cms trigger j. erö, m. fierro, a. jeitler, n. neumeister, p. porth, h. rohringer, l. rurua, h....

CMS TRIGGERCMS TRIGGERJ. Erö, M. Fierro, A. Jeitler, N. Neumeister, P. Porth, H.

Rohringer, L. Rurua, H. Sakulin, A. Taurok, C.-E. Wulz;

H. Bergauer, C. Deldicque, K. Kastner, M. Padrta (Techniker);

L. Boldizsar (temporär)

VorstandssitzungWien, 29. April 2002

Claudia-Elisabeth Wulz 2 Vorstandssitzung, April 2002

Triggeraktivitäten

• Globaler Trigger• Globaler Müontrigger• Regionaler Müontrigger (DTTF und )• Trigger Control System • Softwareentwicklung ORCA• Triggerstudien • Arbeiten in PRS Müongruppe• Apr. 2002: CPT Week


Board Layout of the Global Trigger Processor

PSB (Pipeline Synchronizing Buffer) Input synchronization (7 boards including GMT) GTL (Global Trigger Logic) Logic calculation (1-2 boards)FDL (Final Decision Logic) L1A decision (1 board)TCS (Trigger Control System Module) Trigger Control (1 board)NEW: L1A (Level-1 Accept Module) Delivery of L1A (1 board)TIM (Timing Board) Timing (1 board)GTFE (Global Trigger Frontend) Readout (1 board)

FromDetector

To TTC

Backplane andReadout links

PSB GTL FDL TCS L1A

ToDAQ

GTFE

FromTTC

TIM

FromPartitions

ToEVM

A. Taurok, C.-E. WulzM. Padrta, H. Bergauer, K. Kastner


New layout of Global Trigger 9U Crate


Main Global Trigger Rack


GTL-6U

• GTL-6U

Automatic chip design and setup procedure developed. Layout for a 20 channel GTL (4 , 4 isol. e/, 4 central jets, 4 fwd jets, ET, ET

miss, 8 jet multiplicities; other quadruplets can be connected alternatively for tests) is currently being finished. 1020-pin Altera FPGA 20k400E not yet included.

The layout of a conversion board to be used later in final 9U-crate is ready. It contains also memories in FPGA’s to send simulated test data to the GTL-6U board.

A decision on a possible redefinition of jet input groups has been taken. It was decided to keep the present best 4 central jets, 4 forward jets and 4 -jets and jet multiplicities for different ET thresholds. A new quantity HT giving the transverse energy sum of all good jets above threshold has been added. The exact definition of how to calculate the jet multiplicities (-range) still has to be taken at the level of the calorimeter trigger. More than 8 values could be necessary.


GTL-9U

New: HT


GTL-6U Prototype Schematics

Design simplified,board available by Oct. 2002


FDL-9U

Schematic and chip design in progress. Board available by Oct. 2002.

Monitoring of all algorithm and L1A bits

Prescaling of all algorithms

Trigger Mask

8 L1A’s in parallel for partition modes

Input of up to 64 technical trigger bits from PSB possible


TIM-6U

• TIM-6U: The board contains a TTCrx chip and provides all timing signals for the GT crate. It will also be used in the Drift Tube Track Finder crates.

An FPGA provides all necessary test functions to run the crate without the central TTC clock. It simulates also L1A requests for monitoring or to test the readout chain.

The schematic design is finished. The layout is on hold until May 2002 due to TTCrx jitter problems. We would prefer to keep the TTCrx as a mezzanine board with interconnections identical to current board.

The final Timing Board will be 6U (previously 9U).


TIM-6U


TCS-9U

• TCS-9U: The main functions are defined but the design is still open for additional requests (calibration logic etc.). The board is expected by Oct. 2002.Trigger Partitions: The maximum number of subsystems is fixed (32).A preliminary agreement about the output to the DAQ Event Manager has been reached.The input format of Fast Signals is now fixed. 4 coded bits per subsystem, sent as LVDS parallel data, and RJ45 connectors are proposed. The TCS board provides data for the new ”CMS-TTCvi”. A L1A driver module to be used with the CMS-TTCvi has been conceived.


TCS-9U environment


Global Trigger Milestones 2002

Milestone March 2002: System Test -> Delayed to Oct. 2002

This includes the backplane, the PSB-6U, GTL-6U, FDL-9U and TIM-6U. The GTFE and the GMT are not included.

