Latest infos from CERN

G. Vesztergombi

Jávorkút, 2009. September 3-4

Critical mass in a “small” experiment (NA49)

3 components of an explosive mixture:

-- Experienced hardware team from nuclear physics environment-- Continuous influx of talented students-- Committed theory support group

Actions:

-- GRID-TOF stand-alone Hungarian subdetector Original design, production, installation, on-line DAQ, off-line software,analysis-- Specific RESEARCH AIMS: concentrate on pp/pA physics Motto: AA can be understood only relative to simpler systems-- In house EDUCATION CENTRE (thanks to H.G.Fischer) Every year 2 new students with a new hardware piece is added: centrality detector, (new/old) n-detector, veto-chambers, GAP TPC, np-trigger, Leadglass..

Highlights: see next slides

Reasonable HOME FUNDING in average 30 kCHF/year

Artist’s view of NA49

GRID-TOF (Budawall)

1994

2000

GRID-TOF

REFORM

dE/dX

V-zero

n-det

Centrality det

n-Veto

Gap-TPC

The CRITICAL POINT’s puzzle is well characterized by the letter of leading theorists to the SPSLC Committee which was the highest scientific decision body of CERN at that time:

Water analogy for QGP phase transition

Zoltán FODOR(ELTE)

LHC

ALICE ALICE - A Large Ion Collider Experiment

ATLAS ATLAS

CMS CMS - The Compact Muon Solenoid

LHCB LHCb

LHCF LHCf-measurement of forward neutral particle production for cosmic ray research

TOTEM Total Cross Section, Elastic Scattering and Diffraction Dissociation at the LHC

SPS

CNGS1 (OPERA) An Appearance Experiment to Search for nu_mu --> nu_tau Oscillations in the CNGS Beam

CNGS2 (ICARUS) A search programme of explicit v-oscillations with the icarus detector...

NA58 (COMPASS) COmmon Muon and Proton Apparatus for Structure and Spectroscopy

NA61(SHINE) Study of Hadron Production in Hadron-Nucleus and Nucleus-Nucleus Collisions at the CERN SPS

NA62 Proposal to Measure the Rare Decay K+ -> pi+ nu nu at the Cern SPS

NA63 Electromagnetic Processes in strong Crystalline Fields

SPOKESPERSON: Marek GAZDZICKI

SPOKESPERSON: Gyoergy VESZTERGOMBI

GLIMOS: Zoltan FODOR (RUN coordinator)

Beam:  

Approved:   21-FEB-07

Status: Data Taking

GREY BOOK NA61

Study of Hadron Production in Hadron-Nucleus and Nucleus-Nucleus Collisions at the CERN SPS

HIGH ENERGY EXPERIMENTS AT CERN

From this table one should notice the fact that in the huge CERN Laboratory exists only 12 officially acknowledged high energy physics experiments.

There is 6 planned experiments at LHC:ALICE, ATLAS, CMS, LHCb, LHCf and TOTEM

and an other 6 registered experiments at SPS:

CNGS1(OPERA), CNGS2(ICARUS), NA58(COMPASS), NA61(SHINE), NA62, NA63.

Hungary has relative large groups in CMS and ALICE, but they represent only a small minority amongst the few thousand participants.

In the small SHINE/NA61 experiment already 10 people represent a strong contingent,

but our role even more significantbecause this is the only experiment in CERN where Hungarians are occupying leading positions:

G Vesztergombi together with M. Gazdzidki are the spokespersons,

responsible separately for the proton- and heavy ion physics, respectively.

Beyond these administrative posts it is more important that the position of RUN coordination is also in Hungarian hand. Z. Fodor (RMKI) is the Technical Coordinator,

who is the commander of the real experimental work on the floor, knowing all the technical and scientific details.

Detector development – engineering

The NA49 data acquisition rate was limited to 4 - 5 Hz with a duty factor of 25% (effective rate around 1 Hz) and that seriously limited the statistics that could be collected for all measurements, including

the high pT measurements.

With this upgrade we can achieve a readout rate in excess of 40 Hz.An additional factor of 2 will be gained by reducing the sampling frequency of drift electrons . An overall readout rate exceeding 80 Hz will be thus achieved. With the typical 25% duty factor of the SPS that will result in an effective rate in excess of 20 Hz. A total of 240 MB and 8 CD were produced.

In ALICE detector one finds similar TPC as in SHINE, which has about only 3 times more (500,000) pads, but using 500 DDL channels and 200 CPU units to collect the data. In case of the SHINE detector, however, one uses about 60 times smaller number (8) of DDL channels and 200 times less number of CPUs, i.e. the new SHINE-DAQ system capable to handle similar order of magnitude data volume by a SINGLE COMPUTER!!!

PCI-bus in„1” PC

TECHNOLOGY for a BIG EXPERIMENT (ALICE)

High-speed data transfer (RD3) project + a talented engineer: S-LINK

DDL-project for ALICEConcept, protocol, design, prototype G. Rubin’s team Production in Hungary

Tecnhology transfer: FPGA design technology, rad.hard electronics

Spin-off company supported by Hungarian R&D funds

All the presently existing large acceptance TPCs in heavy ion physicsuse DDL :

ALICE at CERN LHCSHINE/NA61 at CERN SPSSTAR at RHIC Brookhaven

Az ALICE adatgyűjtő rendszere

DDL

ALICE DAQ

ALICE Detector Data Link

Detector Data Link (DDL)

• Detector readout: fast data transfer to PC memory

• Electronics configuration: pedestals download

• Interface and data-transfer detector/DAQ

D-RORC

References

High-speed optical links produced in Hungary High-speed optical links produced in Hungary work at data acquisition systems at:work at data acquisition systems at:

CERN ● INFN (Roma ● Torino ● Bologna ● Napoli ● Pisa) IPN (Orsay, Nantes) ● CEA (Paris) ● NIKHEF (Amsterdam) Max-Planck Institute (München) ● KFKI-RMKI (Budapest)

Stockholm University ● IFAE (Univ. of Barcelona) ● Univ. of Valencia Univ. of Lausanne ● TU München ● Bärgische Univ. Wuppertal

Johannes Gutenberg Universität ● Mancester University Univ. of Chicago ● Indiana University ● Caltech (Los Angeles)

● Argonne Nat. Lab. (Chicago) ● Los Alamos Nat. Lab. Fermilab (Batavia) ● Brookhaven Nat. Lab. (New Yersey)

IRAM (an observatory in the Pirennes) a space telescope in Hawaii ● etc.

ALL the 3 biggest TPC detectors in the world:

LHC ALICE, RHIC STAR , SPS SHINE

are using or will use DDL produced in Hungary