sherlock holmes and mystery of the soup m. deveaux goethe-universität frankfurt/m

Sherlock Holmes and Mystery of the Soup

M. DeveauxGoethe-Universität

Frankfurt/M

http://www.bmbf.de/

A Question to Sherlock Holmes

M. Deveaux, FAIRNESS Workshop, 3. – 8. Sept 2012, Hersonissos, Greece 2

Annette Schavan, FederalMinister of Research, Germany The cookThe soup

Sherlock Holmes Quest


How can one check that the soup has cooked?



?



=



Dissolves fast

Gets quickly soft if cooked

Gets slowly soft if cooked



Lets test ingredients, which keep information on the cooking process.



Dissolves also at room temperature

Keeps softening after cooking

Reacts slowly, might overlook cooking



We will have to test as many ingredients as possible to ob-tain a conclusive answer.

The Quest of CBM

The CBM-Experiment

M. DeveauxGoethe-Universität

Frankfurt/M

From my personal point of view

http://www.bmbf.de/

The nuclear phase diagram


13

Observables

UrQMD transport calculation U+U 23 AGeV

CBM probes at highest baryonic densities


CBM

CBM uses Charm and Open Charm at threshold


CBM p-A

“The cross section obtained in the present experiment is also larger than theoretical estimates, and this requires a more thorough investigation into the problem.”

CBM uses Charm and Open Charm at threshold


CBM will allow to access charm closeto production threshold

CB

M A

-A

17

Experiment Energy range(Au/Pb beams)

Reaction ratesHz

Observables, sNN= 8 GeV

hadrons

flow, fluct., correl.

dileptonsdi-

e/di-µ

charm

STAR@RHICBNL

sNN = 7 – 200 GeV 1 – 800(limit luminosity) yes yes no no

NA61@SPSCERN

Ekin= 20 – 160 AGeV

sNN= 6.4 – 17.4 GeV

80(limit detector) yes yes no no

MPD@NICADubna

sNN= 4.0 – 11.0 GeV ~1000(at design luminosity ) yes yes no no

CBM@FAIRDarmstadt

Ekin= 2.0 – 35 AGeV

sNN= 2.7 – 8.3 GeV

105 – 107

(limit detector) yes yes yes yes

Experiments on super-dense nuclear matter

M. Deveaux, FAIRNESS Workshop, 3. – 8. Sept 2012, Hersonissos, Greece

Observables


minimum bias Au+Au collisions at 25 AGeV (from HSD and thermal model)

SPS: Pb+Pb 30 AGeVSTAR: Au+Au sNN=7.7 GeV

motivating CBM`s experimental requirements in precision and rates

mu

ltip

lici

ty

bra

nch

ing

rati

o

, sNN=19.6 GeV

J. H

euse

r, Q

M20

12

The design of CBM


MVD – find decay vertex

STS – measuremomentum

RICH – identify“slow” electrons

TRD – identifyfast electrons

RPC (TOF) – identify“slow” hadrons

ECAL – measuregammas

PSD – measureevent plane

Some observables


MVD, decayvertex ID

STS - Momentum

RICH – e ID+ fast p ID

TRD – e IDRPC (TOF) - p- ID p - K separation

PSD – Eventplane

ECAL

D0 => K + pMajor cut = displaced vertexRemaining background = + , p p p + p …

Some observables


MVD, g=> e+/e-rejection

STS - Momentum

RICH – slow e ID

TRD – fast e ID

RPC (TOF) – hadron suppr.

PSD – Eventplane

, ,r w f …=> e+/e-Major cut = Particle IDRemaining background = => g e+/e-

ECAL – measurep0 and e for cocktail

Some observables


MVD, g=> e+/e-rejection

STS - Momentum

RICH – slow e ID

TRD – fast e ID


PSD – Eventplane

ECAL

J/Y …=> e+/e-Major cut = Particle ID, pt > 1.2 GeV

Some observables


MVD

STS - Momentum

RICH – slow e ID

TRD – tracking


PSD – Eventplane

ECAL

, , ,w r f J/Y …=> µ+/µ-Major cut = Particle IDRemaining background = => + p m X

Much – Active Muon absorber

CBM aims to measure vector mesons via e+/e- AND µ+/µ-in SEPARATE runs => control systematics

