2%
TriDAS Main ParametersTriDAS Main Parameters
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US CMS DOE/NSF Review, May 8-10, 2001
TriDAS EvolutionTriDAS Evolution
Rates(kHz)
Level 1output
Readoutthruput
Ev. Bld.thruput
Ev. Filt.capacity
Design 100 100 100 100
Implement. 100 100 75 75*
Operation 75 75 75 75*
Plans for initial turnon of CMS:
* The final capacity will be determined by the evolution of technology, cost and financial resources
Plan set to exploit funding resources and computing technology advances in the most effective manner
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US CMS DOE/NSF Review, May 8-10, 2001
•
High trigger levels.Network and CPU farms- Clean particle signature- Finer granularity precise measurement- Kinematics. effective mass cuts & event topology- Track reconstruction and detector matching- Event reconstruction and analysis
Level-1. Specialized processors- Particle identification: high pT electron,
muon, jets, missing ET
- Local pattern recognition and energy evaluation on prompt macro-granular information from calorimeter and muon detectors
40 MHz
Up to 100 kHz
Detector Frontend
Computing Services
Event Manager Switch
Level 1Trigger
Detector Frontend
Computing Services
Event Manager Switch
Level 1Trigger
•
• •• ••
•
CMS Level 1 TriggerCMS Level 1 Trigger
≈ 100 Hz
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US CMS DOE/NSF Review, May 8-10, 2001
CMS Level 1 PipelineCMS Level 1 Pipeline
LV-1 Accept/Reject
Trigger Primitive Generator
Front-End Digitizer
Local level-1
Primitive e, γ, jets, µ
Pipeline delay ( ~ 3 µs)
~ 3 µs latency
loop
Synchronous 40 MHz digital system • 160 MHz internal pipeline• Readout & processing latency < 1µs• Signal distribution latency ~ 2 µs
Global LVL 1
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US CMS DOE/NSF Review, May 8-10, 2001
Trigger Electronics LocationsTrigger Electronics Locations In Underground Shielded Room:
• CSC/DT Muon Trigger Track Finder• RPC Muon Trigger Pattern Logic• Calorimeter Regional/Global Trigger• Global L1 Trigger
On Detector:• CSC/DT Segment Generation• RPC Muon Hit Generation• Calorimeter Digitization only
Electronics
Racks
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US CMS DOE/NSF Review, May 8-10, 2001
HFenergy
HCALenergy
ECALenergy
RPChits
DThits
CSChits
Regional.Cal. Trigger
PatternComp-arator
segment finder
segment finder
Global.Cal. Trigger
track finder
track finder
Global Muon Trigger
Global Trigger TTC SystemTRK,ECAL,HCAL,MU
quietregions
& mip bits
DAQ
trig.primi-tivedata
inputdata
triggerobjects
Level 1 Trigger OverviewLevel 1 Trigger Overview
3<|η|<5 |η|<3 |η|<3 |η|<2.1 .8<|η|<2.4 |η|<1.2
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US
UStrig
US CMS DOE/NSF Review, May 8-10, 2001
logicalunits
interconnectionsbtw. logical units
links btw. detector &control room(18 bx)
CMS Level 1 LatencyCMS Level 1 LatencyTracker
frontend
RPC DT CSC CALO
detector
CALOtrigger
global trigger
clk/control
local clk/control
RPCPACT
link to detector~ 18 bx
linklin
k
85 bx
=>28 bx
127 bx
5 bx5bx
frontend frontend frontend frontend
DTTPG
CSCTPG
CALOTPG
TRACKFINDERS
DT
global muon trigger79 bx
74 bx
78 bx
link
link
91 bx
99 bx
77 bx
CSC
81 bx
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Target is 128 bunch crossings =3.2 µs
• set by tracker & preshower
• > 30 crossing safety after redesign in .25µ
Number shown are latency budgets
• Units are bunch crossings
• Include contingency
Reviewed once/year
US CMS DOE/NSF Review, May 8-10, 2001
Calorimeter Trigger GeometryCalorimeter Trigger Geometry
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η=2.1720η=2.0430
η=1.8300η=1.7400η=1.6530η=1.5660η=1.4790
η=1.
3920
η=1.
3050
η=1.
2180
η=1.
1310
η=1.
0440
η=0.
9570
η=0.
8700
η=0.
7830
η=0.
6090
η=0.
6950
η=0.
5220
η=0.
4350
η=0.
3480
η=0.
2610
η=0.
1740
η=0.
0870
η=0.
