cbm at fair walter f.j. müller, gsi, darmstadt for the cbm collaboration 5 th international...

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CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma, Kolkata, India, 8-12 February 2005 New challenges for Front-End Electronics, Data Acquisition and Trigger Systems

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Page 1: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

CBM at FAIR

Walter F.J. Müller, GSI, Darmstadtfor the CBM collaboration

5th International Conference on Physics andAstrophysics of Quark Gluon Plasma,

Kolkata, India, 8-12 February 2005

New challenges for Front-End Electronics, Data Acquisition and Trigger Systems

Page 2: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 2

Outline

CBM (a short reminder) observables setup

FEE/DAQ/Trigger requirements challenges strategies

Page 3: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 3

CBM Physics Topics and Observables In-medium modifications of hadrons

onset of chiral symmetry restoration at high ρB

measure: , , e+e-

open charm (D0, D±) Strangeness in matter

enhanced strangeness production measure: K, , , ,

Indications for deconfinement at high ρB

anomalous charmonium suppression ? measure: D0, D±

J/ e+e-

Critical point event-by-event fluctuations

measure: π, K

Good e/π separation

Low cross sections→ High interaction rates

Hadron identification

Vertex detector

Page 4: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 4

CBM Setup

Radiation hard Silicon pixel/strip detectors in a magnetic dipole field

Electron detectors: RICH & TRD & ECAL: pion suppression up to 105

Hadron identification: RPC, RICH

Measurement of photons, π0, η, and muons: ECAL

Page 5: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 5

Meson Production in central Au+Au

SIS100/ 300

W. Cassing, E. Bratkovskaya, A. Sibirtsev, Nucl. Phys. A 691 (2001) 745

10 MHz interaction rateneeded for 10-15 A GeV

Page 6: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 6

Open Charm Detection

Some hadronic decay modes

D0 (c = 124.4 m):D0 K-+ (3.9 0.09%)

D (c = 317 m):D+ K-++ (9 0.6%)

Au+Au @ 25 AGeV – D0 decays

Measure displaced vertexwith resolution of 100 μm

Page 7: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 7

A Typical Au+Au Collision

Central Au+Au collision at 25 AGeV:URQMD + GEANT4

160 p 170 n360 - 330 + 360 0 41 K+ 13 K- 42 K0

107 Au+Au interactions/sec (up to 109 ions/sec, 1%

target)

high particle flux and fluence in detectors

selective triggers needed

Page 8: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 8

Detector Requirements

Hit rates for 107 minimum bias Au+Au collisions at 25 AGeV:

Rates of > 10 kHz/cm2 in large part of detectors ! main thrust of our detector design studies typical detector element count rate: ~ 100 kHz

Page 9: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 9

Trigger Requirements In-medium modifications of hadrons

onset of chiral symmetry restoration at high ρB

measure: , , e+e-

open charm (D0, D±) Strangeness in matter

enhanced strangeness production measure: K, , , ,

Indications for deconfinement at high ρB

anomalous charmonium suppression ? measure: D0, D± -

J/ e+e Critical point

event-by-event fluctuations

measure: π, K

offline

assume archive rate:few GB/sec20 kevents/sec

offline

offline

trigger

trigger

trigger trigger on high pt e+ - e- pair

trigger ondisplaced vertex

drives FEE/DAQarchitecture

Page 10: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 10

CBM DAQ Requirements Profile

D and J/Ψ signal drives the rate capability requirements D signal drives FEE and DAQ/Trigger requirements

Problem similar to B detection, see BTeV, LHCb Adopted approach:

displaced vertex 'trigger' in first level, like in BTeV Additional Problem:

DC beam → interactions at random times

→ time stamps with ns precision needed

→ explicit event association needed Current design for FEE and DAQ/Trigger:

Self-triggered FEE Data-push architecture

Page 11: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 11

Conventional FEE-DAQ-Trigger Layout Detector

Cave

Shack

FEE

Buffer

L2 Trigger L1 Trigger

DAQ

L1 A

ccep

t

L0 Trigger

fbunch

Archive

Trigger

Primitives

Especially

instrumented

detectors

Dedicated

connections

Specialized

trigger

hardware

Limited

capacity

Limited

L1 trigger

latency

Modest

bandwidth

Standard

hardware

Page 12: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 12

Limits of Conventional Architecture

Decision time for first

level trigger limited.