Milestone July 2002: TCS-6U tested -> Delayed to Oct. 2002

Milestone Oct. 2002: Backplane-9U tested -> OK


Global Trigger Milestones beyond 2002

Milestone June 2003: Complete GT prototype availableIntegration tests possible from this date.• GTFE-9U: Conceptual design of readout board done.

Milestone July 2004: 12-channel PSB-9U available• PSB-9U: Conceptual design done. Will have memories inside FPGA’s.

Milestone Nov. 2004: Complete GT availableIncludes GTL-9U module with all input channels (4 , 4 isol. e/, 4 non-isol. e/ , 12 jet channels, HT , ET, ET

miss, jet multiplicities). The Global Muon Trigger will have been completed by Nov. 2003.


Barrel-Endcap Overlap Region

Notwendig für hohe Effizienz: Verwendung von MB2/1 Segmenten im CSC TFVerwendung von ME1/3 Segmenten im DT TF

Ghosting (Duplikation) entsteht, wenn … DT und CSC Trigger das selbe Muon finden dasselbe Muon einmal im Barrel (z.B. DT) und einmal im Endcap (z.B. forward-RPC) gefunden wirdproblematisch für Di-Muon-Trigger

Szenarien zur Verhinderung von Duplikation wurden untersuchtAuf Ebene der DT und CSC Trigger Track Finder

• Optimierung der Zuordnung von Segmenten in ME1/3 zu DT und CSC Trigger• Cancel-Out Schema mit 1 Tag-Bit pro CSC-Segment in ME1/3• Cancel-Out Schema mit 1 Tag Bit pro DT-Segment in MB2/1

Auf Ebene des Global Muon Triggers• Bestätigung von DT/CSC Muonen durch RPC• DT/CSC Cancel-Out Hardware Unit

MB2/1

ME

1/3

H. Sakulin


Effizienz und Ghosts mit verschiedenen Szenarien

DT/CSC Cancel-Out Hardware Unit im Global Muon Trigger ist notwendig– inkludiert in GMT Hardwaredesign– inkludiert in ORCA-Simulation

CMS Internal Notes– CMS Internal Note 2002/024, H. Sakulin, “A Robust Solution to the Ghosting

Problems of the CMS L1 Trigger in the Barrel/Endcap Overlap Region”– CMS Internal Note (in preparation), D. Acosta et al., “Specification of the Interface

between DT and CSC Level-1 Track Finders”

(*) Effizienz und Ghosts in der Overlap Region 0.9 < || < 1.2

Barrel-Endcap Overlap Region

0.42 %92.5 %GMT: Cancel Out Hardware Unit

0.04 %88.3 %GMT: Bestätigung durch RPC

2.22 %91.7 %Cancel-Out nur auf Track-Finder Level(bestes Szenario)

Ghosts (*)Effizienz (*)Szenario


Neue Methode zur Behandlung von Pile - up in der Simulation

pt1

pt4

pt10

CMSIM

CMSIM

CMSIM

oohitfzdigi

PU

oohitfz

oohitfz

trig

ORCA jobs

grosses Sample von Bunch Crossings

modifiziertes ORCA:einzelne Interaktionen werden ueberlagert

Interaktionen mit Muonen,bins in muon-pT

MIX

Pile-Up ohne Muonen

Überlagerung von verschiedenen Interaktionen (mit Muonen) im selbenBunch Crossing wird korrekt simuliert

Am besten möglich in der ORCA-DigitalisierungModifikation von ORCA erforderlich

Soll für 2002 Muon-Monte-Carlo-Produktion verwendet werden

CMS Internal Note (in Vorbereitung): H. Sakulin:, “Obtaining single- and di-muon trigger rates from monte-carlo samples”


Drift Tube Trigger Track Finder

DTTF-Sektorprozessorkarte - wurde mit der ganzen Funktionalität simuliert (Input Receiver Module inbegriffen)

- vollständig in Behavioral VHDL- generell funktionell mit Chip-VHDL-Modellen

- Schaltung wurde entwickelt und zur Layout-Entwicklung an CERN weitergeschickt- Bauteile bestellt- Automatische Erzeugung der Lookup-Tables (M. Fierro)