0000
Scale
(meters)
0 1.00.5
4.33
2 m
5.68
0 m
2.93
5 m
3.90
0 m
1.290 m
1.811 m
2.900 m 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19
20
21
22
23
27
28
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EB/124
25
26
η=3.0000η=2.6500η=2.5000η=2.3220
η=1.9300
TrackerEE/1
HE/1
HB/1
US CMS DOE/NSF Review, May 8-10, 2001
Calorimeter Trigger OverviewCalorimeter Trigger Overview
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CalorimeterRegionalTrigger
ReceiverElectron Isolation
Jet/Summary
Calorimeter Electronics
Interface
Global Trigger Processor
Muon Global TriggerIso Mu MinIon Tag
Cal. Global TriggerSorting, E
tMiss, ΣE
t
MinIon Tag foreach 4φ x 4η region
Copper 40 MHz Parallel4 Highest E
t
isolated & non-isol. e/γ4 Highest τ & std. jetsE
x, E
y from each crate
Et sums
Lumi-nosityMonitor
4K 1.2 Gbaud serial links w/2 x (8 bits E/H/FCAL Energy+ fine grain structure bit)+ 5 bits error detection codeper 25 ns crossing
US CMS Trigger:U. WisconsinUS CMS HCAL:
FNAL/Maryland
CMS ECAL:Lisbon/Palaiseau
US CMS HCAL:U. Nebraska
UK CMS: Bristol
CMS:Vienna
72 φ x 60 η H/ECALTowers (.087φ x.087η for η < 2.2 &.174-195η, η > 2.2)FCAL:2x(12 φ x 12 η)
US CMS DOE/NSF Review, May 8-10, 2001
RO
C
..
.TDC TDC TDC TDC
OEB
SLB
...
Syn
c
TX
EC
AL T
PG
Op
tical
transm
itter
Trigger
link
Trig
ger
EC
AL
Syn
c
TX
EC
AL T
PG
Op
tical
transm
itter
Trigger
link
Trig
ger
EC
AL
Syn
c
TX
EC
AL T
PG
Op
tical
transm
itter
Trigger
link
Trig
ger
EC
AL
Syn
c
TX
EC
AL T
PG
Op
tical
transm
itter
Syn
c
TX
EC
AL T
PG
Op
tical
transm
itter
BR
OC
Control
Trigger
link
Readout
link
Control
link
Trigger
link
Trig
ger
Trig
ger
EC
AL
EC
AL
CALORIMETER READOUT/TRIGGER CRATES
Calorimeter Data
Trigger Links
Data Links (25 Mbyte/s av.)Channel Link
TTC Optical Link (CLK, BC0, L1A)DCC
Data Links (20 Mbyte/s av.)Trigger Data
Trigger Data
TRIGGER READOUT CRATE
Detector Optical Links
VME backplane (control)
OEB
SLB
ROSE100
CPU
Data Links (15 Mbyte/s av.)Channel Link
REGIONAL TRIGGER CRATES
x 50
Control network
Data Links (200 Mbyte/s av.) to DAQ
Trigger Data
Trigger Links
Links to Global Trigger
x 19
GLOBAL CAL TRIGGER CRATE
Control network
DCC
Cal. Trig. & Readout LayoutCal. Trig. & Readout Layout
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US CMS DOE/NSF Review, May 8-10, 2001
Regional Calorimeter CrateRegional Calorimeter Crate(WBS 3.1.2)
Data from calorimeter FE on Cu links @ 1.2 Gbaud (ptyp. tstd.)
• Into 133 rear-mounted Receiver Cards (ptyp. tstd. w/ ASICs)
160 MHz point to point backplane (ptyp. tstd.)
• 19 Clock&Control (ptyp. tstd.), 133 Electron ID (ptyp. tstd.)
