Upgrade of HADES and Electromagnetic Calorimeter CENAP board, January 15, 2010 P. Tlustý NPI Řež group, Czech Republic for the HADES Collaboration HADES.

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Upgrade of HADES and Electromagnetic Calorimeter CENAP board, January 15, 2010 P. Tlustý NPI Řež group, Czech Republic for the HADES Collaboration HADES upgrade – activities of Rez group Development of electromagnetic calorimeter for HADES experiments at SIS100

Jerzy Pietraszko, HADES Collaboration meeting, GSI, Hades upgrade projects - summary List of projects  EU-FP6 Construction Contract RPC - Resistive Plate Chamber  Time res ps  Granularity needed for heavy systems (Au+Au) Forward Wall   range 0.2 – 7 degrees, reaction plane determination DAQ-Upgrade (CPUs, Event Builder, VME crates, MUv2)  goal 20kHz for Au+Au LVL1  BMBF (Bundesministerium für Bildung und Forschung) MDC Readout / Trigger (Frankfurt) RICH Readout / Trigger (München) LVL2 Compute Node (Gießen) Pion Hodoscopes (Gießen) Rebuilding of the 1st MDC layer, 6 chambers (Rossendorf) In 2010: HADES ready for heavy system experiments

3 TOF wall covers 85 0 >  >45 0 : 6 * 64 scint. Installed TOF=(t left +t right )/2  t : 90 – 140 ps dE/dx measurement Tracking x=v g *(t left -t right )+x right  Time Of Flight detector (NPI Řež contribution)

Time of Flight detector TOF channels

TOF DAQ system ADDON module (LED) TRB board (128 ch TDC)

TOF ADDON cosmic test Signals from PMT splited to ADDON and standard CFD, TDC and ADC Time walk of LED in ADDON is clearly visible For constant amplitude time resolution (now without time walk correction, just one TOT slice) is ~ 140 ps (sigma) 6

Upgrade of TOF DAQ Already done tests of new ADDON modules in comparison with old electronics Recabling of 768 channels Ready 2 TOF-ADDON+TRB sets (2x128 channels) Test of two sector setup – cosmic done To be done Installation of remaing ADDON+TRB modules sets in February Test before the beam time 7

EMC - Motivation - measurements of the respective  º and η meson two gamma decay yields together with the dielectron data for the knowledge of dielectron coctail and normalization at incident heavy ion energies 2-8 AGeV - better electron/pion suppression for large momenta (p>400 MeV/c) as compared to the present situation (at lower momenta the electron/hadron identification will be provided by the RICH and RPC)

EMC - Motivation Eur. Phys. J. C 4, (1998) Eur. Phys. J. C 4, (1998)

Side View START HADES & EMC RPC EMC The total area required for a HADES calorimeter amounts to about 8m 2 !! ElectroMagnetic Calorimeter (EMC) will replace the HADES Pre-Shower detector (18º< Θ< 45º).

Detector modules Our proposal is to use lead glass modules from OPAL end cap calorimeter. ~ 900 modules needed, at present (April 2009) 1080 modules moved to GSI. Energy resolution ~ 5%/sqrt(E), E in GeV Lead glass properties: - type: CEREN 25 - chemical composition (SiO2 -39%,PbO – 55%, K2 - 2%, Na20 – 3%) - density: 4.o6 g/cm3 - radiation length (X0): 2.51 cm - refractive index: (at 400 nm) Nucl. Instr. Meth. A290, 76 (1990) Module dimensions: 42 x 9 x 9 cm

Design Number of modules 150x6=900 Mass of one module of lead-glass 14 kg Total mass of cal kg E. Lisowski, TU Krakow

Detector modules numberlightguide, wrapping glass wrappingPMT 1lead glass, mylarmylarEMI9903KB 2lead glass, paperpaperEMI9903KB 3NOmylarEMI9903KB 4NOpaperEMI9903KB 5NOmylarHAMAMATSU1949 EMI9903KB: 1.5” tube from MIRAC (WA98) H1949: 2.5” tube from HADES Tofino Lead glass dimensions: 9.2 x 9.2 x 42 cm

Photon Beam MAMI Left up: test setup Left down: crew Right: detail with detectors, movable table and beam halo (looking in beam direction)

Measured  spectra ALLE= 1399MeVE= 1210MeV E= 1021MeVE= 831MeVE= 676MeV E= 261MeVE= 452MeVE= 72.1MeV E e =1508 MeV,  energy spread <= 1%, det. module No.1 ADC channel

Resolution vs. Energy E e = 855 MeV resolution ~ k. 1/sqrt(E)

