trigger overview - hep.wisc.edu · trigger overview 1 doe/nsf review may 9, 2001. us cms doe/nsf...

US CMS DOE/NSF Review, May 8-10, 2001

Wesley Smith, U. Wisconsin CMS Trigger Project Manager

Trigger Overview Trigger Overview

1

DOE/NSF ReviewMay 9, 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

2


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

3


•

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

4


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

5


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

6


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

7

US

UStrig


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

8

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


Calorimeter Trigger GeometryCalorimeter Trigger Geometry

9

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

11

EB/124

25

26

η=3.0000η=2.6500η=2.5000η=2.3220

η=1.9300

TrackerEE/1

HE/1

HB/1


Calorimeter Trigger OverviewCalorimeter Trigger Overview

10

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)


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

11


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)

12

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)


Muon Trigger GeometryMuon Trigger Geometry

13

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


CSC Trigger Layout(WBS 3.1.1)

CSC Trigger Layout(WBS 3.1.1)

15

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

16


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

17


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

18

trigger overview - hep.wisc.edu · trigger overview 1 doe/nsf review may 9, 2001. us cms doe/nsf...

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