typ. max. latency 4 μs for LHC

Only especially instrumented

detectors can contribute to

first level trigger

Large variety of very

specific trigger hardware

Not suitable for complex

global triggers like secondary

vertex search

Limits future trigger

development

High development cost

Page 13: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 13

L1 Trigger

Special

hardware

High

bandwidth

The way out .. use Data Push ArchitectureDetector

Cave

Shack

FEE

Buffer

L2 Trigger L1 Trigger

DAQ

L1 A

ccep

t

L0 Trigger

fbunch

Archive

Trigger

Primitives

Especially

instrumented

detectors

Dedicated

connections

Specialized

trigger

hardware

Limited

capacity

Limited

L1 trigger

latency

Modest

bandwidth

Standard

hardware

fclock

L2 Trigger

Timedistribution

Page 14: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 14

L1 Trigger

Special

hardware

High

bandwidth

The way out ... use Data Push ArchitectureDetector

Cave

Shack

FEE

DAQ

Archive

fclock

L2 Trigger

Page 15: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 15

L1 Select

Special

hardware

High

bandwidth

The way out ... use Data Push Architecture Detector

Cave

Shack

FEE

DAQ

Archive

fclock

L2 Select

Self-triggered front-end

Autonomous hit detection

No dedicated trigger connectivity

All detectors can contribute to L1

Large buffer depth available

System is throughput-limited

and not latency-limitedModular design:

Few multi-purpose rather

many special-purpose

modules

Page 16: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 16

Toward Multi-Purpose FEE Chain

PreAmpPreAmp preFilter

preFilter ADCADC Hit

Finder

Hit

Finderdigital

Filter

digital

FilterBackend

& Driver

Backend

& Driver

Pad GEM's PMT APD's

Anti-Aliasing

Filter

Sample rate:

10-100 MHz

Dyn. range:

8...12 bit

'Shaping'

1/t Tailcancellation

Baselinerestorer

Hit

parameter

estimators:

Amplitude

Time

Clustering

Buffering

Link protocol

All potentially in one mixed-signal chip

Page 17: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 17

CBM DAQ and Online Event Selection

Data flow:

~ 1 TB/sec

1st level selection:

~ 1015 operation/sec

Data flow:

few 10 GB/sec

to archive: few 1 GB/sec

Moore helps

Gilder helps

Page 18: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 18

L1 Event Selection Farm Layout

Use programmable logic for cores of algorithms Use high-speed SoC processors (look beyond PC's) Use serial connection fabric (links and switches) Modular design (only few board types)

Page 19: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 19

CPU and FPGA: Destined to Merge Example Stretch S5xxx

at first glance looks like yetanother CPU with a SIMD extension, like MMX

The innovation: configurable instruction set compiler generates new instructions

and the code which uses them

Page 20: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

8-12 February 2005 ICPAQGP-05, Kolkata, Walter F.J. Müller, GSI 20

CBM FEE/DAQ Summary

Self-triggered FEE: autonomous hit detection, time-stamping with ns presision sparsification, hit buffering, high output bandwidth

High bandwidth event building network to cope with few 100 MHz interaction rate in p-p, p-A likely be done in time slices or event slices

L1 processor farm feasible with PC + FPGA + Moore (needed 2014) but look beyond todays PC's

Efficient algorithms (109 tracks/sec)

Quitedifferentfrom thecurrent

LHC styleelectronics

Substantial R&D

needed

Part of an EU FP6 project, togetherwith PANDAand COMPASS

This is FutureDAQ

Page 21: CBM at FAIR Walter F.J. Müller, GSI, Darmstadt for the CBM collaboration 5 th International Conference on Physics and Astrophysics of Quark Gluon Plasma,

CBM Collaboration : 39+ institutions, 14+ countriesChina:

Hua-Zhong Univ., WuhanCroatia: RBI, ZagrebCyprus: Nikosia Univ. Czech Republic:Czech Acad. Science, RezTechn. Univ. Prague France: IReS Strasbourg

Germany: Univ. Heidelberg, Phys. Inst.Univ. HD, Kirchhoff Inst. Univ. FrankfurtUniv. KaiserslauternUniv. Mannheim Univ. MarburgUniv. MünsterFZ RossendorfGSI Darmstadt

Russia:CKBM, St. PetersburgIHEP ProtvinoINR TroitzkITEP MoscowKRI, St. PetersburgKurchatov Inst., MoscowLHE, JINR DubnaLPP, JINR DubnaLIT, JINR DubnaLTP, JINR DubnaMEPhi, MoskauObninsk State Univ.PNPI GatchinaSINP, Moscow State Univ. St. Petersburg Polytec. U.

Spain: Santiago de Compostela Uni.

Ukraine: Shevshenko Univ. , Kiev

Hungaria:KFKI BudapestEötvös Univ. Budapest

Korea:Korea Univ. SeoulPusan National Univ.

Norway:Univ. Bergen

Poland:Krakow Univ.Warsaw Univ.Silesia Univ. Katowice Portugal: LIP Coimbra

Romania: NIPNE Bucharest

membership applications in italic