19 Jet/Summary, Receiver Cards operate @ 160 MHz
Electron Identification Card(WBS 3.1.2.9)
Backplane(WBS 3.1.2.6)
Receiver Card(WBS 3.1.2.8)
VME
ROC
CEM
EI EI EI EI EI EI EI EIJSLTTC
Jet Summary Card(WBS 3.1.2.10)
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19 X
Clock/Control(WBS 3.1.2.7)
Monitor(WBS 3.1.2.13)
DAQ Proc.(WBS 3.1.2.12)
Crate(WBS 3.1.2.5)
Power Supplies(WBS 3.1.2.4)
Test Facilities(WBS 3.1.2.3)
Preprod. ASICs(WBS 3.1.2.2)
Prototypes(WBS 3.1.2.1)
US CMS DOE/NSF Review, May 8-10, 2001
Muon Trigger GeometryMuon Trigger Geometry
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0
100
200
300
400
500
600
700
800
0 200 400 600 800 1000 1200Z (cm)
R (
cm)
RPC CSCDrift Tubes
US CMS DOE/NSF Review, May 8-10, 2001 14
RPChits
CSChits
DThits
PAtternComparator
Trigger
≤≤≤≤4 barrel +≤≤≤≤4 endcap
muon candidates(pt, η, φ, quality)
local trigger
track segments((((φφφφ, , , , δδδδφφφφ, , , , ηηηη, , , , δδδδηηηη))))
local trigger
track segments((((φφφφ, , , , δδδδφφφφ, , , , ηηηη, , , , δδδδηηηη))))
regional triggerEndcap Track Finder
≤≤≤≤4 muon candidates(pt, η, φ, quality)
Global Muon Trigger
≤≤≤≤4 muons(pt, η, φ, quality)
regional triggerBarrel Track Finder
≤≤≤≤4 muon candidates(pt, η, φ, quality)
Muon Trigger OverviewMuon Trigger Overview
US
US CMS DOE/NSF Review, May 8-10, 2001
CSC Trigger Layout(WBS 3.1.1)
CSC Trigger Layout(WBS 3.1.1)
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Trigger Mother Boards (Rice) in 8 Iron Disk Peripheral Crates
5 Muon Port Cards x 12
Backplane, Crate Interconnects
24 Optical Links x 12
UCLA
Florida
6 Track FinderCrates in CountingRoom (total). Sortoutput (Rice) to Global Muon Trigger (Vienna)UCLA Barrel Barrel
x 6 = 360°x 2 Ends= x 12
Rice
Rice
EMU
EMU
Trigger
Trigger
TriggerCrate:4 SR,CCC2 SP-CSC2 SP-OVR
2 x
1 µ/2 links
WBS 3.1.1.1
WBS 3.1.1.2 WBS 3.1.1.2
WBS 3.1.1.3
WBS 3.1.1.4Clock & Control
Card
Rice
60° Sector Layout (x12 Sectors)
EMUTrigger
+<° +<° +<° +<° +<° +<°
)<° )<° )<°
+<° +<° +<° +<° +<° +<°
)<° )<° )<°
+<° +<° +<° +<° +<° +<°
+<° +<° +<° +<° +<° +<°
+<° +<° +<° +<° +<° +<°
0@+,&
+<° +<°+<°+<° +<°+<°
0@+,+
0@+,)
0@+,H
0@),)
0@),+
0@&,)
0@&,+
0@+%I$(8 0@+%J2#;8
03'?!'485"4A
03'?!'485"4A
03'?!'485"4A
03'?!'485"4A
)<°6$78'4
)<°6$78'4 *<° 6$78'4 *<°%6$78'4
6$78'4J$7$2K$4
6$78'4J$7$2K$4
5656$78'4
!4'7$99'4
LMJ6$78'4
!4'7$99'4
)<°6$78'40@+%5$?8$4
+Nµ
03'?!'485"4A
+*µ+*µ +*µ +Nµ
)µ)µ)µ &µ&µ
*µ *µ
O"44$D O"44$D
US CMS DOE/NSF Review: May 8-10, 2001
U. S. Trigger Organization U. S. Trigger OrganizationW. Smith,Wisconsin
CMS Trig. PMLevel 2
Manager
J. Hauser,UCLA
Level 3 Manager
Muon Trigger
S. DasuWisconsin
Level 3 Manager
Calor.Trigger
P. PadleyRice
Port CardsClock &Control
R. CousinsUCLA
Sector Receiver
D. AcostaU. Florida
Sector Processor
J. LackeyWisconsin
Engineer-ing
P. ChumneyWisconsin
Testing,Simulation
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US CMS DOE/NSF Review, May 8-10, 2001
Trigger Status & PlansTrigger Status & Plans
Calorimeter Trigger• Serial Link tests successful
• 2nd proto being made -> integration tests this year• Produce & test next generation prototype boards
• New boards made, being made or in design now• All prototype ASICs made & tested by Vitesse
• Will test on next generation prototypes Muon Trigger
• Successful Integration test of all prototype boards• Muon Port Card, Sector Receiver, Sector Processor,
Backplane, Crate, Clock Board, Optical links• Evolution to Compact, Faster Design
• Successful tests of new backplane, optical links, FPGA• Next generation prototypes to follow
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US CMS DOE/NSF Review, May 8-10, 2001
Trigger PresentationsTrigger Presentations
8:30 - 11:15 AM, WH3NE (Theory conference room)
CMS Trigger Design & Status W. Smith 8:30 - 8:45
Cal. Trig. Overview & Simulation P. Chumney 8:45 - 9:15
Cal. Trig. Status & Plans S. Dasu 9:15 - 9:45
Muon Trig. Overview J. Hauser 9:45 - 9:55
Muon Trig. Simulation D. Acosta 9:55 - 10:15
Muon Trig. Test Results/ Hardware Status & Plans P. Padley 10:15 - 10:45 BREAK: 10:30 - 10:45 AM
Trigger Cost & Schedule: Status W. Smith 10:45 - 11:15
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