Track Finder- VHDL Modell weiterentwickelt und die Verknüpfungen ausgebaut- Testbench mit Ein- und Ausgangsmodulen ergänzt, welche getestet wurden- Board-level Funktionalitätstests mit VHDL Modell durchgeführt (Synchronisationsprobleme nicht vollständig beseitigt)

Interface-Fragen gelöst ...- Interface zwischen lokaler Triggerelektronik für (Padova/Bologna)- Interface zwischen lokaler Triggerelektronik für (Bologna)

J. Erö, Ch. Deldicque


Track Finder Software

• Implementierung des Track Finders in ORCA• Entwicklung von stand-alone Software zur Erzeungung der Look-up Tables• Erzeugung von neuen Look-up Tables

N. Neumeister


DTTF-Prototypenentwicklung

Hardware - Backplane wurde entwickelt, Layout in Wien gemacht- 9U Crate entspechend der CERN-Spezifikation gekauft- neue Eingangskarten entsprechend den DTTF Karten entwickelt und gebaut- neue, mit breiteren Datensätzen funktionierende Ausgangskarten entwickelt, Schaltung fertig, Layout-Entwicklung folgt bald

Vorbereitung für baldigen Test - Testsystem-PC für VME ausgetauscht, Programme neu installiert- neue Programmversionen eingesetzt und alte Karten getestet- Logikanalysator gekauft- Untersuchung von verschiedenen Methoden zur Entwicklung von Prototypen- Testsoftware

Milestone März 2002: DTTF-Prototyp getestet -> Neu: Jan. 2003


DTTF Test Setup


Karten für Test Setup

J. Erö, Ch. Deldicque


Global Trigger ORCA Simulation

• The L1 Global Trigger System is simulated by an ORCA package (starting from ORCA version 5)– Trigger/L1GlobalTrigger

• Hardware system features are simulated – …except Delta conditions (topological correlations among different

classes of trigger objects) and new HT/jet counts

• Persistency of trigger objects is provided

• Official documentation is available on the usual ORCA Software description pages

M. Fierro


Implementing an algorithm: syntax

• Each algorithm is made up of particle blocks of different kind:

– MU, EL, IE, CJ, FJ, TJ, ET, EM, JN

• Each block is numbered to have a one-to-one connection with its own condition settings (up to 64 different blocks per particle can be set):

– MU_00, EL_01, FJ_01, EM_63,...

• An algorithm is a combination of particle blocks, connected by .AND. ( & ), .OR. (|) conditions:

MU_00&EM_00 | EL_00&EM_00


Implementing an algorithm: syntax

User can provide algorithms in three different ways:– Use the default implemented algorithms– Write a file named trigger_menu.dat

• One algorithm per line• Blank line allowed• This overrides the default Trigger Menu algorithms

– Add one algorithm to the default• Via adding a line in the .orcarc file

L1GlobalTrigger:Algorithm MU_00&EM_00|EL_00&EM_00


Implementing an algorithm: thresholds

For each particle block, user must provide a list of conditions by the WriteThreshold utility

• It is an interactive tool that writes a file for each specified block

• Users are asked for which block they want to provide conditions and then they are asked to specify the conditions themselves

• User can modify conditions for the default implemented algorithms

• If WriteThreshold is not invoked for a certain block, the conditions for that specific block are set to the default values (now defaults are set to “don’t care” values)


L1GlobalTrigger output

• The output of L1GT is the Level 1 Trigger Accept word, a string of 128 bits. Each bit corresponds to the output of one algorithm.

• User can select whether to check the overall L1 accept “signal” or a specific algorithm bit


Persistency

• The information for each trigger object is saved per event, in form of BitArray– 24 bit for each muon candidate

• typedef BitArray(24) MuonDataWord

– 32 bit for each calorimeter object (req. from L1Calo Group)• Actually in the code only 21 bit words are used, following the hardware specifications

• typedef BitArray(21) CaloDataWord

• L1Accept word is saved as well• BitArray(128)


Persistency

• User code can access the particle information via L1GlobalTrigger methods:– CaloDataWord getElectrons(int i) – MuonDataWord getMuons(int i)

• Methods are provided to ‘convert’ BitArray information into usual particle parameters (ET, pT, ,…)

• The L1GlobalTrigger code itself can run on the database, updating it according to whether the user modified particle conditions/algorithm definitions


L1 GT Efficiency Studies for some Physics Channels

• The samples for 4 channels have been:• generated with PYTHIA 6.136 (1000 events per channel)

• simulated with CMSIM121

• Hit-formatted and digitized with ORCA_5_3_2• Pile-up for high luminosity has been added

• The samples have then been processed with L1GlobalTrigger

• The thresholds for calculation of efficiencies of individual algorithms are taken as for calculation of muon, calo and combined rates by M. Fierro and P. Chumney for 4 different DAQ scenarios: 75 kHz, 50 kHz, 37.5 kHz, 25 kHz.