CBM – The trigger concept


Contradiction: • Complex trigger signature => Need

high CPU time• High rate => Need immediate decision

Observable Trigger signature

Ambitio-ned rate

(Multi)-Strange Displaced Vertex ~106

Open Charm Displaced Vertex ~105

Vector mesons => e+/e-

None ~104

Vector mesons => µ+/µ-

µ combinations ~105

J/y => e+/e- High pt electron ~106

J/y => µ+/µ- µ combinations ~107

Detector

FEE buffer

Readoutbuffer

Switch

Processorfarm

Storage

L1trigger

HLT

Conventinal DAQ

The concept of the CBM-DAQ


Detector

FEE buffer

Readoutbuffer

Switch

Processorfarm

Storage

L1trigger

HLT

Conventinal DAQCBM

L1

Self-triggered Front-end.All Hits are shipped to

DAQ in data push mode.

Real time event building

Event Selection after tracking and partial

reconstruction.Use of highly parallel hardware (Multicore

CPU/GPGPU).

Data buffer outside cave. Memory for L1 decision latencies of 10-100 ms

Fast data links

240 core CPU

DAQ in simple words


?

ST

S

MV

DR

ICH

TR

D

EC

AL

TO

FM

UC

H

FC

AL

~ 1TB/s

http://compeng.uni-frankfurt.de/index.php?id=86

A little computing hardware – the LOEWE CSC


• Rank 22 in the Top500 List of Supercomputers.• 832 Nodes (20900 Cores, 778 GPGPU)• 56 TB RAM, 2000 TB HDD• 420 TB high speed HDD mit 10 GB/s

CPU - 176 TFlop/s (peak, dp), GPGPU - 2.1 PFlop/s (peak, sp), 599 TFlop/s (peak, dp) Cooling < 10% of the power consumption

http://compeng.uni-frankfurt.de/index.php?id=86

A little bigger hardware


CBM

~500m

'Green Cube'

1 TB/s

Der Green Cube wurde von der Helmholtz-Gemeinschaft als Projekt mit höchster Priorität aller Ausbauinvestionen eingestuft

From Simulation to Reality


Again, this structure will be fixed with

the novel Anti Gravitation Glue™.

30M. Deveaux,

Open charm reconstruction: Concept

Primary Beam: 25 AGeV Au Ions (up to 109/s)

Primaryvertex Secondary

vertex

Short lived particle D0 (ct = ~ 120 µm)

Detector 1Detector2Target

(Gold)

z

Reconstruction concept for open charm

Central Au + Au collision (25 AGeV)

• A good time resolution to distinguish the individual collisions (few 10 µs)

• Very good radiation tolerance (>1013 neq/cm²)

Reconstructing open charm requires: • Excellent secondary vertex resolution (~ 50 µm)=> Excellent spatial resolution (~5 µm)=> Very low material budget (few 0.1 % X0)=> Eventually: Detectors in vacuum

The CBM-experiment (at FAIR)

The CBM MicroVertex Detector

M.Deveaux 31

Requirements vs. detector performances (2003)

Required(CBM)

Hybrid pixels

Single point res. [µm] ~ 5 ~ 30

Material budget [ X0 ] ~ 0.3% 1%

Time resolution [µs] few 10 0.025

Rad. hardness [n/cm²] > 1013 >> 1014

CCD

~ 5

~0.1%

~100

<< 1010

NA60hybrid pixel

M. Deveaux 32

Requirements vs. detector performances (2003)

Required Hybrid pixels


Material budget [ X0 ] ~ 0.3% ~ 1%

Time resolution [µs] few 10 0.025

Rad. hardness [n/cm²] > 1013 >> 1014

CCD

~ 5

~ 0.1%

~100

<< 1010

NA60hybrid pixel

More sensitivity

More statistics

We need both

33

CMOS Monolithic Active Pixel Sensors (MAPS)

Required Hybrid pixels


Material budget [ X0 ] ~ 0.3% 1%

Time resolution [µs] 10-100 0.025

Rad. hardness [n/cm²] > 1013 >> 1014

CCD

~ 5

~0.1%*

~100

<< 1010

MAPS(2003)

3.5

~0.05%*

>1000

> 1012

*Sensor only

MAPS provide an unique compromise between:• sensitivity• high rate capability

Time resolution and rad.tolerance need improvement=> Perform R&D

Sensor R&D: How to gain speed

34

External ADCSensor Offline Cluster

finding

Output

Add pedestal correction

~1000 discriminators

On - chip cluster-finding processor

Output: Cluster information(zero surpressed)

MAPS are built in CMOStechnology

Allows to integrate:• sensor• analog circuits• digital circuits

on one chip.