Summary  motivation: improved dilepton spectroscopy by HADES lepton and photon pairs at the same time  current status detector modules available PMT – 70% available test with photons done, resolution measured tests with cosmics going on mechanical construction designed  plans fixing the detector module setup building one sector building full calorimeter

Talks: 47th International Winter Meeting on Nuclear Physics, Bormio, Italy, Jan P.Tlusty: Charged pion production in C+C and Ar+KCl collisions measured with HADES e-Print: arXiv: [nucl-ex] 21st International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2009), Knoxville, USA, 30th to April 4th, 2009 F.Křížek: Inclusive Dielectron Production in Ar+KCl Collisions at 1.76 AGeV studied with HADES.. XIII International Conference on Hadron Spectroscopy (Hadron2009), Tallahassee, USA, November 29 - December 4, 2009 A.Kugler: Studying hadron properties in baryonic matter and HADES XX Coll.meeting, Sesimbra, 5-10 května 2009 A. Kugler: TOF+FW P. Tlustý: Calorimeter for HADES at SIS100-plans and current status F. Křížek: Dilepton production in 1.75AGeV Publications: A/ journals Inclusive Dielectron Production in Ar+KCl Collisions at 1.76 AGeV studied with HADES. By HADES Collaboration (Filip Krizek for the collaboration). Jul pp. Published in Nucl.Phys.A830:483C-486C,2009. e-Print: arXiv: [nucl-ex]Filip Krizek Phi decay: A Relevant source for K- production at SIS energies? HADES Collaboration (G. Agakishiev et al.), 12 pp., Published in Phys.Rev.C80:025209,2009. e-Print: arXiv: [nucl-ex] The High-Acceptance Dielectron Spectrometer HADES. By HADES Collaboration (G. Agakishiev et al.). 70pp. Published in Eur.Phys.J.A41: ,2009. e-Print: arXiv: [nucl-ex]G. Agakishiev et al. Measurement of charged pions in C-12 + C-12 collisions at 1A-eV and 2A-GeV with HADES. By HADES Collaboration (G. Agakishiev et al.). Feb pp. Published in Eur.Phys.J.A40:45-59,2009. e-Print: arXiv: [nucl-ex]G. Agakishiev et al.

Deep sub-threshold Xi- production in Ar+KCl reactions at 1.76A-GeV. By HADES collaboration (G. Agakishiev et al.). Jul (Received Sep 25, 2009). 4pp. Published in Phys.Rev.Lett.103:132301,2009. e-Print: arXiv: [nucl-ex]G. Agakishiev et al. In-beam measurements of the HADES-TOF RPC wall. A. Blanco..,Y.Sobolev… et al pp. Published in Nucl.Instrum.Meth.A602: ,2009. A. Blanco..,Y.Sobolev… et al. New strangeness results from HADES L. Fabbietti et al. (HADES coll.) J. Phys. G: Nucl. Part. Phys By HADES collaboration (I. Frohlich et al.).. 10pp. Published in Int.J.Mod.Phys.A24: ,2009. e-Print: arXiv: [nucl-ex]I. Frohlich et al. Dielectron production in Ar + KCl at A-GeV with HADES. By HADES Collaboration (Filip Krizek for the collaboration). 4pp. Published in Int.J.Mod.Phys.A24: ,2009.Filip Krizek Measurement of low-mass e+ e- pair production in 1-A-GeV and 2-A-GeV C-C collision with HADES. By HADES Collaboration (M. Sudol et al.).. 4pp. Published in Eur.Phys.J.C62:81-84,2009.M. Sudol et al.

B/ Proceedings Future perspectives at SIS-100 with HADES-at-FAIR. By HADES Collaboration (I. Frohlich et al.). Jun pp. Invited talk at 47th International Winter Meeting on Nuclear Physics, Bormio, Italy, Jan e-Print: arXiv: [nucl-ex]I. Frohlich et al. Dielectron production in pp and dp collisions at 1.25-GeV/u with HADES. By HADES Collaboration (K. Lapidus et al.). Apr pp. Talk given at 19th International Baldin Seminar on High Energy Physics Problems: Relativistic Nuclear Physics andK. Lapidus et al. Quantum Chromodynamics (ISHEPP 2008), Dubna, Russia, 29 Sep - 4 Oct e-Print: arXiv: [nucl-ex] Study of the pp ---> np pi+ reaction at 1.25-GeV with HADES. By HADES Collaboration (T. Liu et al.). Sep pp. Contributed to 12th International Conference on Nuclear Reaction Mechanisms, Varenna, Villa Monastero, Italy,T. Liu et al Jun e-Print: arXiv: [nucl-ex]