First experiments after HADES upgrade

CENAP board, September 24, 2010

P. Filip, A. Kugler, O. Svoboda, Y. Sobolev, P. Tlustý, V. Wagner

NPI Řež group, Czech Republicfor the HADES Collaboration

• HADES upgrade – activities of Rez group

• beam tests

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List of Hades upgrade projects

RPC - Resistive Plate Chamber FINISHED Time res. 50-80ps Granularity needed for heavy systems (Au+Au)

Forward Wall FINISHED range 0.2 – 7 degrees, reaction plane

determination DAQ-Upgrade (CPUs, Event Builder, VME crates, MUv2)

goal 20kHz for Au+Au LVL1 ONGOING MDC Readout / Trigger FINISHED RICH Readout / Trigger FINISHED TOF+FW Readout / Trigger FINISHED LVL2 Compute Node ONGOING Pion Hodoscopes ONGOING Rebuilding of the 1st MDC layer, 6 chambers FINISHED

In 2010: HADES ready for heavy system experiments

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TOF wall covers 850 >>450:

6 * 64 scint. Installed TOF=(tleft+tright)/2 t : 90 – 140 ps dE/dx measurementTracking x=vg*(tleft-tright)+xright

Time Of Flight detector (NPI Řež contribution)

HADES HADES Forward Forward HodscopeHodscope

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Forward Hodoscope with 288 Forward Hodoscope with 288

counters.counters. 140 small (4x4 cm2);

64 middle (8x8 cm2);

84 large (16x16 cm2)

7.17o 3.5o 2.10

Distance from target 7 m.

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TOF and FW DAQ systemTOF and FW DAQ system

ADDON module (LED) TRB board (128 ch TDC)

Upgrade of TOF and FW DAQUpgrade of TOF and FW DAQ

Already done• tests of new ADDON modules in comparison with old

electronics• Installation of 768 channels for TOF• Installation of 288 channels for FW• Test of new setup – cosmics radiation and beam

July 2010 – Ca+Au at 1.25 A GeV, U+Au at 0.9 A GeV

September 2010 – Ni+Au at 1.25 A GeV

To be done• Detailed analysis of the beam data

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Tests of the new setupTests of the new setup

July 2010 – Ca+Au at 1.25 A GeV, U+Au at 0.9 A GeV

September 2010 – Ni+Au at 1.25 A GeV

- all detectors in setup, including new detectors (RPC,FW,MDC1)

- new FE and DAQ readout- new central trigger unit

- full setup working- Sep.2010 : 25 hours of beam, 340 mil. events taken - readout rate 15kHz

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TOF data from Ni+Au beam test

FW data from Ni+Au beam test

Summary

motivation: improved dilepton spectroscopy by HADES

heavy systems, high beam intensities

current status full detector setup working including new detectors

new readout installed, working high readout rate – 15kHz LVL1 trigger

plans beam test in October – DAQ, central trigger system, Start detector Experiment Au+Au at 1.25 A GeV

EMC - MotivationEMC - 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)

Side View

START

HADES & EMC

RPC

EMC

The total area required for a HADES calorimeter amounts to about 8m2 !!

ElectroMagnetic Calorimeter (EMC) will replace the HADES Pre-Shower detector (18º< Θ< 45º).

Resolution vs. EnergyResolution vs. Energy Ee= 855 MeV

resolution ~ k . 1/sqrt(E)

Talks:

47th International Winter Meeting on Nuclear Physics, Bormio, Italy, 26-30 Jan 2009.P.Tlusty: Charged pion production in C+C and Ar+KCl collisions measured with HADESe-Print: arXiv:0906.2309 [nucl-ex] 21st International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2009), Knoxville, USA, 30th to April 4th, 2009F.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, 2009A.Kugler: Studying hadron properties in baryonic matter (HADES@GSI and HADES@FAIR)

HADES XX Coll.meeting, Sesimbra, 5-10 května 2009A. Kugler: TOF+FWP. Tlustý: Calorimeter for HADES at SIS100-plans and current status F. Křížek: Dilepton production in Ar+KCl @ 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 2009. 4pp. Published in Nucl.Phys.A830:483C-486C,2009. e-Print: arXiv:0907.3690 [nucl-ex] 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:0902.3487 [nucl-ex]The High-Acceptance Dielectron Spectrometer HADES.By HADES Collaboration (G. Agakishiev et al.). 70pp. Published in Eur.Phys.J.A41:243-277,2009. e-Print: arXiv:0902.3478 [nucl-ex] 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 2009. 15pp. Published in Eur.Phys.J.A40:45-59,2009. e-Print: arXiv:0902.4377 [nucl-ex]

Deep sub-threshold Xi- production in Ar+KCl reactions at 1.76A-GeV. By HADES collaboration (G. Agakishiev et al.). Jul 2009. (Received Sep 25, 2009). 4pp. Published in Phys.Rev.Lett.103:132301,2009. e-Print: arXiv:0907.3582 [nucl-ex]  In-beam measurements of the HADES-TOF RPC wall.A. Blanco..,Y.Sobolev… et al. 2009. 5pp. Published in Nucl.Instrum.Meth.A602:691-695,2009.  New strangeness results from HADES L. Fabbietti et al. (HADES coll.)J. Phys. G: Nucl. Part. Phys. 36 064005 By HADES collaboration (I. Frohlich et al.).. 10pp. Published in Int.J.Mod.Phys.A24:317-326,2009. e-Print: arXiv:0809.2764 [nucl-ex]  Dielectron production in Ar + KCl at 1.756-A-GeV with HADES.By HADES Collaboration (Filip Krizek for the collaboration). 4pp. Published in Int.J.Mod.Phys.A24:603-606,2009. 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.

B/ Proceedings  Future perspectives at SIS-100 with HADES-at-FAIR.By HADES Collaboration (I. Frohlich et al.). Jun 2009. 7pp. Invited talk at 47th International Winter Meeting on Nuclear Physics, Bormio, Italy, 26-30 Jan 2009. e-Print: arXiv:0906.0091 [nucl-ex] Dielectron production in pp and dp collisions at 1.25-GeV/u with HADES.By HADES Collaboration (K. Lapidus et al.). Apr 2009. 6pp. Talk given at 19th International Baldin Seminar on High Energy Physics Problems: Relativistic Nuclear Physics and Quantum Chromodynamics (ISHEPP 2008), Dubna, Russia, 29 Sep - 4 Oct 2008. e-Print: arXiv:0904.1128 [nucl-ex]  Study of the pp ---> np pi+ reaction at 1.25-GeV with HADES.By HADES Collaboration (T. Liu et al.). Sep 2009. 7pp. Contributed to 12th International Conference on Nuclear Reaction Mechanisms, Varenna, Villa Monastero, Italy, 15-19 Jun 2009. e-Print: arXiv:0909.3399 [nucl-ex]