Sensor R&D: How to gain speed

35

Pixel with pedestal correction

~1000 discriminators

On - chip cluster-finding processor

Output: Cluster information(zero surpressed)

MIMOSA-1(2000)

MIMOSA-5(2002)

MIMOSA-20(2006)

MIMOSA-26(2009)

Readout Serial Serial Serial Mk. 2 Digital

Pixel/line/s 5M 20M 50M 2500M

Data/sensor: 1200 Mbps 160 Mbps

Serial readout parallel

Readout time before: 1-20 msReadout time now: ~100 µs

Improve further with shorter columns.Improve with “DDR-readout”

36M. Deveaux

Sensor R&D: The operation principle

Reset+3.3V+3.3V

Output

SiO2 SiO2 SiO2

N++ N++N+ P+

P-

P+

15µm50µm

37

Sensor R&D: Tolerance to non-ionising radiation

+3.3VOutput

SiO2 SiO2

N++

N+SiO2 SiO2

P++ P++ P++

GND GND

+3.3V

38


+3.3VOutput

SiO2 SiO2

N++

N+SiO2 SiO2

P++ P++ P++

GND GND

+3.3V

Key observation: Signal amplitude is reduced by bulk damage

39


+3.3VOutput

SiO2 SiO2

N++

N+SiO2 SiO2

P++ P++ P++

GND GND

+3.3V

Electric field increases the radiation hardness of the sensorDraw back: Need CMOS-processes with low doping epitaxial layer

E

S/N of MIMOSA-18 AHR (high resistivity epi-layer)

M. Deveaux 40

Plausible conclusion: Radiation tolerance ~1014 neq/cm² reached• Cooling required to operate heavily irradiated sensors

Preliminary

Safe operation

0 5 10 15 20 25 300

10

20

30

40

50

60

70

80

10µm 12.5µm 25µm

T=-34°C/-70°CS

ign

al t

o N

ois

e (

Ru

-10

6 )

Radiation dose [1013neq

/cm2]

Mimosa-9 (2005)20 µm standard epi

0.2 x 1013 neq/cm²

D. D

oeri

ng, P

. Sch

arre

r, M

. Dom

acho

wsk

i

CMOS – Monolithic Active Pixel Sensors


~100 µs25µs~ 6 ms~ 30 µsReadout time

> 300 kRad> 3 MRad<200 kRad> 3 MRadRad. tol. io

> 1x1013 neq>3x1014neq~1012 neq>1013 neq/cm²Rad. tol. non-io.

0.05% X0 0.05% X0~ 0.1% X0< 0.05% X0Material budget

3.5 µm~1 µm~2 µm~ 5 µmSingle point res.

Mi-26 (2010)

MAPS (2012*)

Mi-5 (2002)

CBM (Startup)

x 60

x 15

x 300

x 2

--

Improve-ment

CMOS Monolithic ActivePixel Sensoren

* Best of specialized sensors

R&D carried out in synergy with STAR HFT, EUDET, AIDA and (recently) ALICE ITS upgrade.

Discri

Sensor Dis

cri

Sens

orD

iscri

Sensor

Discri

Sensor Dis

cri

Sens

or

Discri

Sensor

Discri

Sensor

M. Deveaux 42

T. Tischler

MIMOSIS1B

MIMOSIS1A

Discri

Sensor

Discri

Sensor

Discri

Sensor

Integration concept of the MVD

MVD Prototype (mock up)

Prototype: Beam test setup

M. Deveaux 43

Ambitioned performances:• Up to 8 MIMOSA-26 running @10k frames/s, 3.5µm resolution.• Local DAQ based on HADES TRB - 1.3 Gbps data, scalable.• Actively cooled prototype (<0.3% X0)

• Passively cooled telescope arms (0.05% X0)

T. Tischler

MVD Prototype

Reference telescope

Prototype: Beam test setup

M. Deveaux 44

2 MIMOSA-26 operated with …. the prototype readout electronicsBeam spot seen, work in progress…

Beam test planned late for November @ CERN-SPS

System integration: Outlook


Idea from R

. De O

liveira, W.D

ulinski

Thanks to C

ER

N and IP

HC

600.000 pixels and a readout cable(mechanical demonstrator)

