Upgrade of HADES and Electromagnetic Calorimeter

CENAP board, January 15, 2010

P. TlustýNPI Řež group, Czech Republicfor the HADES Collaboration

• HADES upgrade – activities of Rez group

• Development of electromagnetic calorimeter for

HADES experiments at SIS100

Jerzy Pietraszko, HADES Collaboration meeting, GSI, 01 - 05.07.2008

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Hades upgrade projects - summary

List of projects EU-FP6 Construction Contract

RPC - Resistive Plate Chamber Time res. 50-80ps 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

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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)

Time of Flight detectorTime of Flight detector

TOF channels

TOF DAQ systemTOF DAQ system

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

TOF ADDON cosmic testTOF 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)

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Upgrade of TOF DAQUpgrade 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

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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)

EMC - MotivationEMC - Motivation

Eur. Phys. J. C 4, 231-247 (1998)

Eur. Phys. J. C 4, 249-257 (1998)

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).

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: 1.708 (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. 12600 kg

E. Lisowski, TU Krakow

Detector modulesDetector modules

number lightguide, wrapping

glass wrapping PMT

1 lead glass, mylar mylar EMI9903KB

2 lead glass, paper paper EMI9903KB

3 NO mylar EMI9903KB

4 NO paper EMI9903KB

5 NO mylar HAMAMATSU1949

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 Setup @ MAMIPhoton Beam Setup @ MAMI

Left up: test setup

Left down: crew

Right: detail with detectors,

movable table and beam halo

(looking in beam direction)

Measured Measured spectra spectra ALL E= 1399MeV E= 1210MeV

E= 1021MeV E= 831MeV E= 676MeV

E= 261MeV E= 452MeV E= 72.1MeV

Ee=1508 MeV, energy spread <= 1%, det. module No.1

ADC channel

Resolution vs. EnergyResolution vs. Energy Ee= 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, 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]