Latest infos from CERN

1. Latest infos from CERN G. Vesztergombi Jávorkút, 2009. September 3-4

2. 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.. Reasonable HOME FUNDING in average 30 kCHF/year Highlights: see next slides

3. Artist’s view of NA49 GRID-TOF (Budawall)

4. 1994 GRID-TOF REFORM dE/dX V-zero n-det Centrality det n-Veto Gap-TPC 2000

5. 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:

6. Zoltán FODOR(ELTE) Water analogy for QGP phase transition

7. HIGH ENERGY EXPERIMENTS ATCERN GREY BOOK NA61 Study of Hadron Production in Hadron-Nucleus and Nucleus-Nucleus Collisions at the CERN SPS

8. 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.

10. 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. PCI-bus in „1” PC 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!!!

12. TECHNOLOGY for a BIG EXPERIMENT (ALICE) High-speed data transfer (RD3) project + a talented engineer: S-LINK DDL-project for ALICE Concept, 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 physics use DDL : ALICE at CERN LHC SHINE/NA61 at CERN SPS STAR at RHIC Brookhaven

13. ALICE DAQ Az ALICE adatgyűjtő rendszere DDL

14. ALICE Detector Data Link

15. Detector Data Link (DDL) • Detector readout: fast data transfer to PC memory • Electronics configuration: pedestals download • Interface and data-transfer detector/DAQ

16. D-RORC

17. References • High-speed optical links produced in Hungary 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.

18. ALL the 3 biggest TPC detectors in the world: LHC ALICE, RHIC STAR , SPS SHINE are using or will use DDL produced in Hungary