Concept of the STS


The Silicon Tracking System…a high performance silicon strip detector, 8 Layers – 70 cm long

Integrated technical design


power dissipation:planned prototypes: 37 kWoptimized distribution: 27 kW

cooling

of electronics with CO2 cooling system

and of Si sensors with dry gas

operation temperature:

~ -5o C to -10o C

• STS

• MVD

• beam pipe

• target

in dipole magnet gap:1.4 1.8 1.0 m3

electronics, cooling pipes, low voltage cables, optical data links

thermal insulation, windows

maintenance

The concept of the STS


Technology: Double sided strip detectors with 15° stereo angleFront side provides X-, backside Y-coordinate

The concept of the STS


Beam tests of the STS


silicon microstrip detectors

self-triggering front-end electronics

DAQ

online monitoring

tracking σ =32 m σ =32 m σ =58 m

2.4 GeV protons

neutron-irradiated sensor

Status of CBM


See Talk of C. DritsaSee Talk of A. Arend

Status of CBM – other detectors


RPC prototype

In general: Prototypes are under beam test, CBM approaches TDR

Beam test setup GEM forMUCH at COSY

Beam test results from ELBE

What else? Feasibility studies and quality control


M. Deveaux, 16th CBM collaboration meeting , 30th Sept. 2010, Mamaia 53M. Deveaux, 16th CBM collaboration meeting , 30th Sept. 2010, Mamaia 53

ρωφ→e+e- J/ψ→e+e-

track reconstructionefficiency

momentum resolution Δp/p

ρωφ→μμ

J/ψ→μμ

Ω-

54

CBM physics book Lecture Notes in Physics Vol. 814 April 29, 20111000 pages, 400 figures, 2000 citations

General IntroductionPrelude by Frank WilczekFacets of MatterExecutive Summary

Part I BULK PROPERTIES OF STRONGLY INTERACTING MATTER

Part II IN-MEDIUM EXCITATIONS

Part III COLLISION DYNAMICS

Part IV OBSERVABLES AND PREDICTIONS

Part V CBM EXPERIMENT

M. Deveaux, FAIRNESS Workshop, 3. – 8. Sept 2012, Hersonissos, Greece

Status of FAIR


+ = ?

The location of CBM @ FAIR

Heavy-ion synchrotrons SIS-100, SIS-300

SIS-100 / SIS-300:

protons: 2 - 29/89 GeV

ions: 2 - 14/44 AGeV, sNN= 1.9 - 4.5/ 4.2 - 9 GeV

intensities: up to 109 ions per second at CBM

CBM

Johann M. Heuser et al. - The CBM experiment at FAIR 56

The CBM cave


length: 37 mwidth: 27 m height: 17 m

control room + service building

underground hall:

Status:

Planning completed

Building application filed

Status of FAIR


201220112010 2013 201620152014 2017

foundation of FAIR company, 4 Oct. 2010

building applications

preparation of construction site

start installation of accelerators and detectors

construction of FAIR – SIS-100

start of construction:construction permit and526 MEuro funding received

completion of structural workstenders

2018:data taking

Status of the Accelerator


Dipole magnets for SIS-100 Dipole magnets for SIS-300

Prototypes for industrial mass production have been developed.

Important milestone: SIS-100 dipole series has been tendered.

Breakthrough in July 2012:

Successful test of the first curved prototype dipole (DISCORAP Collaboration, LASA lab, INFN Milan, Italy)

• fields up to 4.5 T • field ramps (currently limited to 0.4 T/s)

Babcock-Noell

Status of the accelerator


Winter 2011/12

Summer 2011

Spring 2012FAIR site preparation

Summary and conclusion


CBM searches for first order phase transition, critical point …

CBM is to measure the widest possible range of observables

Building CBM is a challenge BUTThe R&D is supported by helpful trends in industry:

• Multicore and GPGPU computing• New chip manufacturing processes• High bandwidth data network technologies

Detector prototypes are being build and tested in beam,writing TDR is envisaged for 2013-2014

The construction of FAIR has started, expect beam on target 2018

Conclusion


CBM is gaining momentum

Stay tuned

sherlock holmes and mystery of the soup m. deveaux goethe-universität frankfurt/m

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