L. Boldizsar, A. Jeitler, N. Neumeister, P. Porth, L. Rurua, H. Rohringer, C.-E. Wulz


Samples used for current analysis

H250: HSM WW ll (leptonic decay) MH = 250 GeV/c2

HSM WW ljj (semileptonic decay)H800: HSM WW ll (leptonic decay) MH = 800 GeV/c2 HSM WW ljj (semileptonic decay)

SUSY1:

l + Et miss. + jets

TTH150:

l +Et miss. + jets + -jet

2

211~

2~

/117

/)~(864),~

(792),~(650

/934

0 cGeVM

cGeVubtM

cGeVM

h

Lq

g

=

=

=

tt → (H+b)(W−b )→ (τ+νb)(l−νb )

Production: ˜ g ̃ g , ˜ g ̃ q , ˜ q ̃ q

Decays: ˜ g → ˜ q q

˜ q → ˜ χ 2

0q→ h0 ˜ χ 1

0q→ bb ̃ χ 1

0q

˜ q → ˜ χ 1

+ ′ q → ˜ χ 1

0W+ ′ q → ˜ χ 1

0lν ′ q


SUSY1 lepton + ET miss + jets

Efficiencies are calculated for 4 different DAQ bandwidth scenarios: 75kHz, 50kHz, 37.5kHz, 25kHz

1. Algo single muon 27.48, 25.48, 22.87, 22.072. Algo di-muon 12.34, 12.34, 13.24, 12.343. Algo muon-ieg 13.54, 13.14, 11.63, 10.934. Algo muon-tau-jet 24.77, 23.87, 21.36, 19.365. Algo muon-any-jet 40.82, 38.62, 34.90, 32.506. Algo muon-et_total 41.42, 39.21, 35.51, 33.107. Algo muon-et_miss 40.12, 37.91, 34.30, 31.99 8. Algo single ieg 12.84, 12.84, 12.84, 11.949. Algo di-ieg 4.01, 4.01, 4.01, 1.6010.Algo single tau-jet 51.05, 51.05, 48.75, 39.7211.Algo di-tau-jet 20.86, 16.95, 18.45, 16.9512.Algo single jet 96.79, 96.79, 94.28, 94.2813.Algo double jet 89.67, 89.67, 84.95, 84.9514.Algo triple jet 66.50, 63.39, 63.39, 63.3915.Algo quad jet 50.35, 34.50, 34.50, 34.5016.Algo ieg-any jet 30.99, 19.26, 19.26, 19.2617.Algo ieg-tau jet 20.06, 13.24, 12.74, 12.2418.Algo et_miss 87.56, 87.56, 87.56, 87.5619.Algo ieg-et_miss 30.39, 15.04, 15.04, 15.0420.Algo any jet-et_miss 96.29, 93.18, 93.18, 93.1821.Algo et_total 83.75, 83.75, 83.75, 83.75

Total efficiency: 99.8, 99.7, 99.4, 99.2%


l +ETmiss + jets + -jet

Efficiencies are calculated for 4 different DAQbandwidth scenarios: 75kHz, 50kHz, 37.5kHz, 25kHz 1. Algo single muon 26.9, 25.6, 22.9, 22.12. Algo di-muon 6.8, 6.8, 7.4, 6.83. Algo muon-ieg 12.7, 11.9, 10.9, 10.14. Algo muon-tau-jet 19.7, 18.9, 17.8, 14.55. Algo muon-any-jet 16.2, 15.4, 14.7, 13.86. Algo muon-et_total 19.1, 18.0, 16.8, 15.57. Algo muon-et_miss 21.9, 21.2, 20.2, 19.1 8. Algo single ieg 21.6, 21.6, 21.6, 19.09. Algo di-ieg 5.5, 5.5, 5.5, 1.810.Algo single tau-jet 46.1, 46.1, 41.2, 24.811.Algo di-tau-jet 17.2, 10.5, 12.5, 10.512.Algo single jet 33.2, 33.2, 19.7, 19.713.Algo double jet 17.4, 17.4, 9.9, 9.914.Algo triple jet 8.6, 6.7, 6.7, 6.715.Algo quad jet 7.6, 2.0, 2.0, 2.016.Algo ieg-any jet 20.9, 16.3, 16.3, 16.317.Algo ieg-tau jet 29.1, 23.1, 20.1, 18.218.Algo et_miss 14.4, 14.4, 14.4, 14.419.Algo ieg-et_miss 23.6, 15.1, 15.1, 15.120.Algo any jet-et_miss 52.7, 27.3, 27.3, 27.321.Algo et_total 3.0, 3.0, 3.0, 3.0

Total efficiency: 86.5, 79.9, 76.6, 70.8%

tt → (H+b)(W−b )→ (τ+νb)(l−νb )


Sleptons +- + ET miss + no jets

This channel has been generated and processed with ORCA_6_0_1

The efficiencies for best 3 algorithms for 4 different DAQ scenarios are:

single muon 96.3%, 96.0%, 95.6%, 95.2%di-muon 74.0%, 74.0%, 74.8%, 74.0%muon-ETmiss 14.2%, 14.2%, 14.2%, 14.2%

TOTAL EFFICIENCY 96.8%, 96.6%, 96.4%, 96.3%

l± -> 10 l±~ ~


HLT-Simulation und Müonrekonstruktion Simulation + Rekonstruktion:

Detaillierte Detektorsimulation Präzise Simulation (auf Bit-Level) der Triggerelektronik

des Level-1 Müonrekonstruktion und -selektion (High Level Trigger) Level-2: verwendet nur Müonkammern

(Stand-alone Rekonstruktion) Level-3: inkludiert Trackerinformation

(benützt also Müonkammern, Kalorimeter und Tracker) Aktivitäten:

Berechnung von Triggerraten (Level-1, Level-2, Level-3) Effizienzstudien für interessante Signale (Higgs, SUSY, etc.) Bereitstellung von realistischen “Triggermenüs” für

niedrige und hohe Luminositäten• Kombination von Schwellen, Raten und Effizienzen


Müonimpulsauflösung im Trigger

Level-1Level-1 Level-2Level-2 Level-3Level-3

Auflösung in 1/pT

1/ pT

gemessen−1/ pT

generiert

1/ pT

generiert N. NeumeisterL3-Algorithmus für hoheLuminosität in Arbeit


Müonraten

Für eine Schwelle von 20 GeV/c:• Rate hauptsächlich von (b/c) (~100 Hz)• W/Z-Rate: 15 Hz für pT > 20 GeV/c


L1/L2/L3-Müonraten

Mit der Auflösung des Level-3: Rate kommt ~ von prompten Müonen


DAQ Output

• Auszug aus Triggermenü mit Schwellen für 2x1033cm-2s-1

5 Hz40*252

3 Hz801

24 Hz221

6 Hz12*82

4Hz93/75*751/2

<10 HzOthers

80 HzTotal

1 Hz17*172e

27 Hz281e

Rate ( )Cut GeVChannel


Neuer Zeitplan für CMS

CMS Zone geschlossen: 1. April 2007CMS Physikdatennahme: Ende Aug. 2007


Zusammenfassung

Globaler Trigger - Hardware

PSB-6U und Backplane-6U fertig

Layout der GTL-6U-Karte in Arbeit, Konversionskarte für 9U-Crate fertig

Timing Modul entworfen, Layout verzögert

L1A Driver Board: Design fertig

FDL Modul und Backplane-9U erwartet im Okt. 2002

Design des TCS-Systems adaptiert, TCS Modul erwartet im Okt. 2002

Crate und Rack Layout geändert GT und TF Software in ORCA 6 eingebaut

Effizienzstudien für bestimmte Kanäle durchgeführt

Overlap Region: Studien abgeschlossen

GMT: FPGA Design kann beginnen

DTTF: Prototyp bald fertig

L1-Softwarekoordination

HLT: Triggermenü, Müonrekonstruktion

cms trigger j. erö, m. fierro, a. jeitler, n. neumeister, p. porth, h. rohringer, l. rurua, h....

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